[1] Conversion of chemical energy into electrical energy occurs in –
A.
atomic bombs
B.
dynamo
C.
a battery
D.
electric heaters
Ans:
a battery
Explanation :
A battery is a form of chemical energy that can be converted to electrical energy. it is a device consisting of one or more electrochemical cells which performs this action. The first battery (or "voltaic pile") was invented in 1800 by Alessandro Volta.
[2] Damp clothes are dried in spin dryers by the action of –
A.
centripetal forces
B.
centrifugal forces
C.
central forces
D.
non central forces
Ans:
centrifugal forces
Explanation :
The spin dryer is probably the most familiar centrifuge. The spin dryer of a washing machine removes excess water from the clothing by rotating at a high speed. The high speed of rotation creates a high centrifugal force for the water in the clothing which causes it to be pulled to the outside of the spinning portion of the washing machine and away from the clothes.
[3] Which colour of light shows maximum deviation when passed through a prism?
A.
Red
B.
Green
C.
Violet
D.
Yellow
Ans:
Violet
Explanation :
When passed through a prism violet colour of light shows maximum deviation. As white light passes through a prism, the violet component, having the minimum wave length observes the maximum refractive index for the prism and, thus, gets deviated to the maximum extent.
[4] Which one of the following is called a red planet?
A.
Venus
B.
Mercury
C.
Mars
D.
Jupiter
Ans:
Mars
Explanation :
Mars is the fourth planet from the Sun and the second smallest planet in the Solar System. Named after the Roman god of war, it is often described as the “Red Planet”, as the iron oxide prevalent on its surface gives it a reddish appearance. Mars is a terrestrial planet with a thin atmosphere, having surface features reminiscent both of the impact craters of the Moon and the volcanoes, valleys, deserts, and polar ice caps of Earth.
[5] Which of the following is the unit of distance in navigation?
A.
Knot
B.
Nautical mile
C.
Bar
D.
Angstrom
Ans:
Nautical mile
Explanation :
A nautical mile is based on the circumference of the earth, and is equal to one minute of latitude. It is slightly more than a statute (land measured) mile (1nautical mile = 1.1508 statute miles).
[6] The resistance of the human body (dry condition) is of the order of –
A.
10¹ Ohm
B.
10² Ohm
C.
10³ Ohm
D.
None of these
Ans:
None of these
Explanation :
The level of current passing through the human body is directly related to the resistance of its path through the body. Under dry conditions, the resistance offered by the human body may be as high as 100,000 Ohms. Wet or broken skin may drop the body’s resistance to 1,000 Ohms. (Source: The Guide to Photovoltaic System Installation by Gregory Fletcher)
[7] The sharpness of a television image is termed as its –
A.
Clarity
B.
Colour
C.
Resolution
D.
Graphics
Ans:
Resolution
Explanation :
Resolution is an umbrella term that describes the detail an image holds. The term applies to raster digital images, film images, and other types of images. The display resolution of a digital television, computer monitors or display device is the number of distinct pixels in each dimension that can be displayed.
[8] 0°K is equivalent to
A.
273°C
B.
-273°C
C.
0°C
D.
100°C
Ans:
-273°C
Explanation :
0 degrees Kelvin is equal to -273.15 degrees Celsius. It is the lowest possible temperature, at which all molecules are have the least possible amount of kinetic energy.
[9] What is the telescope designed to search for earth-size planets in the nearby region of our galaxy, termed as?
A.
Hubble telescope
B.
Kepler telescope
C.
Copernicus telescope
D.
Newton telescope
Ans:
Hubble telescope
Explanation :
The Hubble Space Telescope (HST) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation.
[10] Which law is also called the law of inertia?
A.
Newton's first law
B.
Newton's Second Law
C.
Newton's Third Law
D.
All of these
Ans:
Newton's first law
Explanation :
An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. In fact, it is the natural tendency of objects to resist changes in their state of motion.
[11] Ohm’s law obeyed in -
A.
a metallic conductor
B.
a semi conductor
C.
an electron tube
D.
in all of the above
Ans:
a metallic conductor
Explanation :
There are, however, components of electrical circuits which do not obey Ohm's law; that is, their relationship between current and voltage (their I–V curve) is nonlinear (or non-ohmic).
[12] Solar energy is due to –
A.
fusion reactions
B.
fission reactions
C.
combustion reactions
D.
chemical reactions
Ans:
fusion reactions
Explanation :
Nuclear Fusion Reaction is the process which is responsible for the sun to radiate energy in the form of light and heat commonly known as solar energy. Fusion occurs when hydrogen atoms fuse together under extreme heat and pressure to create a denser helium atom releasing, in the process, colossal amounts of energy.
[13] The plastic material commonly used for making gear wheels is –
A.
Polyesters
B.
Nylons
C.
Bakelit
D.
Polystyrene
Ans:
Nylons
Explanation :
Popular materials for plastic gears are acetal resins such as DELRIN, Duracon M90; nylon resins such as ZYTEL, NYLATRON, MC901 and acetal copolymers such as CELCON. The physical and mechanical properties of these materials vary with regard to strength, rigidity, dimensional stability, lubrication requirements, moisture absorption, etc.
[14] The nuclear force is -
A.
Short range repulsive force
B.
Short range attractive force
C.
Long range repulsive force
D.
Long range attractive force
Ans:
Short range attractive force
Explanation :
Nuclear forces (also known as nuclear interactions or strong forces) are the forces that act between two or more nucleons. They bind protons and neutrons (“nucleons”) into atomic nuclei.
[15] The angle in which a cricket ball should be hit to travel maximum horizontal distance is :
A.
60° with horizontal
B.
45° with horizontal
C.
30° with horizontal
D.
15° with horizontal
Ans:
45° with horizontal
Explanation :
This has to do with the equation of a parabola or trajectory which is θ z = (tanθ)x - x2 2(cosθ) We can see that if the ball is fired at a 45 degree angle from the ground, the horizontal distance will be a maximum.
[16] The minimum number of geostationary satellites needed for un-interrupted global coverage is :
A.
3
B.
2
C.
4
D.
1
Ans:
2
Explanation :
In theory, 2 satellites in diametrically opposite geosynchronous orbits could cover the planet. In order for the satellites to communicate, a minimum of 3 would be needed, each at a 60 degree angle to the others. At this point, the strength and quality of coverage increases proportionally to the number of satellites.
[17] Which type of mirror is used in the head lights of vehicles?
A.
Plane mirror
B.
Concave mirror
C.
Convex mirror
D.
Parabolic mirror
Ans:
Concave mirror
Explanation :
Car head lights have concave mirrors because it collects and focuses as much as possible of the light from the bulb and send it out as a fairly tight beam in one direction only. The bulb of the head light is placed at the focal point. The reflected light is parallel and gives more visibility to the driver at night.
[18] The height of a geostationary satellite from the Earth's surface is approximately:
A.
36,000 km
B.
42,000 km
C.
30,000 km
D.
None of these
Ans:
36,000 km
Explanation :
A geostationary orbit is a circular orbit 35,786 kilometres above the Earth's equator and following the direction of the Earth's rotation. Communications satellites and weather satellites are often given geostationary orbits, so that the satellite antennas that communicate with them do not have to move to track them, but can be pointed permanently at the position in the sky where they stay.
[19] Shaving mirror is –
A.
Convex
B.
Concave
C.
Plane
D.
Parabolic
Ans:
Concave
Explanation :
Concave mirrors are used in makeup or shaving mirrors. When shaving or applying makeup, a person holds the mirror close to her face. This allows him to see an enlarged image of him face, which is helpful for applying makeup or shaving correctly.
[20] Magnifying Glass is basically a –
A.
Plano-concave lens
B.
Concave lens
C.
Convex lens
D.
Cylindrical lens
Ans:
Convex lens
Explanation :
A magnifying glass is a convex lens that is used to produce a magnified image of an object. The magnification of a magnifying glass depends upon where it is placed between the user's eye and the object being viewed, and the total distance between them.
[21] The velocity of heat radiation in vacuum is –
A.
Equal to that of light
B.
Less than that of light
C.
Greater than that of light
D.
Equal to that of sound
Ans:
Equal to that of light
Explanation :
Electrons are generally responsible for heat conduction. The phonons (vibrations of the nuclei) also play a part, depending on the temperature of the medium. It depends on the specific conductor you're using. At some point, in a vacuum, the electrons have to be excited enough to spit out photons, which are Electromagnetic radiation, which in a vacuum should go on forever at the speed of light theoretically.
[22] Which of the following is the best conductor of electricity?
A.
Ordinary water
B.
Sea water
C.
Boiled water
D.
Distilled water
Ans:
Sea water
Explanation :
Sea water is a "good" conductor. It has a resistance and resistance increases by distance. So if you dip a very high voltage electric wire in the ocean, the area around it (even 100 meters or more based on how high it is) gets electric.
[23] Which of the following colours has got the maximum refractive index for glass?
A.
Blue
B.
Green
C.
Red
D.
Indigo
Ans:
Red
Explanation :
0
[24] The working principle of a washing machine is :
A.
centrifugation
B.
dialysis
C.
reverse osmosis
D.
diffusion
Ans:
centrifugation
Explanation :
The working of the washing machine is quite high tech, and includes a set sequence of washing, rinsing, and spinning (plus a pre-wash if desired).
[25] The hydraulic brake used in automobiles is a direct application of -
A.
Archimedes principle
B.
Torricellean law
C.
Bernoulli's Theorem
D.
Pascal's law
Ans:
Pascal's law
Explanation :
Pascal's law basically states that any pressure applied to a fluid inside a closed system will transm it that pressure equally in all directions throughout the fluid.
Explanation :
A battery is a form of chemical energy that can be converted to electrical energy. it is a device consisting of one or more electrochemical cells which performs this action. The first battery (or "voltaic pile") was invented in 1800 by Alessandro Volta.
[2] Damp clothes are dried in spin dryers by the action of –
A.
centripetal forces
B.
centrifugal forces
C.
central forces
D.
non central forces
Ans:
centrifugal forces
Explanation :
The spin dryer is probably the most familiar centrifuge. The spin dryer of a washing machine removes excess water from the clothing by rotating at a high speed. The high speed of rotation creates a high centrifugal force for the water in the clothing which causes it to be pulled to the outside of the spinning portion of the washing machine and away from the clothes.
[3] Which colour of light shows maximum deviation when passed through a prism?
A.
Red
B.
Green
C.
Violet
D.
Yellow
Ans:
Violet
Explanation :
When passed through a prism violet colour of light shows maximum deviation. As white light passes through a prism, the violet component, having the minimum wave length observes the maximum refractive index for the prism and, thus, gets deviated to the maximum extent.
[4] Which one of the following is called a red planet?
A.
Venus
B.
Mercury
C.
Mars
D.
Jupiter
Ans:
Mars
Explanation :
Mars is the fourth planet from the Sun and the second smallest planet in the Solar System. Named after the Roman god of war, it is often described as the “Red Planet”, as the iron oxide prevalent on its surface gives it a reddish appearance. Mars is a terrestrial planet with a thin atmosphere, having surface features reminiscent both of the impact craters of the Moon and the volcanoes, valleys, deserts, and polar ice caps of Earth.
[5] Which of the following is the unit of distance in navigation?
A.
Knot
B.
Nautical mile
C.
Bar
D.
Angstrom
Ans:
Nautical mile
Explanation :
A nautical mile is based on the circumference of the earth, and is equal to one minute of latitude. It is slightly more than a statute (land measured) mile (1nautical mile = 1.1508 statute miles).
[6] The resistance of the human body (dry condition) is of the order of –
A.
10¹ Ohm
B.
10² Ohm
C.
10³ Ohm
D.
None of these
Ans:
None of these
Explanation :
The level of current passing through the human body is directly related to the resistance of its path through the body. Under dry conditions, the resistance offered by the human body may be as high as 100,000 Ohms. Wet or broken skin may drop the body’s resistance to 1,000 Ohms. (Source: The Guide to Photovoltaic System Installation by Gregory Fletcher)
[7] The sharpness of a television image is termed as its –
A.
Clarity
B.
Colour
C.
Resolution
D.
Graphics
Ans:
Resolution
Explanation :
Resolution is an umbrella term that describes the detail an image holds. The term applies to raster digital images, film images, and other types of images. The display resolution of a digital television, computer monitors or display device is the number of distinct pixels in each dimension that can be displayed.
[8] 0°K is equivalent to
A.
273°C
B.
-273°C
C.
0°C
D.
100°C
Ans:
-273°C
Explanation :
0 degrees Kelvin is equal to -273.15 degrees Celsius. It is the lowest possible temperature, at which all molecules are have the least possible amount of kinetic energy.
[9] What is the telescope designed to search for earth-size planets in the nearby region of our galaxy, termed as?
A.
Hubble telescope
B.
Kepler telescope
C.
Copernicus telescope
D.
Newton telescope
Ans:
Hubble telescope
Explanation :
The Hubble Space Telescope (HST) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation.
[10] Which law is also called the law of inertia?
A.
Newton's first law
B.
Newton's Second Law
C.
Newton's Third Law
D.
All of these
Ans:
Newton's first law
Explanation :
An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. In fact, it is the natural tendency of objects to resist changes in their state of motion.
[11] Ohm’s law obeyed in -
A.
a metallic conductor
B.
a semi conductor
C.
an electron tube
D.
in all of the above
Ans:
a metallic conductor
Explanation :
There are, however, components of electrical circuits which do not obey Ohm's law; that is, their relationship between current and voltage (their I–V curve) is nonlinear (or non-ohmic).
[12] Solar energy is due to –
A.
fusion reactions
B.
fission reactions
C.
combustion reactions
D.
chemical reactions
Ans:
fusion reactions
Explanation :
Nuclear Fusion Reaction is the process which is responsible for the sun to radiate energy in the form of light and heat commonly known as solar energy. Fusion occurs when hydrogen atoms fuse together under extreme heat and pressure to create a denser helium atom releasing, in the process, colossal amounts of energy.
[13] The plastic material commonly used for making gear wheels is –
A.
Polyesters
B.
Nylons
C.
Bakelit
D.
Polystyrene
Ans:
Nylons
Explanation :
Popular materials for plastic gears are acetal resins such as DELRIN, Duracon M90; nylon resins such as ZYTEL, NYLATRON, MC901 and acetal copolymers such as CELCON. The physical and mechanical properties of these materials vary with regard to strength, rigidity, dimensional stability, lubrication requirements, moisture absorption, etc.
[14] The nuclear force is -
A.
Short range repulsive force
B.
Short range attractive force
C.
Long range repulsive force
D.
Long range attractive force
Ans:
Short range attractive force
Explanation :
Nuclear forces (also known as nuclear interactions or strong forces) are the forces that act between two or more nucleons. They bind protons and neutrons (“nucleons”) into atomic nuclei.
[15] The angle in which a cricket ball should be hit to travel maximum horizontal distance is :
A.
60° with horizontal
B.
45° with horizontal
C.
30° with horizontal
D.
15° with horizontal
Ans:
45° with horizontal
Explanation :
This has to do with the equation of a parabola or trajectory which is θ z = (tanθ)x - x2 2(cosθ) We can see that if the ball is fired at a 45 degree angle from the ground, the horizontal distance will be a maximum.
[16] The minimum number of geostationary satellites needed for un-interrupted global coverage is :
A.
3
B.
2
C.
4
D.
1
Ans:
2
Explanation :
In theory, 2 satellites in diametrically opposite geosynchronous orbits could cover the planet. In order for the satellites to communicate, a minimum of 3 would be needed, each at a 60 degree angle to the others. At this point, the strength and quality of coverage increases proportionally to the number of satellites.
[17] Which type of mirror is used in the head lights of vehicles?
A.
Plane mirror
B.
Concave mirror
C.
Convex mirror
D.
Parabolic mirror
Ans:
Concave mirror
Explanation :
Car head lights have concave mirrors because it collects and focuses as much as possible of the light from the bulb and send it out as a fairly tight beam in one direction only. The bulb of the head light is placed at the focal point. The reflected light is parallel and gives more visibility to the driver at night.
[18] The height of a geostationary satellite from the Earth's surface is approximately:
A.
36,000 km
B.
42,000 km
C.
30,000 km
D.
None of these
Ans:
36,000 km
Explanation :
A geostationary orbit is a circular orbit 35,786 kilometres above the Earth's equator and following the direction of the Earth's rotation. Communications satellites and weather satellites are often given geostationary orbits, so that the satellite antennas that communicate with them do not have to move to track them, but can be pointed permanently at the position in the sky where they stay.
[19] Shaving mirror is –
A.
Convex
B.
Concave
C.
Plane
D.
Parabolic
Ans:
Concave
Explanation :
Concave mirrors are used in makeup or shaving mirrors. When shaving or applying makeup, a person holds the mirror close to her face. This allows him to see an enlarged image of him face, which is helpful for applying makeup or shaving correctly.
[20] Magnifying Glass is basically a –
A.
Plano-concave lens
B.
Concave lens
C.
Convex lens
D.
Cylindrical lens
Ans:
Convex lens
Explanation :
A magnifying glass is a convex lens that is used to produce a magnified image of an object. The magnification of a magnifying glass depends upon where it is placed between the user's eye and the object being viewed, and the total distance between them.
[21] The velocity of heat radiation in vacuum is –
A.
Equal to that of light
B.
Less than that of light
C.
Greater than that of light
D.
Equal to that of sound
Ans:
Equal to that of light
Explanation :
Electrons are generally responsible for heat conduction. The phonons (vibrations of the nuclei) also play a part, depending on the temperature of the medium. It depends on the specific conductor you're using. At some point, in a vacuum, the electrons have to be excited enough to spit out photons, which are Electromagnetic radiation, which in a vacuum should go on forever at the speed of light theoretically.
[22] Which of the following is the best conductor of electricity?
A.
Ordinary water
B.
Sea water
C.
Boiled water
D.
Distilled water
Ans:
Sea water
Explanation :
Sea water is a "good" conductor. It has a resistance and resistance increases by distance. So if you dip a very high voltage electric wire in the ocean, the area around it (even 100 meters or more based on how high it is) gets electric.
[23] Which of the following colours has got the maximum refractive index for glass?
A.
Blue
B.
Green
C.
Red
D.
Indigo
Ans:
Red
Explanation :
0
[24] The working principle of a washing machine is :
A.
centrifugation
B.
dialysis
C.
reverse osmosis
D.
diffusion
Ans:
centrifugation
Explanation :
The working of the washing machine is quite high tech, and includes a set sequence of washing, rinsing, and spinning (plus a pre-wash if desired).
[25] The hydraulic brake used in automobiles is a direct application of -
A.
Archimedes principle
B.
Torricellean law
C.
Bernoulli's Theorem
D.
Pascal's law
Ans:
Pascal's law
Explanation :
Pascal's law basically states that any pressure applied to a fluid inside a closed system will transm it that pressure equally in all directions throughout the fluid.
Explanation :
When passed through a prism violet colour of light shows maximum deviation. As white light passes through a prism, the violet component, having the minimum wave length observes the maximum refractive index for the prism and, thus, gets deviated to the maximum extent.
[4] Which one of the following is called a red planet?
A.
Venus
B.
Mercury
C.
Mars
D.
Jupiter
Ans:
Mars
Explanation :
Mars is the fourth planet from the Sun and the second smallest planet in the Solar System. Named after the Roman god of war, it is often described as the “Red Planet”, as the iron oxide prevalent on its surface gives it a reddish appearance. Mars is a terrestrial planet with a thin atmosphere, having surface features reminiscent both of the impact craters of the Moon and the volcanoes, valleys, deserts, and polar ice caps of Earth.
[5] Which of the following is the unit of distance in navigation?
A.
Knot
B.
Nautical mile
C.
Bar
D.
Angstrom
Ans:
Nautical mile
Explanation :
A nautical mile is based on the circumference of the earth, and is equal to one minute of latitude. It is slightly more than a statute (land measured) mile (1nautical mile = 1.1508 statute miles).
[6] The resistance of the human body (dry condition) is of the order of –
A.
10¹ Ohm
B.
10² Ohm
C.
10³ Ohm
D.
None of these
Ans:
None of these
Explanation :
The level of current passing through the human body is directly related to the resistance of its path through the body. Under dry conditions, the resistance offered by the human body may be as high as 100,000 Ohms. Wet or broken skin may drop the body’s resistance to 1,000 Ohms. (Source: The Guide to Photovoltaic System Installation by Gregory Fletcher)
[7] The sharpness of a television image is termed as its –
A.
Clarity
B.
Colour
C.
Resolution
D.
Graphics
Ans:
Resolution
Explanation :
Resolution is an umbrella term that describes the detail an image holds. The term applies to raster digital images, film images, and other types of images. The display resolution of a digital television, computer monitors or display device is the number of distinct pixels in each dimension that can be displayed.
[8] 0°K is equivalent to
A.
273°C
B.
-273°C
C.
0°C
D.
100°C
Ans:
-273°C
Explanation :
0 degrees Kelvin is equal to -273.15 degrees Celsius. It is the lowest possible temperature, at which all molecules are have the least possible amount of kinetic energy.
[9] What is the telescope designed to search for earth-size planets in the nearby region of our galaxy, termed as?
A.
Hubble telescope
B.
Kepler telescope
C.
Copernicus telescope
D.
Newton telescope
Ans:
Hubble telescope
Explanation :
The Hubble Space Telescope (HST) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation.
[10] Which law is also called the law of inertia?
A.
Newton's first law
B.
Newton's Second Law
C.
Newton's Third Law
D.
All of these
Ans:
Newton's first law
Explanation :
An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. In fact, it is the natural tendency of objects to resist changes in their state of motion.
[11] Ohm’s law obeyed in -
A.
a metallic conductor
B.
a semi conductor
C.
an electron tube
D.
in all of the above
Ans:
a metallic conductor
Explanation :
There are, however, components of electrical circuits which do not obey Ohm's law; that is, their relationship between current and voltage (their I–V curve) is nonlinear (or non-ohmic).
[12] Solar energy is due to –
A.
fusion reactions
B.
fission reactions
C.
combustion reactions
D.
chemical reactions
Ans:
fusion reactions
Explanation :
Nuclear Fusion Reaction is the process which is responsible for the sun to radiate energy in the form of light and heat commonly known as solar energy. Fusion occurs when hydrogen atoms fuse together under extreme heat and pressure to create a denser helium atom releasing, in the process, colossal amounts of energy.
[13] The plastic material commonly used for making gear wheels is –
A.
Polyesters
B.
Nylons
C.
Bakelit
D.
Polystyrene
Ans:
Nylons
Explanation :
Popular materials for plastic gears are acetal resins such as DELRIN, Duracon M90; nylon resins such as ZYTEL, NYLATRON, MC901 and acetal copolymers such as CELCON. The physical and mechanical properties of these materials vary with regard to strength, rigidity, dimensional stability, lubrication requirements, moisture absorption, etc.
[14] The nuclear force is -
A.
Short range repulsive force
B.
Short range attractive force
C.
Long range repulsive force
D.
Long range attractive force
Ans:
Short range attractive force
Explanation :
Nuclear forces (also known as nuclear interactions or strong forces) are the forces that act between two or more nucleons. They bind protons and neutrons (“nucleons”) into atomic nuclei.
[15] The angle in which a cricket ball should be hit to travel maximum horizontal distance is :
A.
60° with horizontal
B.
45° with horizontal
C.
30° with horizontal
D.
15° with horizontal
Ans:
45° with horizontal
Explanation :
This has to do with the equation of a parabola or trajectory which is θ z = (tanθ)x - x2 2(cosθ) We can see that if the ball is fired at a 45 degree angle from the ground, the horizontal distance will be a maximum.
[16] The minimum number of geostationary satellites needed for un-interrupted global coverage is :
A.
3
B.
2
C.
4
D.
1
Ans:
2
Explanation :
In theory, 2 satellites in diametrically opposite geosynchronous orbits could cover the planet. In order for the satellites to communicate, a minimum of 3 would be needed, each at a 60 degree angle to the others. At this point, the strength and quality of coverage increases proportionally to the number of satellites.
[17] Which type of mirror is used in the head lights of vehicles?
A.
Plane mirror
B.
Concave mirror
C.
Convex mirror
D.
Parabolic mirror
Ans:
Concave mirror
Explanation :
Car head lights have concave mirrors because it collects and focuses as much as possible of the light from the bulb and send it out as a fairly tight beam in one direction only. The bulb of the head light is placed at the focal point. The reflected light is parallel and gives more visibility to the driver at night.
[18] The height of a geostationary satellite from the Earth's surface is approximately:
A.
36,000 km
B.
42,000 km
C.
30,000 km
D.
None of these
Ans:
36,000 km
Explanation :
A geostationary orbit is a circular orbit 35,786 kilometres above the Earth's equator and following the direction of the Earth's rotation. Communications satellites and weather satellites are often given geostationary orbits, so that the satellite antennas that communicate with them do not have to move to track them, but can be pointed permanently at the position in the sky where they stay.
[19] Shaving mirror is –
A.
Convex
B.
Concave
C.
Plane
D.
Parabolic
Ans:
Concave
Explanation :
Concave mirrors are used in makeup or shaving mirrors. When shaving or applying makeup, a person holds the mirror close to her face. This allows him to see an enlarged image of him face, which is helpful for applying makeup or shaving correctly.
[20] Magnifying Glass is basically a –
A.
Plano-concave lens
B.
Concave lens
C.
Convex lens
D.
Cylindrical lens
Ans:
Convex lens
Explanation :
A magnifying glass is a convex lens that is used to produce a magnified image of an object. The magnification of a magnifying glass depends upon where it is placed between the user's eye and the object being viewed, and the total distance between them.
[21] The velocity of heat radiation in vacuum is –
A.
Equal to that of light
B.
Less than that of light
C.
Greater than that of light
D.
Equal to that of sound
Ans:
Equal to that of light
Explanation :
Electrons are generally responsible for heat conduction. The phonons (vibrations of the nuclei) also play a part, depending on the temperature of the medium. It depends on the specific conductor you're using. At some point, in a vacuum, the electrons have to be excited enough to spit out photons, which are Electromagnetic radiation, which in a vacuum should go on forever at the speed of light theoretically.
[22] Which of the following is the best conductor of electricity?
A.
Ordinary water
B.
Sea water
C.
Boiled water
D.
Distilled water
Ans:
Sea water
Explanation :
Sea water is a "good" conductor. It has a resistance and resistance increases by distance. So if you dip a very high voltage electric wire in the ocean, the area around it (even 100 meters or more based on how high it is) gets electric.
[23] Which of the following colours has got the maximum refractive index for glass?
A.
Blue
B.
Green
C.
Red
D.
Indigo
Ans:
Red
Explanation :
0
[24] The working principle of a washing machine is :
A.
centrifugation
B.
dialysis
C.
reverse osmosis
D.
diffusion
Ans:
centrifugation
Explanation :
The working of the washing machine is quite high tech, and includes a set sequence of washing, rinsing, and spinning (plus a pre-wash if desired).
[25] The hydraulic brake used in automobiles is a direct application of -
A.
Archimedes principle
B.
Torricellean law
C.
Bernoulli's Theorem
D.
Pascal's law
Ans:
Pascal's law
Explanation :
Pascal's law basically states that any pressure applied to a fluid inside a closed system will transm it that pressure equally in all directions throughout the fluid.
Explanation :
A nautical mile is based on the circumference of the earth, and is equal to one minute of latitude. It is slightly more than a statute (land measured) mile (1nautical mile = 1.1508 statute miles).
[6] The resistance of the human body (dry condition) is of the order of –
A.
10¹ Ohm
B.
10² Ohm
C.
10³ Ohm
D.
None of these
Ans:
None of these
Explanation :
The level of current passing through the human body is directly related to the resistance of its path through the body. Under dry conditions, the resistance offered by the human body may be as high as 100,000 Ohms. Wet or broken skin may drop the body’s resistance to 1,000 Ohms. (Source: The Guide to Photovoltaic System Installation by Gregory Fletcher)
[7] The sharpness of a television image is termed as its –
A.
Clarity
B.
Colour
C.
Resolution
D.
Graphics
Ans:
Resolution
Explanation :
Resolution is an umbrella term that describes the detail an image holds. The term applies to raster digital images, film images, and other types of images. The display resolution of a digital television, computer monitors or display device is the number of distinct pixels in each dimension that can be displayed.
[8] 0°K is equivalent to
A.
273°C
B.
-273°C
C.
0°C
D.
100°C
Ans:
-273°C
Explanation :
0 degrees Kelvin is equal to -273.15 degrees Celsius. It is the lowest possible temperature, at which all molecules are have the least possible amount of kinetic energy.
[9] What is the telescope designed to search for earth-size planets in the nearby region of our galaxy, termed as?
A.
Hubble telescope
B.
Kepler telescope
C.
Copernicus telescope
D.
Newton telescope
Ans:
Hubble telescope
Explanation :
The Hubble Space Telescope (HST) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation.
[10] Which law is also called the law of inertia?
A.
Newton's first law
B.
Newton's Second Law
C.
Newton's Third Law
D.
All of these
Ans:
Newton's first law
Explanation :
An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. In fact, it is the natural tendency of objects to resist changes in their state of motion.
[11] Ohm’s law obeyed in -
A.
a metallic conductor
B.
a semi conductor
C.
an electron tube
D.
in all of the above
Ans:
a metallic conductor
Explanation :
There are, however, components of electrical circuits which do not obey Ohm's law; that is, their relationship between current and voltage (their I–V curve) is nonlinear (or non-ohmic).
[12] Solar energy is due to –
A.
fusion reactions
B.
fission reactions
C.
combustion reactions
D.
chemical reactions
Ans:
fusion reactions
Explanation :
Nuclear Fusion Reaction is the process which is responsible for the sun to radiate energy in the form of light and heat commonly known as solar energy. Fusion occurs when hydrogen atoms fuse together under extreme heat and pressure to create a denser helium atom releasing, in the process, colossal amounts of energy.
[13] The plastic material commonly used for making gear wheels is –
A.
Polyesters
B.
Nylons
C.
Bakelit
D.
Polystyrene
Ans:
Nylons
Explanation :
Popular materials for plastic gears are acetal resins such as DELRIN, Duracon M90; nylon resins such as ZYTEL, NYLATRON, MC901 and acetal copolymers such as CELCON. The physical and mechanical properties of these materials vary with regard to strength, rigidity, dimensional stability, lubrication requirements, moisture absorption, etc.
[14] The nuclear force is -
A.
Short range repulsive force
B.
Short range attractive force
C.
Long range repulsive force
D.
Long range attractive force
Ans:
Short range attractive force
Explanation :
Nuclear forces (also known as nuclear interactions or strong forces) are the forces that act between two or more nucleons. They bind protons and neutrons (“nucleons”) into atomic nuclei.
[15] The angle in which a cricket ball should be hit to travel maximum horizontal distance is :
A.
60° with horizontal
B.
45° with horizontal
C.
30° with horizontal
D.
15° with horizontal
Ans:
45° with horizontal
Explanation :
This has to do with the equation of a parabola or trajectory which is θ z = (tanθ)x - x2 2(cosθ) We can see that if the ball is fired at a 45 degree angle from the ground, the horizontal distance will be a maximum.
[16] The minimum number of geostationary satellites needed for un-interrupted global coverage is :
A.
3
B.
2
C.
4
D.
1
Ans:
2
Explanation :
In theory, 2 satellites in diametrically opposite geosynchronous orbits could cover the planet. In order for the satellites to communicate, a minimum of 3 would be needed, each at a 60 degree angle to the others. At this point, the strength and quality of coverage increases proportionally to the number of satellites.
[17] Which type of mirror is used in the head lights of vehicles?
A.
Plane mirror
B.
Concave mirror
C.
Convex mirror
D.
Parabolic mirror
Ans:
Concave mirror
Explanation :
Car head lights have concave mirrors because it collects and focuses as much as possible of the light from the bulb and send it out as a fairly tight beam in one direction only. The bulb of the head light is placed at the focal point. The reflected light is parallel and gives more visibility to the driver at night.
[18] The height of a geostationary satellite from the Earth's surface is approximately:
A.
36,000 km
B.
42,000 km
C.
30,000 km
D.
None of these
Ans:
36,000 km
Explanation :
A geostationary orbit is a circular orbit 35,786 kilometres above the Earth's equator and following the direction of the Earth's rotation. Communications satellites and weather satellites are often given geostationary orbits, so that the satellite antennas that communicate with them do not have to move to track them, but can be pointed permanently at the position in the sky where they stay.
[19] Shaving mirror is –
A.
Convex
B.
Concave
C.
Plane
D.
Parabolic
Ans:
Concave
Explanation :
Concave mirrors are used in makeup or shaving mirrors. When shaving or applying makeup, a person holds the mirror close to her face. This allows him to see an enlarged image of him face, which is helpful for applying makeup or shaving correctly.
[20] Magnifying Glass is basically a –
A.
Plano-concave lens
B.
Concave lens
C.
Convex lens
D.
Cylindrical lens
Ans:
Convex lens
Explanation :
A magnifying glass is a convex lens that is used to produce a magnified image of an object. The magnification of a magnifying glass depends upon where it is placed between the user's eye and the object being viewed, and the total distance between them.
[21] The velocity of heat radiation in vacuum is –
A.
Equal to that of light
B.
Less than that of light
C.
Greater than that of light
D.
Equal to that of sound
Ans:
Equal to that of light
Explanation :
Electrons are generally responsible for heat conduction. The phonons (vibrations of the nuclei) also play a part, depending on the temperature of the medium. It depends on the specific conductor you're using. At some point, in a vacuum, the electrons have to be excited enough to spit out photons, which are Electromagnetic radiation, which in a vacuum should go on forever at the speed of light theoretically.
[22] Which of the following is the best conductor of electricity?
A.
Ordinary water
B.
Sea water
C.
Boiled water
D.
Distilled water
Ans:
Sea water
Explanation :
Sea water is a "good" conductor. It has a resistance and resistance increases by distance. So if you dip a very high voltage electric wire in the ocean, the area around it (even 100 meters or more based on how high it is) gets electric.
[23] Which of the following colours has got the maximum refractive index for glass?
A.
Blue
B.
Green
C.
Red
D.
Indigo
Ans:
Red
Explanation :
0
[24] The working principle of a washing machine is :
A.
centrifugation
B.
dialysis
C.
reverse osmosis
D.
diffusion
Ans:
centrifugation
Explanation :
The working of the washing machine is quite high tech, and includes a set sequence of washing, rinsing, and spinning (plus a pre-wash if desired).
[25] The hydraulic brake used in automobiles is a direct application of -
A.
Archimedes principle
B.
Torricellean law
C.
Bernoulli's Theorem
D.
Pascal's law
Ans:
Pascal's law
Explanation :
Pascal's law basically states that any pressure applied to a fluid inside a closed system will transm it that pressure equally in all directions throughout the fluid.
Explanation :
Resolution is an umbrella term that describes the detail an image holds. The term applies to raster digital images, film images, and other types of images. The display resolution of a digital television, computer monitors or display device is the number of distinct pixels in each dimension that can be displayed.
[8] 0°K is equivalent to
A.
273°C
B.
-273°C
C.
0°C
D.
100°C
Ans:
-273°C
Explanation :
0 degrees Kelvin is equal to -273.15 degrees Celsius. It is the lowest possible temperature, at which all molecules are have the least possible amount of kinetic energy.
[9] What is the telescope designed to search for earth-size planets in the nearby region of our galaxy, termed as?
A.
Hubble telescope
B.
Kepler telescope
C.
Copernicus telescope
D.
Newton telescope
Ans:
Hubble telescope
Explanation :
The Hubble Space Telescope (HST) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation.
[10] Which law is also called the law of inertia?
A.
Newton's first law
B.
Newton's Second Law
C.
Newton's Third Law
D.
All of these
Ans:
Newton's first law
Explanation :
An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. In fact, it is the natural tendency of objects to resist changes in their state of motion.
[11] Ohm’s law obeyed in -
A.
a metallic conductor
B.
a semi conductor
C.
an electron tube
D.
in all of the above
Ans:
a metallic conductor
Explanation :
There are, however, components of electrical circuits which do not obey Ohm's law; that is, their relationship between current and voltage (their I–V curve) is nonlinear (or non-ohmic).
[12] Solar energy is due to –
A.
fusion reactions
B.
fission reactions
C.
combustion reactions
D.
chemical reactions
Ans:
fusion reactions
Explanation :
Nuclear Fusion Reaction is the process which is responsible for the sun to radiate energy in the form of light and heat commonly known as solar energy. Fusion occurs when hydrogen atoms fuse together under extreme heat and pressure to create a denser helium atom releasing, in the process, colossal amounts of energy.
[13] The plastic material commonly used for making gear wheels is –
A.
Polyesters
B.
Nylons
C.
Bakelit
D.
Polystyrene
Ans:
Nylons
Explanation :
Popular materials for plastic gears are acetal resins such as DELRIN, Duracon M90; nylon resins such as ZYTEL, NYLATRON, MC901 and acetal copolymers such as CELCON. The physical and mechanical properties of these materials vary with regard to strength, rigidity, dimensional stability, lubrication requirements, moisture absorption, etc.
[14] The nuclear force is -
A.
Short range repulsive force
B.
Short range attractive force
C.
Long range repulsive force
D.
Long range attractive force
Ans:
Short range attractive force
Explanation :
Nuclear forces (also known as nuclear interactions or strong forces) are the forces that act between two or more nucleons. They bind protons and neutrons (“nucleons”) into atomic nuclei.
[15] The angle in which a cricket ball should be hit to travel maximum horizontal distance is :
A.
60° with horizontal
B.
45° with horizontal
C.
30° with horizontal
D.
15° with horizontal
Ans:
45° with horizontal
Explanation :
This has to do with the equation of a parabola or trajectory which is θ z = (tanθ)x - x2 2(cosθ) We can see that if the ball is fired at a 45 degree angle from the ground, the horizontal distance will be a maximum.
[16] The minimum number of geostationary satellites needed for un-interrupted global coverage is :
A.
3
B.
2
C.
4
D.
1
Ans:
2
Explanation :
In theory, 2 satellites in diametrically opposite geosynchronous orbits could cover the planet. In order for the satellites to communicate, a minimum of 3 would be needed, each at a 60 degree angle to the others. At this point, the strength and quality of coverage increases proportionally to the number of satellites.
[17] Which type of mirror is used in the head lights of vehicles?
A.
Plane mirror
B.
Concave mirror
C.
Convex mirror
D.
Parabolic mirror
Ans:
Concave mirror
Explanation :
Car head lights have concave mirrors because it collects and focuses as much as possible of the light from the bulb and send it out as a fairly tight beam in one direction only. The bulb of the head light is placed at the focal point. The reflected light is parallel and gives more visibility to the driver at night.
[18] The height of a geostationary satellite from the Earth's surface is approximately:
A.
36,000 km
B.
42,000 km
C.
30,000 km
D.
None of these
Ans:
36,000 km
Explanation :
A geostationary orbit is a circular orbit 35,786 kilometres above the Earth's equator and following the direction of the Earth's rotation. Communications satellites and weather satellites are often given geostationary orbits, so that the satellite antennas that communicate with them do not have to move to track them, but can be pointed permanently at the position in the sky where they stay.
[19] Shaving mirror is –
A.
Convex
B.
Concave
C.
Plane
D.
Parabolic
Ans:
Concave
Explanation :
Concave mirrors are used in makeup or shaving mirrors. When shaving or applying makeup, a person holds the mirror close to her face. This allows him to see an enlarged image of him face, which is helpful for applying makeup or shaving correctly.
[20] Magnifying Glass is basically a –
A.
Plano-concave lens
B.
Concave lens
C.
Convex lens
D.
Cylindrical lens
Ans:
Convex lens
Explanation :
A magnifying glass is a convex lens that is used to produce a magnified image of an object. The magnification of a magnifying glass depends upon where it is placed between the user's eye and the object being viewed, and the total distance between them.
[21] The velocity of heat radiation in vacuum is –
A.
Equal to that of light
B.
Less than that of light
C.
Greater than that of light
D.
Equal to that of sound
Ans:
Equal to that of light
Explanation :
Electrons are generally responsible for heat conduction. The phonons (vibrations of the nuclei) also play a part, depending on the temperature of the medium. It depends on the specific conductor you're using. At some point, in a vacuum, the electrons have to be excited enough to spit out photons, which are Electromagnetic radiation, which in a vacuum should go on forever at the speed of light theoretically.
[22] Which of the following is the best conductor of electricity?
A.
Ordinary water
B.
Sea water
C.
Boiled water
D.
Distilled water
Ans:
Sea water
Explanation :
Sea water is a "good" conductor. It has a resistance and resistance increases by distance. So if you dip a very high voltage electric wire in the ocean, the area around it (even 100 meters or more based on how high it is) gets electric.
[23] Which of the following colours has got the maximum refractive index for glass?
A.
Blue
B.
Green
C.
Red
D.
Indigo
Ans:
Red
Explanation :
0
[24] The working principle of a washing machine is :
A.
centrifugation
B.
dialysis
C.
reverse osmosis
D.
diffusion
Ans:
centrifugation
Explanation :
The working of the washing machine is quite high tech, and includes a set sequence of washing, rinsing, and spinning (plus a pre-wash if desired).
[25] The hydraulic brake used in automobiles is a direct application of -
A.
Archimedes principle
B.
Torricellean law
C.
Bernoulli's Theorem
D.
Pascal's law
Ans:
Pascal's law
Explanation :
Pascal's law basically states that any pressure applied to a fluid inside a closed system will transm it that pressure equally in all directions throughout the fluid.
Explanation :
The Hubble Space Telescope (HST) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation.
[10] Which law is also called the law of inertia?
A.
Newton's first law
B.
Newton's Second Law
C.
Newton's Third Law
D.
All of these
Ans:
Newton's first law
Explanation :
An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. In fact, it is the natural tendency of objects to resist changes in their state of motion.
[11] Ohm’s law obeyed in -
A.
a metallic conductor
B.
a semi conductor
C.
an electron tube
D.
in all of the above
Ans:
a metallic conductor
Explanation :
There are, however, components of electrical circuits which do not obey Ohm's law; that is, their relationship between current and voltage (their I–V curve) is nonlinear (or non-ohmic).
[12] Solar energy is due to –
A.
fusion reactions
B.
fission reactions
C.
combustion reactions
D.
chemical reactions
Ans:
fusion reactions
Explanation :
Nuclear Fusion Reaction is the process which is responsible for the sun to radiate energy in the form of light and heat commonly known as solar energy. Fusion occurs when hydrogen atoms fuse together under extreme heat and pressure to create a denser helium atom releasing, in the process, colossal amounts of energy.
[13] The plastic material commonly used for making gear wheels is –
A.
Polyesters
B.
Nylons
C.
Bakelit
D.
Polystyrene
Ans:
Nylons
Explanation :
Popular materials for plastic gears are acetal resins such as DELRIN, Duracon M90; nylon resins such as ZYTEL, NYLATRON, MC901 and acetal copolymers such as CELCON. The physical and mechanical properties of these materials vary with regard to strength, rigidity, dimensional stability, lubrication requirements, moisture absorption, etc.
[14] The nuclear force is -
A.
Short range repulsive force
B.
Short range attractive force
C.
Long range repulsive force
D.
Long range attractive force
Ans:
Short range attractive force
Explanation :
Nuclear forces (also known as nuclear interactions or strong forces) are the forces that act between two or more nucleons. They bind protons and neutrons (“nucleons”) into atomic nuclei.
[15] The angle in which a cricket ball should be hit to travel maximum horizontal distance is :
A.
60° with horizontal
B.
45° with horizontal
C.
30° with horizontal
D.
15° with horizontal
Ans:
45° with horizontal
Explanation :
This has to do with the equation of a parabola or trajectory which is θ z = (tanθ)x - x2 2(cosθ) We can see that if the ball is fired at a 45 degree angle from the ground, the horizontal distance will be a maximum.
[16] The minimum number of geostationary satellites needed for un-interrupted global coverage is :
A.
3
B.
2
C.
4
D.
1
Ans:
2
Explanation :
In theory, 2 satellites in diametrically opposite geosynchronous orbits could cover the planet. In order for the satellites to communicate, a minimum of 3 would be needed, each at a 60 degree angle to the others. At this point, the strength and quality of coverage increases proportionally to the number of satellites.
[17] Which type of mirror is used in the head lights of vehicles?
A.
Plane mirror
B.
Concave mirror
C.
Convex mirror
D.
Parabolic mirror
Ans:
Concave mirror
Explanation :
Car head lights have concave mirrors because it collects and focuses as much as possible of the light from the bulb and send it out as a fairly tight beam in one direction only. The bulb of the head light is placed at the focal point. The reflected light is parallel and gives more visibility to the driver at night.
[18] The height of a geostationary satellite from the Earth's surface is approximately:
A.
36,000 km
B.
42,000 km
C.
30,000 km
D.
None of these
Ans:
36,000 km
Explanation :
A geostationary orbit is a circular orbit 35,786 kilometres above the Earth's equator and following the direction of the Earth's rotation. Communications satellites and weather satellites are often given geostationary orbits, so that the satellite antennas that communicate with them do not have to move to track them, but can be pointed permanently at the position in the sky where they stay.
[19] Shaving mirror is –
A.
Convex
B.
Concave
C.
Plane
D.
Parabolic
Ans:
Concave
Explanation :
Concave mirrors are used in makeup or shaving mirrors. When shaving or applying makeup, a person holds the mirror close to her face. This allows him to see an enlarged image of him face, which is helpful for applying makeup or shaving correctly.
[20] Magnifying Glass is basically a –
A.
Plano-concave lens
B.
Concave lens
C.
Convex lens
D.
Cylindrical lens
Ans:
Convex lens
Explanation :
A magnifying glass is a convex lens that is used to produce a magnified image of an object. The magnification of a magnifying glass depends upon where it is placed between the user's eye and the object being viewed, and the total distance between them.
[21] The velocity of heat radiation in vacuum is –
A.
Equal to that of light
B.
Less than that of light
C.
Greater than that of light
D.
Equal to that of sound
Ans:
Equal to that of light
Explanation :
Electrons are generally responsible for heat conduction. The phonons (vibrations of the nuclei) also play a part, depending on the temperature of the medium. It depends on the specific conductor you're using. At some point, in a vacuum, the electrons have to be excited enough to spit out photons, which are Electromagnetic radiation, which in a vacuum should go on forever at the speed of light theoretically.
[22] Which of the following is the best conductor of electricity?
A.
Ordinary water
B.
Sea water
C.
Boiled water
D.
Distilled water
Ans:
Sea water
Explanation :
Sea water is a "good" conductor. It has a resistance and resistance increases by distance. So if you dip a very high voltage electric wire in the ocean, the area around it (even 100 meters or more based on how high it is) gets electric.
[23] Which of the following colours has got the maximum refractive index for glass?
A.
Blue
B.
Green
C.
Red
D.
Indigo
Ans:
Red
Explanation :
0
[24] The working principle of a washing machine is :
A.
centrifugation
B.
dialysis
C.
reverse osmosis
D.
diffusion
Ans:
centrifugation
Explanation :
The working of the washing machine is quite high tech, and includes a set sequence of washing, rinsing, and spinning (plus a pre-wash if desired).
[25] The hydraulic brake used in automobiles is a direct application of -
A.
Archimedes principle
B.
Torricellean law
C.
Bernoulli's Theorem
D.
Pascal's law
Ans:
Pascal's law
Explanation :
Pascal's law basically states that any pressure applied to a fluid inside a closed system will transm it that pressure equally in all directions throughout the fluid.
Explanation :
There are, however, components of electrical circuits which do not obey Ohm's law; that is, their relationship between current and voltage (their I–V curve) is nonlinear (or non-ohmic).
[12] Solar energy is due to –
A.
fusion reactions
B.
fission reactions
C.
combustion reactions
D.
chemical reactions
Ans:
fusion reactions
Explanation :
Nuclear Fusion Reaction is the process which is responsible for the sun to radiate energy in the form of light and heat commonly known as solar energy. Fusion occurs when hydrogen atoms fuse together under extreme heat and pressure to create a denser helium atom releasing, in the process, colossal amounts of energy.
[13] The plastic material commonly used for making gear wheels is –
A.
Polyesters
B.
Nylons
C.
Bakelit
D.
Polystyrene
Ans:
Nylons
Explanation :
Popular materials for plastic gears are acetal resins such as DELRIN, Duracon M90; nylon resins such as ZYTEL, NYLATRON, MC901 and acetal copolymers such as CELCON. The physical and mechanical properties of these materials vary with regard to strength, rigidity, dimensional stability, lubrication requirements, moisture absorption, etc.
[14] The nuclear force is -
A.
Short range repulsive force
B.
Short range attractive force
C.
Long range repulsive force
D.
Long range attractive force
Ans:
Short range attractive force
Explanation :
Nuclear forces (also known as nuclear interactions or strong forces) are the forces that act between two or more nucleons. They bind protons and neutrons (“nucleons”) into atomic nuclei.
[15] The angle in which a cricket ball should be hit to travel maximum horizontal distance is :
A.
60° with horizontal
B.
45° with horizontal
C.
30° with horizontal
D.
15° with horizontal
Ans:
45° with horizontal
Explanation :
This has to do with the equation of a parabola or trajectory which is θ z = (tanθ)x - x2 2(cosθ) We can see that if the ball is fired at a 45 degree angle from the ground, the horizontal distance will be a maximum.
[16] The minimum number of geostationary satellites needed for un-interrupted global coverage is :
A.
3
B.
2
C.
4
D.
1
Ans:
2
Explanation :
In theory, 2 satellites in diametrically opposite geosynchronous orbits could cover the planet. In order for the satellites to communicate, a minimum of 3 would be needed, each at a 60 degree angle to the others. At this point, the strength and quality of coverage increases proportionally to the number of satellites.
[17] Which type of mirror is used in the head lights of vehicles?
A.
Plane mirror
B.
Concave mirror
C.
Convex mirror
D.
Parabolic mirror
Ans:
Concave mirror
Explanation :
Car head lights have concave mirrors because it collects and focuses as much as possible of the light from the bulb and send it out as a fairly tight beam in one direction only. The bulb of the head light is placed at the focal point. The reflected light is parallel and gives more visibility to the driver at night.
[18] The height of a geostationary satellite from the Earth's surface is approximately:
A.
36,000 km
B.
42,000 km
C.
30,000 km
D.
None of these
Ans:
36,000 km
Explanation :
A geostationary orbit is a circular orbit 35,786 kilometres above the Earth's equator and following the direction of the Earth's rotation. Communications satellites and weather satellites are often given geostationary orbits, so that the satellite antennas that communicate with them do not have to move to track them, but can be pointed permanently at the position in the sky where they stay.
[19] Shaving mirror is –
A.
Convex
B.
Concave
C.
Plane
D.
Parabolic
Ans:
Concave
Explanation :
Concave mirrors are used in makeup or shaving mirrors. When shaving or applying makeup, a person holds the mirror close to her face. This allows him to see an enlarged image of him face, which is helpful for applying makeup or shaving correctly.
[20] Magnifying Glass is basically a –
A.
Plano-concave lens
B.
Concave lens
C.
Convex lens
D.
Cylindrical lens
Ans:
Convex lens
Explanation :
A magnifying glass is a convex lens that is used to produce a magnified image of an object. The magnification of a magnifying glass depends upon where it is placed between the user's eye and the object being viewed, and the total distance between them.
[21] The velocity of heat radiation in vacuum is –
A.
Equal to that of light
B.
Less than that of light
C.
Greater than that of light
D.
Equal to that of sound
Ans:
Equal to that of light
Explanation :
Electrons are generally responsible for heat conduction. The phonons (vibrations of the nuclei) also play a part, depending on the temperature of the medium. It depends on the specific conductor you're using. At some point, in a vacuum, the electrons have to be excited enough to spit out photons, which are Electromagnetic radiation, which in a vacuum should go on forever at the speed of light theoretically.
[22] Which of the following is the best conductor of electricity?
A.
Ordinary water
B.
Sea water
C.
Boiled water
D.
Distilled water
Ans:
Sea water
Explanation :
Sea water is a "good" conductor. It has a resistance and resistance increases by distance. So if you dip a very high voltage electric wire in the ocean, the area around it (even 100 meters or more based on how high it is) gets electric.
[23] Which of the following colours has got the maximum refractive index for glass?
A.
Blue
B.
Green
C.
Red
D.
Indigo
Ans:
Red
Explanation :
0
[24] The working principle of a washing machine is :
A.
centrifugation
B.
dialysis
C.
reverse osmosis
D.
diffusion
Ans:
centrifugation
Explanation :
The working of the washing machine is quite high tech, and includes a set sequence of washing, rinsing, and spinning (plus a pre-wash if desired).
[25] The hydraulic brake used in automobiles is a direct application of -
A.
Archimedes principle
B.
Torricellean law
C.
Bernoulli's Theorem
D.
Pascal's law
Ans:
Pascal's law
Explanation :
Pascal's law basically states that any pressure applied to a fluid inside a closed system will transm it that pressure equally in all directions throughout the fluid.
Explanation :
Popular materials for plastic gears are acetal resins such as DELRIN, Duracon M90; nylon resins such as ZYTEL, NYLATRON, MC901 and acetal copolymers such as CELCON. The physical and mechanical properties of these materials vary with regard to strength, rigidity, dimensional stability, lubrication requirements, moisture absorption, etc.
[14] The nuclear force is -
A.
Short range repulsive force
B.
Short range attractive force
C.
Long range repulsive force
D.
Long range attractive force
Ans:
Short range attractive force
Explanation :
Nuclear forces (also known as nuclear interactions or strong forces) are the forces that act between two or more nucleons. They bind protons and neutrons (“nucleons”) into atomic nuclei.
[15] The angle in which a cricket ball should be hit to travel maximum horizontal distance is :
A.
60° with horizontal
B.
45° with horizontal
C.
30° with horizontal
D.
15° with horizontal
Ans:
45° with horizontal
Explanation :
This has to do with the equation of a parabola or trajectory which is θ z = (tanθ)x - x2 2(cosθ) We can see that if the ball is fired at a 45 degree angle from the ground, the horizontal distance will be a maximum.
[16] The minimum number of geostationary satellites needed for un-interrupted global coverage is :
A.
3
B.
2
C.
4
D.
1
Ans:
2
Explanation :
In theory, 2 satellites in diametrically opposite geosynchronous orbits could cover the planet. In order for the satellites to communicate, a minimum of 3 would be needed, each at a 60 degree angle to the others. At this point, the strength and quality of coverage increases proportionally to the number of satellites.
[17] Which type of mirror is used in the head lights of vehicles?
A.
Plane mirror
B.
Concave mirror
C.
Convex mirror
D.
Parabolic mirror
Ans:
Concave mirror
Explanation :
Car head lights have concave mirrors because it collects and focuses as much as possible of the light from the bulb and send it out as a fairly tight beam in one direction only. The bulb of the head light is placed at the focal point. The reflected light is parallel and gives more visibility to the driver at night.
[18] The height of a geostationary satellite from the Earth's surface is approximately:
A.
36,000 km
B.
42,000 km
C.
30,000 km
D.
None of these
Ans:
36,000 km
Explanation :
A geostationary orbit is a circular orbit 35,786 kilometres above the Earth's equator and following the direction of the Earth's rotation. Communications satellites and weather satellites are often given geostationary orbits, so that the satellite antennas that communicate with them do not have to move to track them, but can be pointed permanently at the position in the sky where they stay.
[19] Shaving mirror is –
A.
Convex
B.
Concave
C.
Plane
D.
Parabolic
Ans:
Concave
Explanation :
Concave mirrors are used in makeup or shaving mirrors. When shaving or applying makeup, a person holds the mirror close to her face. This allows him to see an enlarged image of him face, which is helpful for applying makeup or shaving correctly.
[20] Magnifying Glass is basically a –
A.
Plano-concave lens
B.
Concave lens
C.
Convex lens
D.
Cylindrical lens
Ans:
Convex lens
Explanation :
A magnifying glass is a convex lens that is used to produce a magnified image of an object. The magnification of a magnifying glass depends upon where it is placed between the user's eye and the object being viewed, and the total distance between them.
[21] The velocity of heat radiation in vacuum is –
A.
Equal to that of light
B.
Less than that of light
C.
Greater than that of light
D.
Equal to that of sound
Ans:
Equal to that of light
Explanation :
Electrons are generally responsible for heat conduction. The phonons (vibrations of the nuclei) also play a part, depending on the temperature of the medium. It depends on the specific conductor you're using. At some point, in a vacuum, the electrons have to be excited enough to spit out photons, which are Electromagnetic radiation, which in a vacuum should go on forever at the speed of light theoretically.
[22] Which of the following is the best conductor of electricity?
A.
Ordinary water
B.
Sea water
C.
Boiled water
D.
Distilled water
Ans:
Sea water
Explanation :
Sea water is a "good" conductor. It has a resistance and resistance increases by distance. So if you dip a very high voltage electric wire in the ocean, the area around it (even 100 meters or more based on how high it is) gets electric.
[23] Which of the following colours has got the maximum refractive index for glass?
A.
Blue
B.
Green
C.
Red
D.
Indigo
Ans:
Red
Explanation :
0
[24] The working principle of a washing machine is :
A.
centrifugation
B.
dialysis
C.
reverse osmosis
D.
diffusion
Ans:
centrifugation
Explanation :
The working of the washing machine is quite high tech, and includes a set sequence of washing, rinsing, and spinning (plus a pre-wash if desired).
[25] The hydraulic brake used in automobiles is a direct application of -
A.
Archimedes principle
B.
Torricellean law
C.
Bernoulli's Theorem
D.
Pascal's law
Ans:
Pascal's law
Explanation :
Pascal's law basically states that any pressure applied to a fluid inside a closed system will transm it that pressure equally in all directions throughout the fluid.
Explanation :
This has to do with the equation of a parabola or trajectory which is θ z = (tanθ)x - x2 2(cosθ) We can see that if the ball is fired at a 45 degree angle from the ground, the horizontal distance will be a maximum.
[16] The minimum number of geostationary satellites needed for un-interrupted global coverage is :
A.
3
B.
2
C.
4
D.
1
Ans:
2
Explanation :
In theory, 2 satellites in diametrically opposite geosynchronous orbits could cover the planet. In order for the satellites to communicate, a minimum of 3 would be needed, each at a 60 degree angle to the others. At this point, the strength and quality of coverage increases proportionally to the number of satellites.
[17] Which type of mirror is used in the head lights of vehicles?
A.
Plane mirror
B.
Concave mirror
C.
Convex mirror
D.
Parabolic mirror
Ans:
Concave mirror
Explanation :
Car head lights have concave mirrors because it collects and focuses as much as possible of the light from the bulb and send it out as a fairly tight beam in one direction only. The bulb of the head light is placed at the focal point. The reflected light is parallel and gives more visibility to the driver at night.
[18] The height of a geostationary satellite from the Earth's surface is approximately:
A.
36,000 km
B.
42,000 km
C.
30,000 km
D.
None of these
Ans:
36,000 km
Explanation :
A geostationary orbit is a circular orbit 35,786 kilometres above the Earth's equator and following the direction of the Earth's rotation. Communications satellites and weather satellites are often given geostationary orbits, so that the satellite antennas that communicate with them do not have to move to track them, but can be pointed permanently at the position in the sky where they stay.
[19] Shaving mirror is –
A.
Convex
B.
Concave
C.
Plane
D.
Parabolic
Ans:
Concave
Explanation :
Concave mirrors are used in makeup or shaving mirrors. When shaving or applying makeup, a person holds the mirror close to her face. This allows him to see an enlarged image of him face, which is helpful for applying makeup or shaving correctly.
[20] Magnifying Glass is basically a –
A.
Plano-concave lens
B.
Concave lens
C.
Convex lens
D.
Cylindrical lens
Ans:
Convex lens
Explanation :
A magnifying glass is a convex lens that is used to produce a magnified image of an object. The magnification of a magnifying glass depends upon where it is placed between the user's eye and the object being viewed, and the total distance between them.
[21] The velocity of heat radiation in vacuum is –
A.
Equal to that of light
B.
Less than that of light
C.
Greater than that of light
D.
Equal to that of sound
Ans:
Equal to that of light
Explanation :
Electrons are generally responsible for heat conduction. The phonons (vibrations of the nuclei) also play a part, depending on the temperature of the medium. It depends on the specific conductor you're using. At some point, in a vacuum, the electrons have to be excited enough to spit out photons, which are Electromagnetic radiation, which in a vacuum should go on forever at the speed of light theoretically.
[22] Which of the following is the best conductor of electricity?
A.
Ordinary water
B.
Sea water
C.
Boiled water
D.
Distilled water
Ans:
Sea water
Explanation :
Sea water is a "good" conductor. It has a resistance and resistance increases by distance. So if you dip a very high voltage electric wire in the ocean, the area around it (even 100 meters or more based on how high it is) gets electric.
[23] Which of the following colours has got the maximum refractive index for glass?
A.
Blue
B.
Green
C.
Red
D.
Indigo
Ans:
Red
Explanation :
0
[24] The working principle of a washing machine is :
A.
centrifugation
B.
dialysis
C.
reverse osmosis
D.
diffusion
Ans:
centrifugation
Explanation :
The working of the washing machine is quite high tech, and includes a set sequence of washing, rinsing, and spinning (plus a pre-wash if desired).
[25] The hydraulic brake used in automobiles is a direct application of -
A.
Archimedes principle
B.
Torricellean law
C.
Bernoulli's Theorem
D.
Pascal's law
Ans:
Pascal's law
Explanation :
Pascal's law basically states that any pressure applied to a fluid inside a closed system will transm it that pressure equally in all directions throughout the fluid.
Explanation :
Car head lights have concave mirrors because it collects and focuses as much as possible of the light from the bulb and send it out as a fairly tight beam in one direction only. The bulb of the head light is placed at the focal point. The reflected light is parallel and gives more visibility to the driver at night.
[18] The height of a geostationary satellite from the Earth's surface is approximately:
A.
36,000 km
B.
42,000 km
C.
30,000 km
D.
None of these
Ans:
36,000 km
Explanation :
A geostationary orbit is a circular orbit 35,786 kilometres above the Earth's equator and following the direction of the Earth's rotation. Communications satellites and weather satellites are often given geostationary orbits, so that the satellite antennas that communicate with them do not have to move to track them, but can be pointed permanently at the position in the sky where they stay.
[19] Shaving mirror is –
A.
Convex
B.
Concave
C.
Plane
D.
Parabolic
Ans:
Concave
Explanation :
Concave mirrors are used in makeup or shaving mirrors. When shaving or applying makeup, a person holds the mirror close to her face. This allows him to see an enlarged image of him face, which is helpful for applying makeup or shaving correctly.
[20] Magnifying Glass is basically a –
A.
Plano-concave lens
B.
Concave lens
C.
Convex lens
D.
Cylindrical lens
Ans:
Convex lens
Explanation :
A magnifying glass is a convex lens that is used to produce a magnified image of an object. The magnification of a magnifying glass depends upon where it is placed between the user's eye and the object being viewed, and the total distance between them.
[21] The velocity of heat radiation in vacuum is –
A.
Equal to that of light
B.
Less than that of light
C.
Greater than that of light
D.
Equal to that of sound
Ans:
Equal to that of light
Explanation :
Electrons are generally responsible for heat conduction. The phonons (vibrations of the nuclei) also play a part, depending on the temperature of the medium. It depends on the specific conductor you're using. At some point, in a vacuum, the electrons have to be excited enough to spit out photons, which are Electromagnetic radiation, which in a vacuum should go on forever at the speed of light theoretically.
[22] Which of the following is the best conductor of electricity?
A.
Ordinary water
B.
Sea water
C.
Boiled water
D.
Distilled water
Ans:
Sea water
Explanation :
Sea water is a "good" conductor. It has a resistance and resistance increases by distance. So if you dip a very high voltage electric wire in the ocean, the area around it (even 100 meters or more based on how high it is) gets electric.
[23] Which of the following colours has got the maximum refractive index for glass?
A.
Blue
B.
Green
C.
Red
D.
Indigo
Ans:
Red
Explanation :
0
[24] The working principle of a washing machine is :
A.
centrifugation
B.
dialysis
C.
reverse osmosis
D.
diffusion
Ans:
centrifugation
Explanation :
The working of the washing machine is quite high tech, and includes a set sequence of washing, rinsing, and spinning (plus a pre-wash if desired).
[25] The hydraulic brake used in automobiles is a direct application of -
A.
Archimedes principle
B.
Torricellean law
C.
Bernoulli's Theorem
D.
Pascal's law
Ans:
Pascal's law
Explanation :
Pascal's law basically states that any pressure applied to a fluid inside a closed system will transm it that pressure equally in all directions throughout the fluid.
Explanation :
Concave mirrors are used in makeup or shaving mirrors. When shaving or applying makeup, a person holds the mirror close to her face. This allows him to see an enlarged image of him face, which is helpful for applying makeup or shaving correctly.
[20] Magnifying Glass is basically a –
A.
Plano-concave lens
B.
Concave lens
C.
Convex lens
D.
Cylindrical lens
Ans:
Convex lens
Explanation :
A magnifying glass is a convex lens that is used to produce a magnified image of an object. The magnification of a magnifying glass depends upon where it is placed between the user's eye and the object being viewed, and the total distance between them.
[21] The velocity of heat radiation in vacuum is –
A.
Equal to that of light
B.
Less than that of light
C.
Greater than that of light
D.
Equal to that of sound
Ans:
Equal to that of light
Explanation :
Electrons are generally responsible for heat conduction. The phonons (vibrations of the nuclei) also play a part, depending on the temperature of the medium. It depends on the specific conductor you're using. At some point, in a vacuum, the electrons have to be excited enough to spit out photons, which are Electromagnetic radiation, which in a vacuum should go on forever at the speed of light theoretically.
[22] Which of the following is the best conductor of electricity?
A.
Ordinary water
B.
Sea water
C.
Boiled water
D.
Distilled water
Ans:
Sea water
Explanation :
Sea water is a "good" conductor. It has a resistance and resistance increases by distance. So if you dip a very high voltage electric wire in the ocean, the area around it (even 100 meters or more based on how high it is) gets electric.
[23] Which of the following colours has got the maximum refractive index for glass?
A.
Blue
B.
Green
C.
Red
D.
Indigo
Ans:
Red
Explanation :
0
[24] The working principle of a washing machine is :
A.
centrifugation
B.
dialysis
C.
reverse osmosis
D.
diffusion
Ans:
centrifugation
Explanation :
The working of the washing machine is quite high tech, and includes a set sequence of washing, rinsing, and spinning (plus a pre-wash if desired).
[25] The hydraulic brake used in automobiles is a direct application of -
A.
Archimedes principle
B.
Torricellean law
C.
Bernoulli's Theorem
D.
Pascal's law
Ans:
Pascal's law
Explanation :
Pascal's law basically states that any pressure applied to a fluid inside a closed system will transm it that pressure equally in all directions throughout the fluid.
Explanation :
Electrons are generally responsible for heat conduction. The phonons (vibrations of the nuclei) also play a part, depending on the temperature of the medium. It depends on the specific conductor you're using. At some point, in a vacuum, the electrons have to be excited enough to spit out photons, which are Electromagnetic radiation, which in a vacuum should go on forever at the speed of light theoretically.
[22] Which of the following is the best conductor of electricity?
A.
Ordinary water
B.
Sea water
C.
Boiled water
D.
Distilled water
Ans:
Sea water
Explanation :
Sea water is a "good" conductor. It has a resistance and resistance increases by distance. So if you dip a very high voltage electric wire in the ocean, the area around it (even 100 meters or more based on how high it is) gets electric.
[23] Which of the following colours has got the maximum refractive index for glass?
A.
Blue
B.
Green
C.
Red
D.
Indigo
Ans:
Red
Explanation :
0
[24] The working principle of a washing machine is :
A.
centrifugation
B.
dialysis
C.
reverse osmosis
D.
diffusion
Ans:
centrifugation
Explanation :
The working of the washing machine is quite high tech, and includes a set sequence of washing, rinsing, and spinning (plus a pre-wash if desired).
[25] The hydraulic brake used in automobiles is a direct application of -
A.
Archimedes principle
B.
Torricellean law
C.
Bernoulli's Theorem
D.
Pascal's law
Ans:
Pascal's law
Explanation :
Pascal's law basically states that any pressure applied to a fluid inside a closed system will transm it that pressure equally in all directions throughout the fluid.
Explanation :
0
[24] The working principle of a washing machine is :
A.
centrifugation
B.
dialysis
C.
reverse osmosis
D.
diffusion
Ans:
centrifugation
Explanation :
The working of the washing machine is quite high tech, and includes a set sequence of washing, rinsing, and spinning (plus a pre-wash if desired).
[25] The hydraulic brake used in automobiles is a direct application of -
A.
Archimedes principle
B.
Torricellean law
C.
Bernoulli's Theorem
D.
Pascal's law
Ans:
Pascal's law
Explanation :
Pascal's law basically states that any pressure applied to a fluid inside a closed system will transm it that pressure equally in all directions throughout the fluid.
Explanation :
Pascal's law basically states that any pressure applied to a fluid inside a closed system will transm it that pressure equally in all directions throughout the fluid.