GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 031
301). Heavenly matter landing on the earth's surface is known as
A). meteor
B). shooting star
C). meteorite
D). UFO
Answer: meteorite
302). Which of the following has equal periods of rotation and revolution?
A). the moon
B). Mercury
C). Venus
D). Uranus
Answer: the moon
303). Artificial satellites are used for
A). TV transmission
B). detecting minerals
C). space research
D). all (a), (b) and (c)
Answer: all (a), (b) and (c)
304). Which of the following can be made to behave as a superconductor at a temperature of about 100 K?
A). Glass
B). Mercury
C). Soft iron
D). Ceramics
Answer: Ceramics
305). Weight of a person can be zero when
1. he is falling freely
2. he is orbiting in a satellite
3. he is in an aeroplane flying at a high altitude
4. he is having ride in a gas filled balloon
A). 1 and 2 are correct
B). 1 and 4 are correct
C). 1, 2 and 4 are correct
D). 1, 2, 3 and 4 are correct
Answer: 1 and 2 are correct
306). Mountain roads wind up gradually and do not go straight up, because
A). it is easier to construct winding roads
B). winding roads offer more friction making driving easier
C). on winding roads less force is needed to overcome gravity
D). chances of accidents are less on winding roads
Answer: on winding roads less force is needed to overcome gravity
307). Assertion (A): Escape velocity from the surface of the earth is slightly more at the equator than at the poles.
Reason (R): The earth is rotating and its equatorial radius is more than the polar radius.
A). Both A and R are true and R is the correct explanation of A
B). Both A and R are true but R is not a correct explanation of A
C). A is true but R is false
D). A is false but R is true
Answer: A is false but R is true
308). Assertion (A): A liquid lubricant (e.g. machine oil) increases the efficiency of a machine.
Reason (R): Viscosity of oil is less than the friction between solids.
A). Both A and R are true and R is the correct explanation of A
B). Both A and R are true but R is not a correct explanation of A
C). A is true but R is false
D). A is false but R is true
Answer: Both A and R are true and R is the correct explanation of A
309). Assertion (A): Jet engines can be used to propel vehicles into outer space.
Reason (R): let engines draw air for combustion from the atmosphere.
A). Both A and R are true and R is the correct explanation of A
B). Both A and R are true but R is not a correct explanation of A
C). A is true but R is false
D). A is false but R is true
Answer: A is false but R is true
310). For the same total weight and the same fuel supply, a multistage rocket is preferred over a single-stage rocket, because
A). it is cheaper to build a multistage rocket
B). it is easier to assemble a multistage rocket
C). multistage rocket is safer to launch
D). the final velocity achieved by a multistage rocket is higher
Answer: the final velocity achieved by a multistage rocket is higher
A). meteor
B). shooting star
C). meteorite
D). UFO
Answer: meteorite
302). Which of the following has equal periods of rotation and revolution?
A). the moon
B). Mercury
C). Venus
D). Uranus
Answer: the moon
303). Artificial satellites are used for
A). TV transmission
B). detecting minerals
C). space research
D). all (a), (b) and (c)
Answer: all (a), (b) and (c)
304). Which of the following can be made to behave as a superconductor at a temperature of about 100 K?
A). Glass
B). Mercury
C). Soft iron
D). Ceramics
Answer: Ceramics
305). Weight of a person can be zero when
1. he is falling freely
2. he is orbiting in a satellite
3. he is in an aeroplane flying at a high altitude
4. he is having ride in a gas filled balloon
A). 1 and 2 are correct
B). 1 and 4 are correct
C). 1, 2 and 4 are correct
D). 1, 2, 3 and 4 are correct
Answer: 1 and 2 are correct
306). Mountain roads wind up gradually and do not go straight up, because
A). it is easier to construct winding roads
B). winding roads offer more friction making driving easier
C). on winding roads less force is needed to overcome gravity
D). chances of accidents are less on winding roads
Answer: on winding roads less force is needed to overcome gravity
307). Assertion (A): Escape velocity from the surface of the earth is slightly more at the equator than at the poles.
Reason (R): The earth is rotating and its equatorial radius is more than the polar radius.
A). Both A and R are true and R is the correct explanation of A
B). Both A and R are true but R is not a correct explanation of A
C). A is true but R is false
D). A is false but R is true
Answer: A is false but R is true
308). Assertion (A): A liquid lubricant (e.g. machine oil) increases the efficiency of a machine.
Reason (R): Viscosity of oil is less than the friction between solids.
A). Both A and R are true and R is the correct explanation of A
B). Both A and R are true but R is not a correct explanation of A
C). A is true but R is false
D). A is false but R is true
Answer: Both A and R are true and R is the correct explanation of A
309). Assertion (A): Jet engines can be used to propel vehicles into outer space.
Reason (R): let engines draw air for combustion from the atmosphere.
A). Both A and R are true and R is the correct explanation of A
B). Both A and R are true but R is not a correct explanation of A
C). A is true but R is false
D). A is false but R is true
Answer: A is false but R is true
310). For the same total weight and the same fuel supply, a multistage rocket is preferred over a single-stage rocket, because
A). it is cheaper to build a multistage rocket
B). it is easier to assemble a multistage rocket
C). multistage rocket is safer to launch
D). the final velocity achieved by a multistage rocket is higher
Answer: the final velocity achieved by a multistage rocket is higher
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