1. 1 horse power is equal to-
(A) 776 watts
(B) 746 watts
(C) 11,000 volts
(D) None of the above
ANS. (B) 746 Watt
2. The Sun is made up mainly -
(A) Hydrogen
(B) Helium
(C) Carbon
(D) Both (A) and (B)
ANS. (D) (A) and (B) both
3. If a man is coming towards the plane mirror at a speed of 5 meters per second, then at what speed will the image of man appear to be coming in the mirror?
(A) 2.5 m / s
(B) 5 m / s
(C) 7.5 m / s
(D) 10 m / s
ANS. (D) 10 m / s
4. What is the shape of a candle flame in a state of weightlessness?
(A) longer
(B) Smaller
(C) Spherical
(D) will remain the same
ANS. (D) will remain the same
5. Why is radar in use?
(A) Detection of objects by light waves
(B) Detecting objects by reflecting sound waves
(C) In determining the position of objects by radio waves
(D) In chasing the rain clouds
ANS. (C) In determining the position of objects by radio waves
6. What type of arrangement is done in brakes in self-propelled trains?
(A) Hydraulic
(B) electromagnetic
(C) Turbo
(D) gear
ANS. (A) Hydraulics
7. Sound wave is-
(A) longitudinal
(B) Transverse
(C) electromagnetic
(D) None of the above
ANS. (A) longitudinal
8. To hear a clear resonance, the distance between the listener and the reflector must be
(A) 25 m
(B) 17 m
(C) 12 m
(D) 9 m
ANS. (B) 17 m
9. Which of the following pairs is not correctly matched?
Device energy conversion
(A) Microphone - Sound energy into electrical energy
(B) Loudspeaker - electrical energy into sound energy
(C) Dynamo - mechanical energy into electrical energy
(D) Sitar - Sound energy in mechanical energy
ANS. (D) Sitar - Sound Energy in Mechanical Energy
10. Who among the following had said before Newton that all things are gravitated towards the earth?
(A) Aryabhata
(B) Varahami
(C) Buddhagupta
(D) Brahmagupta
ANS. (D) Brahmagupta
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