Question with Answer Railway TC Clerk

1. The atmospheric pressure is equal to 75 cm. of Hg. If the mean density of air be taken to be 0.00136 gm/cc. The equivalent weight of the atmosphere is
(a) 187.5 km
(b) 7.5 km
(c) 93.75 km
(d) 15 km
ans (b)
2. Equal masses of two liquids, one of sp.gr. 1.5 and the other of sp.gr.1 are mixed together. The density of the mixture is
(a) 5/3 gm/c.c.
(b) 5/2 gm/c.c.
(c) 3/2 gm/c.c.
(d) 6/5 gm/c.c.
ans (d)
3. A boat loaded with stone floats on the surface of pool of water. When the stone is transferred from the boat to water in the pool, the water level in the pool
(a) rises
(b) falls
(c) remains constant
(d) may rise or fall depending on the density of stone.
ans (b)
4. The freezer in a refrigerator is fitted near the top
(a) so that it can cool the whole interior by setting up convection currents
(b) without any specific purpose
(c) because of convenience
(d) none of these
ans (a)
5. By what process is heat transmitted from the filament of an evacuated electric bulb to the glass?
(a) Conduction
(b) Convection
(c) Radiation
(d) None of these
ans (c)
6. Hot coffee is poured simultaneously in four metallic tumblers painted outside with different types of paints. After some time, the coffee will be found coldest in the tumbler painted
(a) rough white
(b) shining white
(c) rough black
(d) shining black
ans (c)
7. For a given liquid, the rate of evaporation depends o
(a) the temperature of the liquid
(b) the temperature of air
(c) the surface area of the liquid
(d) all of these
ans (d)
8. Which of the following electromagnetic waves has the longest wave length?
(a) ultra-violet
(b) light rayd
(c) gamma rays
(d) infrared
ans (d)
9. In a wireless net, the different sets are tuned with help of the phenomenon known as
(a) interference
(b) beats
(c) interfence
(d) sound ranging
ans (b)
10. Sound travels through longer distances in the night than the day because of phenomenon of
(a) reflection of sound waves
(b) refraction of sound waves
(c) Doppler's effect
(d) Superposition of waves
ans (b)
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