RRB Junior Engineer (JE) Sample Paper: General Science-14

1. Dynamo is a device for converting

(a) Heat energy into electrical energy
(b) Mechanical energy into electrical energy
(c) Magnetic energy into electrical energy
(d) Chemical energy Into electrical energy

2. Oil rises up the wick in a lamp because

(a) Oil is very light
(b) Of the diffusion of oil through the wick
(c) Of the surface tension phenomenon
(d) Of the capillary action phenomenon

3. In the atmosphere ultraviolet rays are absorbed by

(a) Oxygen
(b) Nitrogen
(c) Ozone
(d) Helium

4. An electron microscope gives higher magnification than an optical microscope because:

(a) it uses more powerful lenses
(b) the velocity of electron is smaller than that of visible light
(c) the electrons have more energy than the light particles
(d) the wavelength of elections is smaller as compared to the wavelength of visible light

5. For a body moving with no uniform velocity and uniform acceleration

(a) (X) Displacement Time graph is linear.
(b) Displacement Time graphic is nonlinear
(c) Velocity Time graph is nonlinear
(d) Velocity Time graph is linear

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1(b), 2(d), 3(a), 4(d), 5(b)