RRB Junior Engineer (JE) Sample Paper: General Awareness (General Science)-35

1. Big suitcases are provided thicker handles to

(a) decrease the pressure on the hand.
(b) increase the pressure on the hand.
(c) decrease the force on the hand.
(d) increase the force on the hand.

2. A piece of metal feels hotter than a piece of wood in summer because

(a) metal expands more than wood
(b) our body is cooler than metal but warmer than wood
(c) metal is a better conductor of heat than wood
(d) metal gets hotter than wood

3. Four identical kettles with the same amount of water have bases made of different metals of the same thickness. If these kettles are placed on identical flames in an identical manner, water will boil first in the kettle the base of which is made of:

(a) brass
(b) copper
(c) stainless steel
(d) aluminium

4. Why is platinum wire used inside very narrow glass rods ?

(a) Platinum expands very little compared to glass
(b) Platinum and glass have the same linear coefficients of expansion
(c) Glass is a bad conductor of heat
(d) Platinum does not melt at low temperature

5. Identify the conceptual difference between a particle and a wave :

(a) A wave requires material medium while a particle does not require medium for its propagation.
(b) A particle transports matter but a wave does not.
(c) A particle is visible but a wave is not visible.
(d) All the above.

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