RRB Junior Engineer (JE) Sample Paper: General Science-30

Q1. Which of the following is not present in German silver?

(a) Copper
(b) Nickel
(c) Silver
(d) Zinc

Q2. The major harmful gas emitted by automobile vehicles which causes air pollution is

(a) Carbon Monoxide
(b) Methane
(c) Carbon dioxide
(d) Ozone gas

Q3. Which one of the following is a major greenhouse gas?

(a) Carbon dioxide
(b) Chloro fluorocarbon
(c) Carbon monoxide
(d) Freon

Q4. Pasteurization is the process in which milk is heated to

(a) 60°C for 10 minutes .
(b) 63° C for 20 minutes
(c) 63°C for 30 minutes
(d) 72°C for 10 minutes

Q5. The freezer in a refrigerator isfitted near the top

(a) to keep it away from hot compressor which is nearer to the bottom
(b) because of convenience
(c) it facilitates convection currents .
(d) to minimize power consumption

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Study Kit for RRB Junior Engineer EXAM (Phase-1) 

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