RRB Junior Engineer (JE) Sample Paper: General Science-36

1. The important ore of aluminium is

(a) bauxite
(b) cryolite
(c) fluorspar
(d) haematite

2. Aua regia is a 1:3 mixture by volume of

(a) conc. nitric acid and cone hydrochloric acid
(b) cone hydrochloric acid and cone nitric acid
(c) cone nitric acid and cone sulphuric acid
(d) conc. sulphuric acid and cone nitric acid

3. What is the maximum Water Vapour content in the atmosphere?

(a) 2 to 3 per cent
(b) 3 to 4 per cent
(c) 4 to 5 per cent
(d) 5 to 6 per cent

4. The amount of chlorine available in water after disinfection is: called as

(a) free chlorine
(b) residual chlorine
(c) free available chlorine
(d) combined available chlorine

5. What are the major pollutants of cigarette smoke?

(a) Carbon monoxide and dioxin
(b) Carbon monoxide and nicotine
(c) Carbon monoxide and benzene
(d) Dioxin and benzene

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

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