1641: The purest form of water is obtained from:
(a) A deep tube well
(b) A running stream
(c) Hot water spring
(d) Heavy rains
1642: A man is standing on the 8 m long shadow of a 6 m long pole. If the length of his shadow is 2.4 m, what is the height of the man ?
(a) 1.4m
(b) 1.6m
(c) 1.8m
(d) 2.0m
1643: Why is it easier to cook in a pressure cooker?
(a) High pressure creates turbulence
(b) More steam is formed inside the cooker
(c) Boiling point of water is raised
(d) Boiling point of water is lowered
1644: Which one of the following countries is planning to construct a rival to the Panama Canal to link the Pacific and Atlantic oceans ?
(a) Colombia
(b) Costa Rica
(c) Nicaragua
(d) Guatemala
1645: Khetri, Kolar, Sindri and Jharia are associated with:
(a) Copper, gold, fertilisers and coal
(b) Copper, gold, coal and iron
(c) Copper, gold, coal and gypsum
(d) Iron, gold, coal and copper