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general knowledge practice set

26. The temperature of oxy-acetylene flame is around
(A) 2800 oC
(B) 3200 oC
(C) 4000 oC
(D) 1500 oC


27. Which is the most stable eco-system?
(A) Desert
(B) Ocean
(C) Mountain
(D) Forest


28. Lambert’s law is related to
(A) Reflection
(B) Refraction
(C) Interference
(D) Illumination


29. The coral reefs are the marine counterparts of
(A) Temperate forests
(B) Tropical rain forests
(C) Savannahs
(D) Scrubland


30. The Refrigerant ‘FERON’ is
(A) Calcium
(B) Difluoro Dichloro Methane
(C) Fluorspar and Felspar
(D) Hydrofluosilicic Acid