सिभिल सब-इन्जिनियर, Asst. सब-इन्जिनियर लोक सेवा तयारी संघ/प्रदेश

Q.Time of concentration

A. is the time taken, for precipitation

B. duration of rainfall.

C. time taken for all the ran off to reach the drain

D. time taken for the storm water to travel from the most remote point to the drain.

Turbidity of raw water is a measure of

A. Suspended solids

B. Acidity of water

C. B.O.D

D. None of these

Q. When D.P.C is to be laid over large areas The material preferred is

a) cement concrete
b) bitumen felt
c) mastic asphalt
d) strips of lead

An internal focussing type surveying telescope, may be focussed by the movement of

A. objective glass of the telescope
B. convex-lens in the telescope
C. concave lens in the telescope
D. plano-convex lens in the telescope.

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