Civil Engineering - Water Supply Engineering

36. 

The rate of silting in a reservoir

A. is less in the beginning
B. remains constant throughout
C. is more in the beginning
D. is more in the beginning and reduces in the end
E. none of these.

Answer: Option D

Explanation:

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37. 

Estimates of a water supply project depends upon the rate of water supply per capita consumption and probable population estimated at the end of the design period of

A. 5 to 10 years
B. 10 to 15 years
C. 15 to 20 years
D. 20 to 30 years
E. 25 years.

Answer: Option D

Explanation:

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38. 

In centrifugal pump installation,

A. pump is properly primed before starting
B. the diameter of the pipe at inlet as well as at outlet, is kept smaller than the delivery pipe
C. the foot valve fitted at the bottom end of the suction pipe, prevents the movement of water from the pump when it is stopped
D. the motor may burn out if it is started with empty delivery pipe and with open gate valve
E. all the above.

Answer: Option E

Explanation:

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39. 

Pipes are laid parallel

A. to increase the capacity of the water supply
B. to provide a means of repairing without closing water supply
C. to meet the requirement of excessive supply
D. all the above.

Answer: Option D

Explanation:

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40. 

Maximum permissible colour for domestic water supplies, based on Cobalt scale, is

A. 5 P.P.M.
B. 10 P.P.M.
C. 15 P.P.M.
D. 20 P.P.M.
E. 25 P.P.M.

Answer: Option D

Explanation:

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