Civil Engineering - Water Supply Engineering

36. 

Pick up the incorrect statement from the following. In take of water supply should

A. be nearer to the treatment plant
B. receive water from purer zone of the source
C. be located downstream of waste water disposal point
D. remain easily accessible during floods.

Answer: Option C

Explanation:

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37. 

Reciprocating pumps

A. are not suitable for variable heads
B. are four times costlier than centrifugal pumps
C. are not suitable for pumping water containing sediments
D. single stroke produce pulsating flow
E. none of these.

Answer: Option A

Explanation:

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38. 

The temporary hardness of water can be removed by

A. boiling
B. adding lime
C. adding alum
D. filtration
E. sedimentation.

Answer: Option A

Explanation:

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39. 

Rapid gravity filters

A. were developed by G.W. Fullar
B. make use of coarser sand with effective size as 0.5 mm
C. yield as high as 30 times the yield of slow sand filters
D. are fed with coagulation treated water
E. all the above.

Answer: Option E

Explanation:

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40. 

If n is porosity, y is specific yield and r is specific retention of any soil, the relationship which holds good, is

A. n + y + r = 1
B. n + y = r
C. n + r = y
D. y + r = n
E. n + r + y = 0

Answer: Option D

Explanation:

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