Civil Engineering - Water Supply Engineering

26. 

The depth of the water table at a place is 45 m below the general ground level. To lift water from a deep tube well in such a locality, the type of pump to be installed is

A. Centrifugal pump
B. Reciprocating pump
C. Deep well turbine pump
D. None of these.

Answer: Option C

Explanation:

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27. 

Critical time for developing a water hammer, is the time required for

A. closing the valve
B. the wave to travel from valve to the reservoir
C. the wave to travel from the valve to the reservoir and back
D. none of these.

Answer: Option C

Explanation:

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28. 

According to Buston's formula, fire demand in litres per minute for a population of P thousands, is

A. 3182 P
B.
C. 4637 P (1 - 0.01 P)
D. 5663 P
E. none of these.

Answer: Option D

Explanation:

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29. 

The ratio of maximum hourly consumption and average hourly consumption of the maximum day, is

A. 1.2
B. 1.5
C. 1.8
D. 2.4
E. 2.7

Answer: Option E

Explanation:

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30. 

Cast iron pipes are generally preferred to, because

A. of moderate cost
B. of ease to join
C. of durability
D. of longer life
E. all the above.

Answer: Option E

Explanation:

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