Civil Engineering - Water Supply Engineering

36. 

The least thickness of class B cast iron (spun) pipe, is

A. 7.2 mm
B. 7.9 mm
C. 8.6 mm
D. 10 mm.

Answer: Option C

Explanation:

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37. 

According to IS : 1172-1963, a minimum of 135 litres of water capita per day, is required for

A. Boarding schools
B. Nurses home and medical quarters
C. hostels
D. all the above.

Answer: Option D

Explanation:

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38. 

The R.L. of ground water table on the sides of a valley is 1505 m whereas R.L. of the stream water is 1475 m. If 60° slope consists of pervious soil between R.L. 1485 m to 1500 m, the gravity spring may be expected at the point of reduced level

A. 1500 m
B. 1505 m
C. 1475 m
D. 1485 m.

Answer: Option D

Explanation:

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39. 

The factor affecting per capita demand, is

A. size of the city
B. climatic conditions
C. pressure in water mains
D. cost of water
E. all the above.

Answer: Option E

Explanation:

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40. 

Pick up the incorrect statement from the following. The underground sources of water, is from

A. wells
B. springs
C. infiltration wells
D. storage reservoirs
E. none of these.

Answer: Option D

Explanation:

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