Civil Engineering - Water Supply Engineering

1. 

Capacity of soil to absorb moisture, is generally known as

A. permeability
B. porosity
C. infiltration capacity
D. perviousness.

Answer: Option C

Explanation:

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2. 

At break point of chlorination,

A. chlorine is used to oxidise
B. residual chloride is zero
C. residual chloride is maximum
D. residual chlorine reappears.

Answer: Option D

Explanation:

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3. 

The difference in the reservoir level and the lowest point of the water mains is 180 m. The expected pressure due to water hammer is 7.5 kg/cm2 in a pressure conduit of diameter 1 m. Assuming the efficiency of the riveted joints of the pipe as 0.6 and minimum cover 3 mm for corrosion, the thickness of the pipe materials, is

A. 10 mm
B. 15 mm
C. 20 mm
D. 25 mm
E. 30 mm.

Answer: Option C

Explanation:

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4. 

The factor for the selection of pumping station site, is

A. distance of the source of contamination or pollution
B. height above the H.F.L. of the river
C. future expansion
D. proximity of the site from the railway station
E. all the above.

Answer: Option E

Explanation:

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5. 

Low turbidity of water is detected by

A. Turbidity tube
B. Jackson turbidity meter
C. Baylis turbidimeter
D. Hellipe turbidimeter
E. None of these.

Answer: Option C

Explanation:

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