WATER SUPPLY ENGINEERING QUIZ

In slow sland filters, the turbidity of raw water can be removed only up to

150 mg/litre

100 gm/litre

60 mg/litre

75 mg/litre

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Surcharge storage zone of a reservoir, is

Above useful storage

Below dead storage

Also known as valley storage

Between dead storage and useful storage

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The specific retention is least in case of

Clay

Coarse gravel.

Silt

Sand

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

springs

infiltration wells

storage reservoirs

wells

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When the reduced level of the water source is higher than the reduced level of the consumer's place, water is generally supplied

Both (A) and (B)

By pumping system

All listed here

By gravitational system

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The yield of a rapid gravity filter as compared to that of slow sand filter, is

10 times

20 times

30 times

15 times

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As per IS : 1172-1963, water required per head per day for average domestic purposes, is

135 litres

85 litres

105 litres

65 litres

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In centrifugal pump installation,

All listed here

The diameter of the pipe at inlet as well as at outlet, is kept smaller than the delivery pipe

Pump is properly primed before starting

The motor may burn out if it is started with empty delivery pipe and with open gate valve

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For determining the velocity of flow of underground water, the most commonly used non-empirical formula is

Darcy’s formula

Slichter’s formula

Hazen’s formula

Lacy’s formula

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

hostels

Boarding schools

All listed here

Nurses home and medical quarters

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