WATER SUPPLY ENGINEERING QUIZ

Corrosion of well pipes may not be reduced by

using thicker pipes

reducing the draw down and the pumping rate

using screens having larger area of openings

reducing the flow velocity

TRUE ANSWER : ?
YOUR ANSWER : ?

For the prediction of future population of a city, the factor to be considered, is

Births

Deaths

Migrants

All listed here

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

30 times

20 times

15 times

10 times

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

75 mg/litre

150 mg/litre

100 gm/litre

60 mg/litre

TRUE ANSWER : ?
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Acidity in water is caused due to

All the above.

Aluminium sulphate

Mineral acids

Free CO₂

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

All listed here

Boarding schools

Nurses home and medical quarters

hostels

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Asbestos pipes are

light in weight and easy to transport

All listed here

very much smooth and hydraulically efficient

highly resistant to corrosion

TRUE ANSWER : ?
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The expected discharge to be obtained from an open well sunk in coarse sand is 0.0059 cumec. If the working depression head of the well is 3 m, the minimum diameter of the well, is

2 m

2.25 m

2.50 m

3.00 m

TRUE ANSWER : ?
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The process of passing water through beds of granular materials, is called

Screening

Filtration

Sedimentation

None of these

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

Darcy’s formula

Hazen’s formula

Lacy’s formula

Slichter’s formula

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