WATER SUPPLY ENGINEERING QUIZ

Surcharge storage zone of a reservoir, is

Between dead storage and useful storage

Also known as valley storage

Above useful storage

Below dead storage

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Mathamoglobinemia or blue baby disease is caused due to

Sulphides

Nitrites

Chlorides

Nitrates

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In distribution pipes, drain valves are provided at

lower point

any where

junction points

higher point

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Turbidity of raw water is a measure of

Acidity of water

None of these

O.D

Suspended solids

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To pump water from a water reservoir 3 m deep and maximum water level at 135 m, a pump is installed to lift water up to R.L. 175 m at a constant rate of 36,00,000 litres per hour. If the length of the pipe is 1506 m and f = 0.01, ignoring other minor losses and assuming the economical diameter from Lea's formula D = 1.2 √Q, the water horse power of the pump is

400

600

450

500

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The fire demand of a city may be worked out by

Freeman formula

All listed here

Kuichling’s formula

Bustan’s formula

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Aeration of water is done to remove

bacterias

hardness

colour

odour

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In centrifugal pump installation,

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

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

Pump is properly primed before starting

All listed here

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The maximum depth of sedimentation tanks is limited to

6 m

4 m

3 m

5 m

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Average annual rainfall at any station is the average of annual rainfall over a period of

14 years

35 years

21 years

28 years

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