Civil Engineering MCQs

Page No. 101

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


a7.2 mm

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b 7.9 mm

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c 8.6 mm

✓


d10 mm

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View Answer 8.6 mm

By boiling water, hardness can be removed if it is due to_________________?


acalcium sulphate

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bmagnesium sulphate

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ccalcium nitrate

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dcalcium bicarbonate

✓


View Answer calcium bicarbonate

Asbestos pipes are ______________?


a light in weight and easy to transport

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bhighly resistant to corrosion

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chigh flexible to accommodate deflection upto 12°

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d all the above

✓


View Answer all the above

In distribution pipes, drain valves are provided at_______________?


a lower point

✓


bhigher point

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c junction points

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d any where

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View Answer lower point

Biochemical Oxygen Demand (B.O.D.) of safe drinking water must be________________?


a nil

✓


b5

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c10

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d 15

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View Answer nil

Surge tanks are used_______________?


afor storage water

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b to increase the velocity in a pipeline

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cas overflow valves

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dto guard against water hammer

✓



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


a7 years

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b14 years

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c21 years

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d 35 years

✓


View Answer 35 years

Sunlight_________________ ?


a helps growth of bacterias

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bimpedes growth of algae

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cincreases dissolved oxygen content

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dreduces turbidity

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


a 10 times

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b15 times

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c20 times

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d30 times

✓


View Answer 30 times

The fire demand of a city may be worked out by _________________?


aKuichling’s formula

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b Freeman formula

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cUnder Writers formula

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dAll the above.

✓


View Answer All the above.

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