Civil Engineering MCQs

Page No. 101

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


a7.2 mm


b 7.9 mm


c 8.6 mm


d10 mm


View Answer 8.6 mm

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


acalcium sulphate


bmagnesium sulphate


ccalcium nitrate


dcalcium bicarbonate


View Answer calcium bicarbonate

Asbestos pipes are ______________?


a light in weight and easy to transport


bhighly resistant to corrosion


chigh flexible to accommodate deflection upto 12°


d all the above


View Answer all the above

In distribution pipes, drain valves are provided at_______________?


a lower point


bhigher point


c junction points


d any where


View Answer lower point

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


a nil


b5


c10


d 15


View Answer nil

Surge tanks are used_______________?


afor storage water


b to increase the velocity in a pipeline


cas overflow valves


dto guard against water hammer



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


a7 years


b14 years


c21 years


d 35 years


View Answer 35 years

Sunlight_________________ ?


a helps growth of bacterias


bimpedes growth of algae


cincreases dissolved oxygen content


dreduces turbidity



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


a 10 times


b15 times


c20 times


d30 times


View Answer 30 times

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


aKuichling’s formula


b Freeman formula


cUnder Writers formula


dAll the above.


View Answer All the above.

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