Civil Engineering MCQs

Page No. 145

For a flood control reservoir, the effective storage is equal to_______________?


a useful storage – valley storage


b useful storage + surcharge storage


c useful storage + surcharge storage + valley storage


duseful storage + surcharge storage -valley storag



The total capacity of a reservoir is 25 million cubic metres and dead storage is 5 million cubic metres. If the average volume of sediment deposition is 0.10 million cubic metre per year, then the usefulness of the reservoir will start reducing after_________________?


a 50 years


b150 years


c200 years


d250 year


View Answer 50 years

The uplift pressure on a dam can be controlled by_________________? 0 1) constructing cutoff under upstream face 2) constructing drainage channels bet-ween the dam and its foundation 3) by pressure grouting in foundation The corret answer is?


a only (1)


b both (1) and (2)


cboth (1) and (3)


d(1), (2) and (3)


View Answer (1), (2) and (3)

Horizontal acceleration due to earthquake results in______________?


ahydrodynamic pressure


b inertia force into the body of the dam


cboth (A) and (B)


dnone of the above


View Answer both (A) and (B)

The major resisting force in a gravity dam is___________________?


awater pressure


bwave pressure


cself-weight of dam


d uplift pressure


View Answer self-weight of dam

The maximum permissible eccentricity for no tension at the base of a gravity dam is__________________?


aB/2


bB/3


cB/4


dB/6


View Answer B/6

As compared to gravity dams, earthen dams__________________?


aare costlier


bare less susceptible to failure


crequire sound rock foundations


drequire less skilled labour



Seepage through embankments in an earthen dam is controlled by_______________?


a drainage filters


b relief wells


cdrain trenches


dprovision of downstream berms


View Answer drain trenches

Main purpose of mean water training for rivers is________________?


aflood control


b to provide sufficient depth of water in navigable channels, during low water periods


c to preserve the channel in good shape by efficient disposal of suspended and bed load


d all of the above



The flow of water after spilling over the weir crest in chute spillway and side channel spillway respectively are_________________?


aat right angle and parallel to weir crest


bparallel and at right angle to weir crest


cparallel to weir crest in both


dat right angle to weir crest in both



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