Civil Engineering MCQs

Page No. 100

In slow sland filters, the turbidity of raw water can be removed only up to_________________?


a 60 mg/litre


b75 mg/litre


c 100 gm/litre


d 150 mg/litre


View Answer 60 mg/litre

Acidity in water is caused due to_______________?


aMineral acids


bFree CO2


cAluminium sulphate


dAll the above


View Answer All the above

Corrosion of well pipes may not be reduced by_________________?


a reducing the draw down and the pumping rate


b reducing the flow velocity


cusing thicker pipes


dusing screens having larger area of openings



The maximum depth of sedimentation tanks is limited to________________?


a 2 m


b 3 m


c 5 m


d6 m


View Answer 6 m

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


aDarcy’s formula


b Slichter’s formula


c Hazen’s formula


d Lacy’s formula


View Answer Darcy’s formula

The specific retention is least in case of_______________?


aClay


bSand


cSilt


dCoarse gravel


View Answer Coarse gravel

The factor affecting per capita demand, is___________________?


a size of the city


b climatic conditions


ccost of water


dall the above


View Answer all the above

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


aBoarding schools


b Nurses home and medical quarters


c hostels


dall the above


View Answer all the above

The underground sources of water, is from______________?


awells


bsprings


cinfiltration wells


dstorage reservoirs


View Answer storage reservoirs

The R.L. of ground water table on the sides of a valley is 1505 m whereas R.L. of the stream water is 1475 m. If 60° slope consists of pervious soil between R.L. 1485 m to 1500 m, the gravity spring may be expected at the point of reduced level_______________?


a1500 m


b1505 m


c1475 m


d1485 m


View Answer 1485 m

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