Civil Engineering MCQs

Page No. 34

For providing an Indian type W.C., the R.C.C. slabs in the toilet portion__________________?


aShould be sunk by 20 cm


bShould be kept 20 cm above the adjacent portion


cShould be sunk by 50 cm


dNeed not be sunk



The width of a rectangular sewer is twice its depth while discharging 1.5 m/sec. The width of the sewer is______________?


a0.68 m


b0.88 m


c1.36 m


d1.76 m


View Answer 1.36 m

In SI units the power of sound is represented in __________________?


aKgs


bJoules


cNewtons


dWatts


View Answer Watts

For the survival of fish in a river stream, the minimum dissolved oxygen is prescribed________________?


a3 ppm


b 4 ppm


c5 ppm


d 10 ppm


View Answer 4 ppm

The coagulant widely used for sewage treatment, is_________________?


aAlum


bFerric chloride


cFerric sulphate


dChlorinated copperas


View Answer Ferric chloride

The ratio of minimum hourly flow to the average flow of sewage is_________________?


a1/4


b1/3


c1/2


d3/4


View Answer 1/3

Removal of oil and grease from sewage, is known____________________?


aScreening


bSkimming


cFiltration


dNone of these


View Answer Skimming

The gradient of sewers depends upon_________________?


aVelocity of flow


bDiameter of the sewer


cDischarge


d All the above


View Answer All the above

The standard B.O.D. of water is taken for_________________?


a1 day


b2 days


c3 days


d5 days


View Answer 5 days

Fresh sewage may become stale in_________________?


aOne hour


bTwo to three hours


cThree to four hours


dSix hours


View Answer Three to four hours

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