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

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bShould be kept 20 cm above the adjacent portion

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cShould be sunk by 50 cm

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dNeed not be sunk

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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

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b0.88 m

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c1.36 m

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d1.76 m

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View Answer 1.36 m

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


aKgs

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bJoules

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cNewtons

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dWatts

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View Answer Watts

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


a3 ppm

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b 4 ppm

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c5 ppm

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d 10 ppm

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View Answer 4 ppm

The coagulant widely used for sewage treatment, is_________________?


aAlum

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bFerric chloride

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cFerric sulphate

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dChlorinated copperas

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View Answer Ferric chloride

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


a1/4

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b1/3

✓


c1/2

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d3/4

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View Answer 1/3

Removal of oil and grease from sewage, is known____________________?


aScreening

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bSkimming

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cFiltration

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dNone of these

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View Answer Skimming

The gradient of sewers depends upon_________________?


aVelocity of flow

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bDiameter of the sewer

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cDischarge

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d All the above

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View Answer All the above

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


a1 day

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b2 days

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c3 days

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d5 days

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View Answer 5 days

Fresh sewage may become stale in_________________?


aOne hour

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bTwo to three hours

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cThree to four hours

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dSix hours

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View Answer Three to four hours

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