Civil Engineering MCQs

Page No. 31

The settlement of a particle in sedimentation tank, is affected by_____________________?


a Velocity of flow

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bViscosity of water

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cSize and shape of solid

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d All the above

✓


View Answer All the above

A sewer pipe contains 1 mm sand particles of specific gravity 2.65 and 5 mm organic particles of specific gravity 1.2, the minimum velocity required for removing the sewerage, is_____________________?


a0.30 m/sec

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b0.35 m/sec

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c0.40 m/sec

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d0.45 m/sec

✓


View Answer 0.45 m/sec

The sewer which collects the discharge from a collecting system and delivers it to a treatment plant, is known_____________________?


aHouse sewer

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bLateral sewer

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cBranch sewer

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d Sewer outfall

✓


View Answer Sewer outfall

The most dangerous pollutant in vehicular emissions is____________________?


aCO

✓


bSO2

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cCO2

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dO3

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View Answer CO

For laying a sewer line in a trench of 2 m width, an offset line is marked on the ground parallel to the given centre line at a distance of___________________?


a 100 cm

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b120 cm

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c140 cm

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d160 cm

✓


View Answer 160 cm

The following is the physical characteristic of sewage___________________?


aTurbidity

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bColour

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cOdour

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d All the above

✓


View Answer All the above

It is customary to design a sewer for D.W.F. on the basis of________________?


aAverage demand

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b Twice the average demand

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cThrice the average demand

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d Four times the average demand

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Fresh sewage is generally_____________________?


aAlkaline

✓


bAcidic

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cHighly decomposed

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d A source of objectionable odour

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View Answer Alkaline

For detecting the nitrites in the sewage, the matching colour may be developed by adding_________________?


aPotassium permanganate

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bSulphuric acid and napthamine

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cPhenol-di -sulphuric acid potassium hydroxide

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d None of these

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The laying of sewers is done with____________________?


aMagnetic compass

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bTheodolite

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cLevel

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dClinometer

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View Answer Level

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