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Civil Engineering MCQs with Explanations

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161Civil EngineeringMedium

The pH value of sewage is determined with the help of________?

ANone of these

BTurbid meter

CPotentiometer

DImhoff Cone

Correct answer

C. Potentiometer

Explanation

The correct answer is Potentiometer.

162Civil EngineeringMedium

Aeration of water is done to remove________?

Abacterias

Bodour

Chardness

Dturbidity

Ecolour

Correct answer

B. odour

Explanation

The correct answer is odour.

163Civil EngineeringMedium

A good building stone should not absorb water more than________?

A15%

B5%

C20%

D10%

Correct answer

B. 5%

Explanation

The correct answer is 5%.

164Civil EngineeringMedium

If the water table rises upto ground surface, then the________?

Aeffective stress is reduced due to decrease in total stress only but pore water pressure does not change

Btotal stress is reduced due to increase in pore water pressure only but effec-tive stress does not change

Ctotal stress is increased due to de-crease in pore water pressure but effective stress does not change

Deffective stress is reduced due to increase in pore water pressure only but total stress does not change

Correct answer

D. effective stress is reduced due to increase in pore water pressure only but total stress does not change

Explanation

The correct answer is effective stress is reduced due to increase in pore water pressure only but total stress does not change.

165Civil EngineeringMedium

Which of the following instrument can be used for measuring speed of an aeroplane ________?

Arotameter

Bhot wire anemometer

CVenturimeter

DOrifice plate

Epitot tube

Correct answer

E. pitot tube

Explanation

The correct answer is pitot tube.

166Civil EngineeringMedium

The maximum spacing of vertical stiffeners is________?

A1.25 d

B1.33 d

C1.75 d

D1.5 d

Correct answer

D. 1.5 d

Explanation

The correct answer is 1.5 d.

167Civil EngineeringMedium

The bracing provided in the plane of end posts is called________?

Atop lateral bracing

Bsway bracing

Cbottom lateral bracing

Dportal bracing

Correct answer

D. portal bracing

Explanation

The correct answer is portal bracing.

168Civil EngineeringMedium

Finer grinding of cement________?

Aaffects only the ultimate strength

Bboth (A. and (B.

Cdoes not affect the strength

Daffects only the early development of strength

Correct answer

D. affects only the early development of strength

Explanation

The correct answer is affects only the early development of strength.

169Civil EngineeringMedium

Addition of pozzolana to ordinary Portland cement increases________?

Ableeding

Bpermeability

Cheat of hydration

Dshrinkage

Correct answer

D. shrinkage

Explanation

The correct answer is shrinkage.

170Civil EngineeringMedium

The shape of recession limb of a hydrograph depends upon________?

Abasin characteristics only

Bboth (A) and (B)

Cnone of the above

Dstorm characteristics only

Correct answer

A. basin characteristics only

Explanation

The correct answer is basin characteristics only.

If the water table rises upto ground surface, then the________?

Aeffective stress is reduced due to decrease in total stress only but pore water pressure does not change

Btotal stress is reduced due to increase in pore water pressure only but effec-tive stress does not change

Ctotal stress is increased due to de-crease in pore water pressure but effective stress does not change

Deffective stress is reduced due to increase in pore water pressure only but total stress does not change

Correct answer

D. effective stress is reduced due to increase in pore water pressure only but total stress does not change

Explanation

The correct answer is effective stress is reduced due to increase in pore water pressure only but total stress does not change.