civil engineering MCQs – Page 62

Practise multiple-choice questions from civil engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

civil engineering Mcqs
1221. The pole distance is measured in___________________?
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A. mass scale

B. time scale

C. distance scale

D. force scale
1222. Activated carbon is used for_____________?
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A. removing corrosiveness

B. removing hardness

C. disinfection

D. removing odours
1223. When the velocity distribution is uniform over the cross-section, the correction factor for momentum is__________________?
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A. 3-Apr

B. 1

C. 0

D. 2

1224. An ideal fluid is_______________?
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A. very viscous

B. frictionless and compressible

C. frictionless and incompressible

D. one which obeys Newtons law of viscosity

1225. Which of the following unit works in anaerobic conditions ?
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A. trickling filters

B. activated sludge treatment

C. sludge digestion tank

D. sedimentation tank

1226. Two balls of masses 3 kg and 6 kg are moving with velocities of 4 m/sec and 1 m/sec respectively, towards each other along the line of their centers. After impact the 3 kg ball comes to rest. This can happen only if the coefficient of restitution between the balls is____________________?
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A. 3-Jan

B. 5-Mar

C. 1/5

D. 3-Feb

1227. For satisfactory working of a sludge digestion unit, the pH range of digested sludge should be maintained as___________________?
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A. 4.5 to 6.0

B. 8.5 to 10.0

C. 6.5 to 8.0

D. 10.5 to 12.0

1228. A circular disc rotates at n rpm. The angular velocity of a circular ring of same mass and radius as the disc and to have the same angular momentum is___________________?
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A. n rpm

B. 2n rpm

C. n/4 rpm

D. n/2 rpm
1229. Which of the following retards the self purification of stream ?
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A. satisfying oxygen demand

B. higher temperature

C. none of the above

D. sunlight

1230. Disinfection efficiency is________________?
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A. highest at pH value equal to 7

B. reduced at higher pH value of water

C. unaffected by pH value of water

D. increased at higher pH value of water

1231. The overflow rate for plain sedimentation tanks is about__________________?
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A. 500 to 750 litres/hour/ m2

B. 1500 to 2000 litres/hour/m2

C. 1250 to 1500 litres/hour/m2

D. 1000 to 1250 litres/hour/ m2

1232. Minimum potential energy of a system will be in the position of________________?
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A. all of the above

B. neutral equilibrium

C. stable equilibrium

D. unstable equilibrium

1233. Orthotolidine test is used for determination of________________?
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A. biochemical oxygen demand

B. dissolved oxygen

C. residual chlorine

D. dose of coagulant

1234. A heavy ladder resting on floor and against a vertical wall may not be in equilibrium if________________?
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A. floor is smooth and wall is rough

B. floor is rough and wall is rough

C. both floor and wall are rough

D. both floor and wall are smooth

1235. Two pipe systems are said to be equivalent when_________________?
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A. friction factor and length are same in two systems

B. length of pipe and discharge are same in two systems

C. head loss and discharge are same in two systems

D. length and diameter are same in two systems

1236. When there is no recirculation of sewage, then recirculation factor is_______________?
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A. 0

B. 1

C. none of the above

D. infinity

1237. The maximum pull in a cable, carrying a uniformly distributed load and supported at two ends which are at the same level, is at_____________________?
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A. mid span

B. supports

C. quarter span

D. none of the above

1238. Assertion A : The consumption of water increases with increase in the distribution pressure. Reason R : Higher distribution pressure causes more loss and waste of water. Select your answer according to the coding system given below?
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A. Both A and R are true and R is the correct explanation of A

B. Both A and R are true but R is not the correct explanation of A

C. A is true but R is false

D. A is false but R is true

1239. An egg shaped section of sewer________________?
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A. is easy to construct

B. is economical than circular section

C. is more stable than circular section

D. provides self cleansing velocity at low discharges
1240. Cartesian form of the equation of catenary is_________________?
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A. y = c tan x/c

B. y = c sinh x/c

C. y = c cosh x/c

D. y = c sin1 x/c