civil engineering MCQs – Page 67

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 Review each marked answer and report any item that may be outdated or unclear.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
1321. Pascal-second is the unit of______________?
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A. pressure

B. kinematic viscosity

C. surface tension

D. dynamic viscosity
1322. The detention period for oxidation ponds is usually kept as______________?
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A. 10 to 15 days

B. 24 hours

C. 3 months

D. 4-8 hours

1323. Standard EDTA (ethylene diamine tetra acetic aciD. solution is used to determine the_______________?
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A. hardness in water

B. dissolved oxygen in water

C. turbidity in water

D. residual chlorine in water

1324. The polluted water is one which_______________?
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A. is contaminated

B. is safe and suitable for drinking and domestic use

C. contains pathogenic bacteria

D. consists of undesirable substances rendering it unfit for drinking and domestic use
1325. Which of the following sewers is preferred for combined system of sewage ?
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A. circular sewer

B. none of the above

C. egg shaped sewer

D. rectangular sewer

1326. A pipe which is installed in the house drainage to preserve the water seal of traps is called______________?
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A. soil pipe

B. waste pipe

C. vent pipe

D. antisiphonage pipe
1327. The distribution mains are designed for________________?
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A. maximum hourly demand

B. maximum hourly demand on maximum day

C. average daily demand

D. maximum daily demand

1328. In case of an airfoil, the separation of flow occurs________________?
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A. at the extreme front of body

B. at the extreme rear of body

C. midway between rear and front of body

D. any where between rear and front of body depending upon Reynolds number

1329. The ratio of the speed of a rolling cylinder to the speed of sliding cylinder is_______________?
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A. equal to 1

B. less than 1

C. greater than 2

D. between 1 and 2

1330. A system of copianar forces is in equilibrium when___________________?
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A. force polygon closes

B. funicular polygon closes

C. both force polygon and funicular polygon close

D. all the forces are concurrent

1331. For a country like India, where rainfall is mainly confined to one season, the suitable sewerage system will be________________?
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A. separate system

B. partially separate system

C. combined system

D. partially combined system

1332. One Joule is equivalent to________________?
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A. 1 dyne metre

B. 1 kg wt metre

C. 9.81 Newton metre

D. 1 Newton metre
1333. A stone was thrown vertically upwards from the ground with a velocity of 50 m/sec. After 5 seconds another stone was thrown vertically upwards from the same place. If both the stones strike the ground at the same time, then the velocity with which the second stone was thrown should be (Assume g = 10 m/sec2)______________________?
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A. 40 m/sec

B. 50 m/sec

C. 15 m/sec

D. 25 m/sec
1334. Select the incorrect statement?
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A. Contraction is least at vena contracta

B. Coefficient of contraction is always less than one

C. Stream lines are parallel throughout the jet at vena contracta

D. The pressure intensity at vena contracta is atmospheric

1335. Scour valves are provided ______________?
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A. at every summit of rising mains

B. at street corners to control the flow of water

C. at every depression and dead ends to drain out the waste water that may collect there

D. at the foot of rising main along the slope to prevent back running of water

1336. The layout of distribution system in which water flows towards the outer periphery is_________________?
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A. dead end system

B. radial system

C. grid iron system

D. ring system

1337. If the dynamic viscosity of a fluid is 0.5 poise and specific gravity is 0.5, then the kinematic viscosity of that fluid in stokes is__________________?
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A. 1.0

B. 0.25

C. 0.5

D. none of the above

1338. The distance y from pipe boundary, at which the point velocity is equal to average velocity for turbulent flow, is________________?
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A. 0.707 R

B. 0.577 R

C. 0.223 R

D. 0.423 R

1339. The phenolic compounds in public water supply should not be more than_______________?
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A. 0.0001 ppm

B. 0.1 ppm

C. 0.01 ppm

D. 0.001 ppm
1340. A rope is wrapped twice around a rough pole with a coefficient of friction A . It is subjected to a force Fj at one end and a gradually increasing force F2 is applied at the other end till the rope just starts slip-ping. At this instant the ratio of F2 to Fi is_____________________?
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A. e4*

B. e2*

C. 1

D. e*72