civil engineering MCQs – Page 72

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 Review each marked answer and report any item that may be outdated or unclear.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
1421. As compared to geometrical increase method of forecasting population, arithmetical increase method gives________________?
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A. higher value

B. lesser value

C. accurate value

D. same value

1422. Standard BOD is measured at________________?
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A. 25C- 3day

B. 20C 1day

C. 30C- 5day

D. 20C 5day
1423. The increase in meta centric height_________________?
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A. correct answer is?

B. decreases stability

C. increases stability

D. decreases comfort for passengers</strong>

E. increases comfort for passengers

1424. Select the correct statement?
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A. A pipe becomes smooth after using for long time

B. The absolute roughness of a pipe de-creases with time

C. The absolute roughness increases with time

D. The friction factor decreases with time

1425. The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as__________________?
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A. center of buoyancy

B. center of pressure

C. metacentre

D. center of gravity

1426. The ratio of 5 day BOD to ultimate BOD is about_______________?
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A. 3-Jan

B. 1

C. 2/3

D. 4-Mar

1427. A stone is thrown up a slope of inclination 60 to the horizontal. At what angle to the slope must the stone be thrown so as to land as far as possible from the point of projection ?
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A. 30

B. 45

C. 75

D. 15
1428. A funicular polygon cannot be made to pass through___________________?
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A. three specified points

B. one specified point

C. two specified points

D. more than three specified points
1429. If the total hardness of water is greater than its total alkalinity, the carbonate hardness will be equal to________________?
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A. total hardness total alkalinity

B. non carbonate hardness

C. total hardness

D. total alkalinity
1430. A hoop of radius 3 m weighs 100 kg. It rolls along a horizontal floor so that at its centre of mass has a speed of 200 mm/sec, . The work required to stop the hoop is______________?
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A. 4 J

B. 8 J

C. 6 J

D. 2 J

1431. The viscosity of a gas_______________?
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A. decreases with increase in temperature

B. is independent of pressure for very high pressure intensities

C. increases with increase in temperature

D. is independent of temperature

1432. For normal sludge, the value of sludge index for Indian conditions is________________?
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A. 0 to 50

B. 150 to 350

C. 350 to 500

D. 50 to 150

1433. A vertical rectangular plane surface is submerged in water such that its top and bottom surfaces are 1.5 m and 6.0 m res-pectively below the free surface. The position of center of pressure below the free surface will be at a distance of________________?
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A. 4.2m

B. 4.5m

C. 3.75 m

D. 4.0 m

1434. Laying of sewers is usually done with the help of________________?
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A. a plane table

B. a compass

C. a theodolite

D. sight rails and boning rods
1435. The pressure at the summit of a syphon is_______________?
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A. more than atmospheric

B. none of the above

C. equal to atmospheric

D. less than atmospheric
1436. The water carriage system of collection of waste product________________?
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A. requires treatment before disposal

B. all of the above

C. creates hygenic problem

D. is cheaper in initial cost than dry conservancy system

1437. Presence of tail water in a gravity dam_____________?
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A. correct answer is

B. decreases the principal stress

C. increases the principal stress

D. increases the shear stress

E. decreases the shear stress</strong>

1438. Two objects moving with uniform speeds are 5 m apart after 1 second when they move towards each other and are 1 m apart when they move in the same direction. The speeds of the objects are____________________?
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A. 3 m/sec and 2 m/sec

B. 3 m/sec and 3 m/sec

C. 4 m/sec and 6 m/sec

D. 2 m/sec and 2 m/sec

1439. A hyetograph is a graphical representation of___________________?
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A. cumulative rainfall and time

B. discharge and time

C. rainfall depth and time

D. rainfall intensity and time
1440. The ratio of kinetic energy and potential energy of a simple harmonic oscillator, at a displacement equal to half its amplitude is given by__________________?
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A. 1:02

B. 1:01

C. 2:01

D. 3:1