civil engineering MCQs – Page 82

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 Review each marked answer and report any item that may be outdated or unclear.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
1621. A unit hydro graph has one unit of_______________?
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A. discharge

B. rainfall excess

C. rainfall duration

D. time base of direct runoff

1622. 52 kg rails are mostly used in__________________?
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A. Broad Gauge

B. Meter Gauge

C. Narrow Gauge

D. both (A) and (B)

1623. An aggrading river is a_________________?
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A. silting river

B. scouring river

C. both silting and scouring river

D. neither silting nor scouring river

1624. A sphere and a cylinder having the same mass and radii start from rest and roll down the same inclined plane. Which body gets to the bottom first ?
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A. sphere with greater rotational energy at bottom than cylinder

B. sphere with lesser rotational energy at bottom than cylinder

C. cylinder with greater rotational energy at bottom than sphere

D. both reach the bottom simultaneously with equal rotational energy at bottom

1625. The unit of rotational inertia of a body in C.G.S system is________________?
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A. cm4

B. gm-cm2

C. kg-cm2

D. gm-cm3

1626. The distance through which the tongue rail moves laterally at the toe of the switch for movement of trains is called_________________?
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A. heel divergence

B. flangeway clearance

C. none of the above

D. throw of the switch
1627. A land is known as waterlogged_________________?
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A. when the permanent wilting point is reached

B. when gravity drainage has ceased

C. capillary fringe reaches the root zone of plants

D. none of the above

1628. The stage of river carrying a discharge of Q m7sec at a point is 10 m and slope of water surface is (1/4000). The discharge of a flood at the same point and same stage of 10 m with a water surface slope of(l/1000) will be________________?
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A. 4 Q m3/sec

B. 2 Q m3/sec

C. 0.5 Q mVsec

D. V2 Q m3/sec

1629. The peak of a 4 hour flood hydrograph is 240 m3/sec . If the rainfall excess is 80 mm and base flow which is constant is 40 m3/sec, then the peak of 4-hours unit hydrograph will be__________________?
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A. 25 m3/sec

B. 30 m3/sec

C. 20 3/sec

D. 35 m3/sec

1630. If the demand line drawn from a ridge in a flow mass curve does not intersect the curve again, it indicates that______________?
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A. demand cannot be met by inflow

B. reservoir was not full at the beginning

C. both (A) and (B)

D. none of the above

1631. A runoff river plant_________________?
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A. has no pondage at all

B. is suitable only on a perennial river

C. is a medium head scheme

D. generates power during peak hours only

1632. Instantaneous center is at infinity when the angular velocity is _________________?
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A. zero

B. minimum

C. maximum

D. constant

1633. A river training work is generally required when the river is_______________?
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A. aggrading type

B. degrading type

C. meandering type

D. both (A) and (B)

1634. A 6 hours storm had 4 cm of rainfall and the resulting runoff was 2 cm. If <j) index remains at the same value, the runoff due to 10 cm of rainfall in 12 hours in the catchment is___________________?
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A. 6.0 cm

B. 9.0 cm

C. 7.5 cm

D. 4.5 cm

1635. A simple pendulum of length 1 has an energy E when its amplitude is A. If its amplitude is increased to 2 A, the energy becomes____________________?
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A. 2E

B. 4E

C. E

D. E/2

1636. Horizontal acceleration due to earthquake results in______________?
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A. hydrodynamic pressure

B. inertia force into the body of the dam

C. both (A) and (B)

D. none of the above

1637. The flow of water after spilling over the weir crest in chute spillway and side channel spillway respectively are_________________?
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A. parallel and at right angle to weir crest

B. parallel to weir crest in both

C. at right angle to weir crest in both

D. at right angle and parallel to weir crest
1638. For a 8 curve track diverging from a main curve of 5 in an opposite direction in the layout of a broad gauge yard, the cant to be provided for the branch track for maximum speed of 45 km/h on the main line and G = 1.676 m is (Permitted cant deficiency for the main line = 7.6 cm)______________________?
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A. 7.768 cm

B. 7.432 cm

C. 0.168 cm

D. -0.168 cm
1639. If the R.Ls of canal bed level and high flood level of drainage are 212.0 m and 210.0 m respectively, then cross drainage work will be________________?
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A. superpassage

B. aqueduct

C. syphon

D. syphon aqueduct

1640. Instantaneous unit hydrograph is a hydrograph of________________?
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A. correct answer is?

B. infinitely small rainfall excess</strong>

C. unit rainfall excess

D. infinitely small duration

E. unit duration