civil engineering MCQs – Page 225

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 Review each marked answer and report any item that may be outdated or unclear.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
4481. Alkalinity in water is expressed as milli-grams per litre in terms of equivalent_______________?
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A. calcium carbonate

B. calcium hydroxide

C. sodium carbonate

D. magnesium carbonate

4482. If the sewage contains grease and fatty oils, these are removed in_________________?
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A. grit chambers

B. sedimentation tanks

C. skimming tanks

D. detritus tanks

4483. Which of the following sewers is preferred for combined system of sewage ?
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A. none of the above

B. circular sewer

C. rectangular sewer

D. egg shaped sewer
4484. The maximum permissible size of aggregates to be used in casting the ribs of a slab, is______________?
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A. 10 mm

B. 7.5 mm

C. 5 mm

D. 15 mm

4485. Columns may be made of plain concrete if their unsupported lengths do not exceed their least lateral dimension_______________?
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A. Two times

B. Three times

C. Four times

D. Five times

4486. If R and T are rise and tread of a stair spanning horizontally, the steps are supported by a wall on one side and by a stringer beam on the other side, the steps are designed as beams of width_______________?
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A. R + T

B. 2 + T2)

C. T R

D. R T

4487. A pre-stressed rectangular beam which carries two concentrated loads W at L/3 from either end, is provided with a bent tendon with tension P such that central one-third portion of the tendon remains parallel to the longitudinal axis, the maximum dip h is_____________________?
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A. WL/P

B. WL/2P

C. WL/4P

D. WL/3P
4488. If C is creep coefficient, f is original pre-stress in concrete, m is modular ratio, E is Youngs modulus of steel and e is shrinkage strain, the combined effect of creep and shrinkage is________________?
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A. (1 C)mf + eE

B. (1 C) mf eE

C. (C 1)mf eE

D. (C 1)mf + eE
4489. High strength concrete is used in pre-stressed member________________?
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A. To provide high bond stresses

B. All the above

C. To overcome high bearing stresses developed at the ends

D. To overcome bursting stresses at the ends

4490. Top bars are extended to the projecting parts of the combined footing of two columns Ldistance apart for a distance of_______________?
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A. 0.1 L from the outer edge of column

B. One -fourth the distance of projection

C. 0.1 L from the centre edge of column

D. Half the distance of projection

4491. The design of heel slab of a retaining wall is based on the maximum bending moment due to______________?
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A. Its own weight

B. Load of the surcharge, if any

C. Weight of the soil above it

D. All the above
4492. Enlarged head of a supporting column of a flat slab is technically known as______________?
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A. Drop panel

B. Supporting end of the column

C. Capital

D. Top of the column

4493. The transverse reinforcements provided at right angles to the main reinforcement_______________?
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A. All the above

B. Resist the temperature stresses

C. Distribute the load

D. Resist the shrinkage stress

4494. If A is the area of the foundation of a retaining wall carrying a load W and retaining earth of weight w per unit volume, the minimum depth (h) of the foundation from the free surface of the earth, is )/(1 + sin )]_________________?
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A. h = (W/Aw) [(1 )/(1 + sin )]

B. h W/Aw) [(1 )/(1 + sin )]

C. h = (W/Aw) [(1 + )/(1 + sin )]

D. h = (W/Aw) [(1

4495. If the tendon is placed at an rectangular beam (sectional top edge)________________?
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A. Is decreased by Pe/Z

B. Is increased by Pe/Z

C. Is increased by PZ/e

D. Remains unchanged

4496. If the bearing capacity of soil is 10 tonnes/cm2 and the projection of plain concrete footing from walls, is a cm, the depth D of footing is_______________?
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A. D = 0.775 a

B. D = 0.775 a

C. D = 0.0775 a

D. D = 0.775 a2

4497. The self-weight of the footing, is_____________?
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A. Not considered for calculating the upward pressure on footing

B. Also considered for calculating the upward pressure on footing

C. Not considered for calculating the area of the footing

D. Both B. and C

4498. The neutral axis of a T-beam exists_________________?
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A. Below the slab

B. At the bottom edge of the slab

C. All the above

D. Within the flange

4499. A pre-cast pile generally used, is______________?
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A. Square

B. Square with corners chamfered

C. Octagonal

D. Circular

4500. Minimum spacing between horizontal parallel reinforcement of the same size should not be less than________________?
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A. One diameter

B. 3 diameters

C. 2.5 diameters

D. 3.5 diameters