civil engineering MCQs – Page 31

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 Review each marked answer and report any item that may be outdated or unclear.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

601. The load carrying capacity of a helically reinforced column as compared to that of a tied column is about________________?
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A. 5% more

B. 10% less

C. 5% less

D. 10% more

602. Select the correct statement?
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A. The greater the unit weight, the greater is permeability

B. The greater the viscosity, the greater is permeability

C. The greater the unit weight, the smaller is permeability

D. Unit weight does not affect per-meability

603. According to ISI recommendations, the maximum depth of stress block for balanced section of a beam of effective depth d is__________________?
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A. 0.85 d

B. 0.55 d

C. 0.43 d

D. 0.68 d

604. Rise of water table above the ground surface causes________________?
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A. increase in pore water pressure but decrease in total stress

B. equal increase in pore water pressure and total stress

C. equal decrease in pore water pressure and total stress

D. decrease in pore water pressure but increase in total stress

605. Terzaghis bearing capacity factors Nc, Nq and Nr are functions of______________?
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A. cohesion only

B. angle of internal friction only

C. both cohesion and angle of internal friction

D. none of the above

606. In case the factor of safety against sliding is less than 1.5, a portion of slab is constructed downwards at the end of the heel slab, which is known as___________________?
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A. A cut-off wall

B. A key

C. All the above

D. A rib

607. If the ratio of the span to the overall depth does not exceed 10, the stiffness of the beam will ordinarily be satisfactory in case of a__________________?
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A. None of these

B. Continuous beam

C. Simply supported beam

D. Cantilever beam

608. A pre-stressed concrete member is preferred because___________________?
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A. All the above

B. Large size of long beams carrying large shear force need not be adopted

C. Removal of cracks in the members due to shrinkage

D. Its dimensions are not decided from the diagonal tensile stress

609. carrying a uniformly distributed load per metre length is suspended at two A pile of length points, the maximum, B.M. at the centre of the pile or at the points of suspension, is_________________?
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A. WL/47

B. WL/8

C. WL/16

D. WL/24

610. Select the incorrect statement ?
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A. Better control is achieved on the drainage of the soil in a triaxial compression test

B. In a direct shear box test, the plane of shear failure is predetermined

C. Unconfined compression test can be carried out on all types of soils

D. Stress distribution on the failure plane in the case of triaxial compression test is uniform

611. In a pre-stressed member it is advisable to use________________?
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A. Low strength concrete but high tensile steel

B. High strength concrete and high tensile steel

C. High strength concrete only

D. Low strength concrete only

612. Contact pressure beneath a rigid footing resting on cohesive soil is_________________?
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A. less at edges compared to middle

B. uniform throughout

C. none of the above

D. more at edges compared to middle

613. A retaining wall 6m high supports a backfill with a surcharge angle of 10. The back of the wall is inclined to the vertical at a positive batter angle of 5. If the angle of wall friction is 7, then the resultant active earth pressure will act at a distance of 2 m above the base and inclined to the horizontal at an angle of_________________?
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A. 7

B. 17

C. 10

D. 12

614. If the voids of a soil mass are full of air only, the soil is termed as_______________?
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A. air entrained soil

B. dehydrated soil

C. partially saturated soil

D. dry soil

615. In T-shaped R C. retaining walls, the main reinforcement in the stem is provided on______________?
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A. the front face in one direction

B. the front face in both directions

C. the inner face in one direction

D. the inner face in both directions

616. For better strength and stability, the fine grained soils and coarse grained soils are compacted respectively as____________________?
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A. dry of OMC and wet of OMC

B. dry of OMC and dry of OMC where OMC is optimum moisture content

C. wet of OMC and dry of OMC

D. wet of OMC and wet of OMC

617. Coefficient of consolidation of a soil is affected by_______________?
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A. compressibility

B. permeability

C. both compressibility and permeability

D. none of the above

618. If the water content of a fully saturated soil mass is 100%, then the voids ratio of the sample is________________?
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A. independent of specific gravity of soil

B. less than specific gravity of soil

C. equal to specific gravity of soil

D. greater than specific gravity of soil

619. The minimum thickness of the cover at the end of a reinforcing bar should not be less than twice the diameter of the bar subject to a minimum of___________________?
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A. 20 mm

B. 10 mm

C. 15 mm

D. 25 mm

620. Physical properties of a permeant which influence permeability are________________?
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A. viscosity only

B. unit weight only

C. both viscosity and unit weight

D. none of the above

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