civil engineering MCQs – Page 41

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 Review each marked answer and report any item that may be outdated or unclear.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
801. The pitch of the main bars in a simply supported slab, should not exceed its effective depth by_____________?
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A. Four times

B. Five times

C. Three times

D. Six times
802. Long and short spans of a two way slab are l and l and load on the slab acting on strips parallel to lx and ly be wx and wy respectively. Accordingy to xRankine Grashoff theory___________________?
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A. (wx/wy) = (ly/lx)4

B. (wx/wy) = (ly/lx)

C. None of these

D. (wx/wy) = (ly/lx)

803. For M 150 mix concrete, according to I.S. specifications, local bond stress, is_________________?
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A. 20 kg/cm2

B. 15 kg/cm2

C. 10 kg/cm 2

D. 5 kg/cm2

804. If the length of a combined footing for two columns l metres apart is L and the projection on the left side of the exterior column is x, then the projection y on the right side of the exterior column, in order to have a uniformly distributed load, is (where is the distance of centre of gravity of column loads______________?
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A. y = L/2 (l + )

B. y = L (l ) )

C. y = L/2 (l )

D. y = L/2 + (l

805. The system in which high tensile alloy steel bars (silica manganese steel) are used as prestressing tendons, is known as________________?
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A. C.C.L. standard system

B. Magnel-Blaton system

C. Freyssinet system

D. Lee-McCall system
806. To ensure that the hogging bending moment at two points of suspension of a pile of length L equals the sagging moment at its centre, the distances of the points of suspension from either end, is________________?
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A. 0.307 L

B. 0.107 L

C. 0.207 L

D. 0.407 L

807. The ratio of the breadth to effective depth of a beam is kept_______________?
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A. 0.7

B. 0.25

C. 0.50

D. 0.75

808. 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 a2

B. D = 0.775 a

C. D = 0.0775 a

D. D = 0.775 a
809. The number of treads in a flight is equal to_______________?
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A. Risers minus one

B. Risers plus one

C. Risers in the flight

D. None of these

810. A singly reinforced concrete beam of 25 cm width and 70 cm effective depth is provided with 18.75 cm2 steel. If the modular ratio (m) is 15, the depth of the neutral axis, is_________________?
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A. 25 cm

B. 35 cm

C. 20 cm

D. 30 cm
811. The section of a reinforced beam where most distant concrete fibre in compression and tension in steel attains permissible stresses simultaneously, is called_________________?
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A. All the above

B. Economic section

C. Critical section

D. Balanced section

812. If the modular ratio is , steel ratio is and overall depth of a beam is , the depth of the critical neutral axis of the beam, is___________________?
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A. [(r m)/m] d

B. [m/(m r)] d

C. [m/(m + r)] d

D. [(m + r)/ m] d

813. Forces are called coplanar when all of them acting on body lie in________________?
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A. one plane

B. different points

C. one point

D. perpendicular planes

E. different planes

814. Pick up the incorrect statement from the following?
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A. None of these

B. In the stem of a retaining wall, reinforcement is provided near the earth side

C. In the toe slab of a retaining wall, reinforcement is provided at the bottom of the slab

D. In the heel slab of a retaining wall, reinforcement is provided at the top of the slab

815. According to principle of transmissibility of forces, the effect of a force upon a body is_______________?
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A. none of the above

B. different at different points in its line of action

C. minimum when it acts at the C.G. of the body

D. the same at every point in its line of action

E. maximum when it acts at the center of gravity of a body

816. foundation is assumed as The weight of a_____________?
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A. 10% of wall weight

B. 5% of wall weight

C. 12% of wall weight

D. 7% of wall weight

817. carrying a uniformly distributed load per metre length is suspended at the A pile of length centre and from other two points 0.15 L from either end ; the maximum hogging moment will be_______________?
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A. WL/90

B. WL/30

C. WL/60

D. WL/15

818. If a rectangular pre-stressed beam of an effective span of 5 meters and carrying a total load 3840 kg/m, is designed by the load balancing method, the central dip of the parabolic tendon should be_________________?
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A. 5 cm

B. 15 cm

C. 10 cm

D. 20 cm

819. According to I.S.: 456, 1978 the thickness of reinforced concrete footing on piles at its edges, is kept less than______________?
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A. 10 cm

B. 15 cm

C. 5 cm

D. 20 cm

820. The angle which an inclined plane makes with the horizontal when a body placed on it is about to move down is known as angle of__________________?
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A. repose

B. static friction

C. limiting friction

D. kinematic friction

E. friction