civil engineering MCQs – Page 43

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 Review each marked answer and report any item that may be outdated or unclear.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
841. The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is as per the principle of__________________?
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A. balance of force

B. forces

C. independence of forces

D. resolution of forces

E. dependence of forces

842. A raft foundation is provided if its area exceeds the plan area of the building by______________?
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A. 40%

B. 20%

C. 50 %

D. 10%

843. An under-reinforced section means_________________?
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A. Steel provided is insufficient

B. Steel provided on one face only

C. Steel is provided at the underside only

D. Steel will yield first
844. If q is the punching shear resistance per unit area a, is the side of a square footing for a column of side b, carrying a weight W including the weight of the footing, the depth D. of the footing from punching shear consideration, is____________________?
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A. D = W (a b)/4abq

845. In a combined footing for two columns carrying unequal loads, the maximum hogging bending moment occurs at
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A. Less loaded column

B. A point of the maximum shear force

C. A point of zero shear force

D. More loaded column

846. If a suspended body is struck at the centre of percussion, then the pressure on die axis passing through the point of suspension will be___________________?
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A. same as the force applied

B. infinity

C. maximum

D. minimum

E. zero
847. Cantilever retaining walls can safely be used for a height not more than_______________?
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A. 3 m

B. 4 m

C. 5 m

D. 6 m
848. Forces are called concurrent when their lines of action meet in_______________?
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A. one point

B. plane

C. two points

D. different planes

E. perpendicular planes

849. If the maximum dip of a parabolic tendon carrying tension P is h and the effective length of the pre-stressed beam is L, the upward uniform pressure will be________________?
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A. 8hp/l

B. 8hp/ l

C. 8hl/p

D. 8hl/p

850. A flat slab is supported_______________?
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A. On beams and columns

B. On columns monolithically built with slab

C. On columns

D. On beams

851. The breadth of a ribbed slab containing two bars must be between______________?
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A. 6 cm to 7.5 cm

B. 12 cm to 15 cm

C. 8 cm to 10 cm

D. 10 cm to 12 cm

852. If the size of a column is reduced above the floor, the main bars of the columns, are_____________?
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A. Bent inward at the floor level

B. Continued up

C. Stopped just below the floor level and separate lap bars provided

D. All the above
853. A heavy string attached at two ends at same horizontal level and when central dip is very small approaches the following curve___________________?
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A. hyperbola

B. circular arc

C. parabola

D. elliptical

E. catenary

854. A foundation rests on_______________?
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A. Base of the foundation

B. Sub-grade

C. Foundation soil

D. Both B. and C
855. In a singly reinforced beam, the effective depth is measured from its compression edge to_________________?
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A. Neutral axis of the beam

B. Tensile edge

C. Tensile reinforcement

D. Longitudinal central axis

856. If the shear stress in a R.C.C. beam is_______________?
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A. Equal or less than 5 kg/cm2, no shear reinforcement is provided

857. For stairs spanning l metres longitudinally between supports at the bottom and top of a flight carrying a load w per unit horizontal area, the maximum bending moment per metre width, is_______________?
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A. wl/12

B. wl/8

C. wl/16

D. wl/4

858. If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either__________________?
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A. meet in a point

B. be all parallel

C. none of the above

D. all the above are correct

E. at least two of them must meet

859. According to Lamis theorem________________?
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A. if three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two

B. three forces acting at a point will be in equilibrium

C. ection by the sides of a triangle, taken in order, they will be in equilibrium

D. if three forces acting upon a particle are represented in magnitude and

E. none of the above

F. three forces acting at a point can be represented by a triangle, each side being proportional to force

860. The co-efficient of friction depends upon________________?
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A. area of contact

B. nature of surfaces

C. ail of the above.

D. A. and B. above

E. shape of the surfaces