civil engineering MCQs – Page 39

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 Review each marked answer and report any item that may be outdated or unclear.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
761. In detennining stresses in frames by methods of sections, the frame is divided into two parts by an imaginary section drawn in such a way as not to cut more than___________________?
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A. four members with unknown forces of the frame

B. four members with two known forces

C. three members with known forces of the frame

D. two members with unknown forces of the frame

E. three members with unknown forces of the frame
762. On an absolutely rigid foundation base, the pressure will________________?
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A. Be zero at the centre of the foundation

B. Be more at the edges of the foundation

C. Not be uniform

D. Be uniform

763. For a circular slab carrying a uniformly distributed load, the ratio of the maximum negative to maximum positive radial moment, is___________________?
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A. 1

B. 2

C. 3

D. 5

764. The modular ratio m of a concrete whose permissible compressive stress is C, may be obtained from the equation.
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A. m = 2800/3C

B. m = 700/3C

C. m = 3500/3C

D. m = 1400/3C

765. A body of weight W on inclined plane of a being pulled up by a horizontal force P will be on the point of motion up the plane when P is equal to___________________?
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A. Wan(a-)

B. W

C. W sin (a + $)

D. Wtana

E. Wtan(a +
766. If the depth of actual neutral axis of a doubly reinforced beam______________?
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A. Is less than the depth of critical neutral axis, the steel in the tensile zone attains its maximum stress earlier

B. Is equal to the depth of critical neutral axis; the concrete and steel attain their maximum stresses simultaneously

C. Is greater than the depth of critical neutral axis, the concrete attains its maximum stress earlier

D. All the above
767. The advantage of reinforced concrete, is due to_______________?
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A. All the above

B. Fire-resisting and durability

C. Monolithic character

D. Economy because of less maintenance cost

768. The stem of a cantilever retaining wall which retains earth level with top is 6 m. If the angle of repose and weight of the soil per cubic metre are 30 and 2000 kg respectively, the effective width of the stem at the bottom, is_______________?
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A. 53.5

B. 51.5

C. 52.5

D. 54.5

769. If longitudinally spanning stairs are casted along with their landings, the maximum bending moment per metre width, is taken as___________________?
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A. wl/4

B. wl/10

C. wl/12

D. wl/8
770. If n = number of members andy = number of joints, then for a perfect frame, n =_______________?
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A. j-2

B. 2/ -4

C. j-l

D. 2/-3

E. /-2

771. Least force required to draw a body up the inclined plane is W sin (plane inclination + friction angle) applied in the direction__________________?
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A. unpredictable

B. vertically

C. along the plane

D. horizontally

E. at an angle equal to the angle of friction to the inclined plane
772. According to the steel beam theory of doubly reinforced beams______________?
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A. Tension is resisted by tension steel

B. All the above

C. Stress in tension steel equals the stress in compression steel

D. Compression is resisted by compression steel

773. On piles, the drop must be at least_______________?
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A. 120 cm

B. 140 cm

C. 80 cm

D. 100 cm

774. D Alemberts principle is used for___________________?
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A. designing safe structures

B. determining stresses in the truss

C. reducing the problem of kinetics to equivalent statics problem

D. stability of floating bodies

E. solving kinematic problems

775. The effective width of a column strip of a flat slab, is_______________?
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A. One-fourth the width of the panel

B. Diameter of the column

C. Half the width of the panel

D. Radius of the column

776. Design of R.C.C. simply supported beams carrying U.D.L. is based on the resultant B.M. at________________?
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A. Supports

B. Quarter span

C. Mid span

D. Every section

777. The centre of percussion of a solid cylinder of radius r resting on a horizontal plane will be______________?
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A. 2r/3

B. 3r/2

C. r/2

D. 3r/A

E. r/A

778. The radius of a bar bend to form a hook, should not be less than_______________?
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A. Four times the diameter

B. Thrice the diameter

C. Five times the diameter

D. Twice the diameter
779. If the ratio of long and short spans of a two way slab with corners held down is r, the actual reduction of B.M. is given by
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A. (5/6) (r/1 + r) M

B. (5/6) (r/1 + r4) M

C. (5/6) (r/1 + r) M

D. (5/6) (r/1 + r3) M

780. For initial estimate for a beam design, the width is assumed__________________?
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A. 1/30th of span

B. 1/25th of span

C. 1/20th of span

D. 1/15th of span