civil engineering MCQs – Page 35

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 Review each marked answer and report any item that may be outdated or unclear.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

681. The water content of soil, which represents the boundary between plastic state and liquid state, is known as_________________?
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A. plastic limit

B. shrinkage limit

C. liquid limit

D. plasticity index

682. According to I.S. : 456, slabs which span in two directions with corners held down, are assumed to be divided in each direction into middle strips and edge strips such that the width of the middle strip, is______________?
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A. Three-fourth of the width of the slab

B. Four-fifth of the width of the slab

C. Half of the width of the slab

D. Two -third of the width of the slab

683. longitudinal bars and lateral stirrups, is__________________?
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A. None of these

B. Stress in concrete area of concrete + Stress in steel area of steel

C. Stress in steel area of steel

D. Stress in concrete area of concrete

684. The stresses developed in concrete and steel in reinforced concrete beam 25 cm width and 70 cm effective depth, are 62.5 kg/cm2 and 250 kg/cm 2 respectively. If m = 15, the depth of its neutral axis is_______________?
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A. 25 cm

B. 35 cm

C. 30 cm

D. 20 cm

685. A reinforced concrete cantilever beam is 3.6 m long, 25 cm wide and has its lever arm 40 cm. It carries a load of 1200 kg at its free end and vertical stirrups can carry 1800 kg. Assuming concrete to carry one-third of the diagonal tension and ignoring the weight of the beam, the number of shear stirrups required, is___________________?
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A. 35

B. 40

C. 45

D. 30

686. Which of the following is not a vector quantity_______________?
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A. acceleration

B. weight

C. force

D. velocity

E. moment

687. The diameter of longitudinal bars of a column should never be less than_____________?
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A. 10 mm

B. 12 mm

C. 8 mm

D. 6 mm

688. In a beam the local bond stress Sb, is equal to_______________?
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A. Leaver arm/(Bending moment Total perimeter of reinforcement)

B. Total perimeter of reinforcement/(Leaver arm Shear force)

C. Leaver arm/(Shear force Total perimeter of reinforcement)

D. Shear force/(Leaver arm Total perimeter of reinforcement)

689. A circular slab subjected to external loading, deflects to form a_________________?
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A. None of these

B. Paraboloid

C. Semi-hemisphere

D. Ellipsoid

690. 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. 20 cm

B. 75 cm

C. 40 cm

D. 30 cm

691. Dimensions of a beam need be changed if the shear stress is more than_______________?
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A. 25 kg/cm2

B. 20 kg/cm2

C. 15 kg/cm2

D. 10 kg/cm2

692. A foundation is called shallow if its depth, is________________?
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A. One-fourth of its width

B. Equal to its width

C. Three-fourth of its width

D. Half of its width

693. A retaining wall and is the horizontal earth pressure, the factor of safety If is weight of against sliding, is_____________?
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A. 1.5

B. 1.25

C. 2

D. 1

694. A sample of metal weighs 219 gms in air, 180 gms in water, 120 gms in an unknown fluid. Then which is correct statement about density of metal________________?
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A. metal is twice as dense as water

B. metal will float in water

C. none of the above

D. density of metal cant be determined

E. metal is twice as dense as unknown fluid

695. If the length of an intermediate span of a continuous slab is 5m, the length of the end span is kept_______________?
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A. 4.0 m

B. 3.0 m

C. 3.5 m

D. 4.5 m

696. bending moment of a simply supported slab is M Kg.cm, the effective depth of the If the maximum slab is (where Q is M.R. factor)________________?
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A. M/100Q

B. M/ Q

C. M/Q)

D. (M/100Q)

697. A column is regarded as long column if the ratio of its effective length and lateral dimension, exceeds_________________?
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A. 20

B. 25

C. 15

D. 10

698. In ideal machines________________?
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A. mechanical advantage is greater than velocity ratio

B. mechanical advantage is unity

C. none of the above.

D. mechanical advantage is less than velocity ratio

E. mechanical advantage is equal to velocity ratio

699. In a singly reinforced beam, if the permissible stress in concrete reaches earlier than that in steel, the beam section is called________________?
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A. Over reinforced section

B. Under-reinforced section

C. Economic section

D. Critical section

700. A pair of smiths tongs is an example of the lever of__________________?
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A. zeioth order

B. second order

C. first order

D. third order

E. fourth order

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