civil engineering MCQs – Page 282

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 Review each marked answer and report any item that may be outdated or unclear.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
5621. A shaft subjected to a bending moment M and a torque T, experiences__________________?
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A. Maximum bending stress = 32M d3

B. Maximum shear stress = 16 T d3

C. Both A. and B.

D. Neither A. nor B.

5622. m1 and m2 are the members of two individual simple trusses of a compound truss. The compound truss will be rigid and determinate if__________________?
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A. m = m1 + m2

B. m = m1 + m2 + 1

C. m = m + m + 3

D. m = m1 + m2 + 2

5623. A simply supported beam which carries a uniformly distributed load has two equal overhangs. To have maximum B.M. produced in the beam least possible, the ratio of the length of the overhang to the total length of the beam, is_________________?
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A. 0.307

B. 0.508

C. 0.407

D. 0.207
5624. A short column (30 cm 20 cm) carries a load P 1 at 4 cm on one side and another load P2at 8 cm on the other side along a principal section parallel to longer dimension. If the extreme intensity on either side is same, the ratio of P1 to P2 will be_________________?
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A. 8/5

B. 3-Feb

C. 8-May

D. 2-Mar

5625. The ratio of circumferential stress to the longitudinal stress in the walls of a cylindrical shell, due to flowing liquid, is__________________?
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A. 2

C. 1

D. 1

5626. The eccentricity (e) of a hollow circular column, external diameter 25 cm, internal diameter 15 cm for an eccentric load 100 t for non-development of tension, is__________________?
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A. 4.25 cm

B. 2.75 cm

C. 3.00 cm

D. 3.50 cm

5627. The force in CD of the truss shown in given figure, is________________?
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A. 3t compression

B. Zero

C. 1.5t compression

D. 3t tension

5628. The maximum bending moment for a simply supported beam with a uniformly distributed load w/unit length, is_________________?
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A. WI/8

B. WI/4

C. WI/2

D. WI/12

5629. Principal planes are subjected to_________________?
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A. Tangential stresses only

B. None of these

C. Normal stresses as well as tangential stresses

D. Normal stresses only
5630. The assumption in the theory of bending of beams is_________________?
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A. Material is homogeneous

B. Material is isotropic

C. Youngs modulus is same in tension as well as in compression

D. All the above
5631. The greatest load which a spring can carry without getting permanently distorted, is called_________________?
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A. Proof resilience

B. Stiffness

C. Proof stress

D. Proof load
5632. A cantilever of length 2 cm and depth 10 cm tapers in plan from a width 24 cm to zero at its free end. If the modulus of elasticity of the material is 0.2 106 N/mm2, the deflection of the free end, is________________?
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A. 3 mm

B. 5 mm

C. 4 mm

D. 2 mm

5633. Stress may be defined as_________________?
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A. None of these

B. Force per unit length

C. Force per unit area

D. Force per unit volume

5634. d constant, the width of a cantilever of length l of uniform strength loaded with Keeping the depth a uniformly distributed load w varies from zero at the free end and________________?
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A. (5w/ l at the fixed end

B. (3w/ l at the fixed end

C. (2w/ l at the fixed end

D. (3w/ l at the fixed end

5635. In the truss shown in given figure, the force in member BD is______________?
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A. 100 t compressive

B. Zero

C. 100 t tensile

D. Indeterminate

5636. Y are the bending moment, moment of inertia, radius of curvature, modulus of If M, I, R, E, F, and elasticity stress and the depth of the neutral axis at section, then________________?
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A. I/M = R/E = F/Y

B. M/I = E/R = E/Y

C. M/I = R/E = F/Y

D. M/I = E/R = Y/F

5637. The equivalent length of a column of length L having one end fixed and the other end free, is______________?
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A. 2L

B. L/2

C. L

D. L

5638. The stiffness of the close coil helical spring is_________________?
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A. d4N/4D3n

B. 4D3N/d4n

C. 8D3N/d4n

D. d4N/8D3n
5639. The load on a spring per unit deflection, is called______________?
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A. Proof stress

B. Proof load

C. Proof resilience

D. Stiffness
5640. If Q is load factor, S is shape factor and F is factor of safety in elastic design, the following_______________?
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A. Q = S + F

B. Q = F S

C. Q = S F

D. Q = S F