civil engineering MCQs – Page 45

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 Review each marked answer and report any item that may be outdated or unclear.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
881. If the loading on a pre-stressed rectangular beam, is uniformly distributed, the tendon to be provided should be_______________?
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A. Parabolic with convexity downward

B. Straight above centroidal axis

C. Parabolic with convexity upward

D. Straight below centroidal axis

882. The angle of internal friction of soil mass is the angle whose_______________?
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A. None of these

B. Cosine is equal to the ratio of the maximum resistance sliding on any internal inclined plane to the normal pressure acting on the plane

C. Tangent is equal to the rate of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane

D. Sine is equal to the ratio of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane

883. Coefficient of friction is the__________________?
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A. ratio of limiting friction and normal reaction

B. angle between normal reaction and the resultant of normal reaction and the limiting friction

C. tangent of angle of repose

D. the friction force acting when the body is in motion

E. the friction force acting when the body is just about to move

884. The C.G. of a solid hemisphere lies on the central radius 3r_______________?
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A. at distance from the plane base 3r

B. at distance from the plane base 3r

C. at distance from the plane base or

D. at distance from the plane base

E. at distance from the plane base 3r

885. If A is the area of the foundation of a retaining wall carrying a load W and retaining earth of weight w per unit volume, the minimum depth (h) of the foundation from the free surface of the earth, is )/(1 + sin )]_________________?
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A. h = (W/Aw) [(1 )/(1 + sin )]

B. h W/Aw) [(1 )/(1 + sin )]

C. h = (W/Aw) [(1

D. h = (W/Aw) [(1 + )/(1 + sin )]

886. For a number of columns constructed in a rcjw, the type of foundation provided, is_______________?
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A. Strip

B. Footing

C. Raft

D. Strap

887. Pick up the incorrect statement from the following. The intensity of horizontal shear stress at the elemental part of a beam section, is directly proportional to__________________?
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A. Moment of the beam section about its neutral axis

B. Area of the section

C. Distance of the C.G. of the area from its neutral axis

D. Shear force

888. Which of the following is not the unit of distance ?
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A. millimeter

B. light year

C. micron

D. milestone

E. angstrom

889. The effective span of a simply supported slab, is_______________?
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A. Distance between the centres of the bearings

B. Clear span plus effective depth of the slab

C. Clear distance between the inner faces of the walls plus twice the thickness of the wall

D. None of these

890. With usual notations the depth of the neutral axis of a balanced section, is given by______________?
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A. t/mc = (d + n)/n

B. mc/t = n/ (d n)

C. mc/t = (d n)/n

D. t/mc = (d n)/n

891. The horizontal portion of a step in a stairs case, is known as_________________?
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A. Flight

B. Tread

C. Rise

D. Winder

892. According to I.S. : 456 specifications, the safe diagonal tensile stress for M 150 grade concrete, is_____________?
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A. 5 kg/cm2

B. 20 kg/cm2

C. 10 kg/cm 2

D. 15 kg/cm2

893. Center of gravity of a solid cone lies on the axis at the height_______________?
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A. one-third of the total height above base

B. one-fourth of the total height above base

C. three-eighth of the total height above the base

D. none of the above

E. one-half of the total height above base

894. If the tendon is placed at an rectangular beam (sectional top edge)________________?
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A. Is decreased by Pe/Z

B. Is increased by PZ/e

C. Remains unchanged

D. Is increased by Pe/Z

895. If the length of a wall on either side of a lintel opening is at least half of its effective span L, the load W carried by the lintel is equivalent to the weight of brickwork contained in an equilateral triangle, producing a maximum bending moment____________________?
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A. WL/6

B. WL/2

C. WL/4

D. WL/8

896. A ribbed slab is provided for______________?
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A. A plain ceiling

B. Acoustic insulation

C. Thermal insulation

D. All the above
897. Center of gravity of a thin hollow cone lies on the axis at a height of________________?
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A. one-third of the total height above base

B. none of the above

C. one-half of the total height above base

D. three-eighth of the total height above the base

E. one-fourth of the total height above base

898. A part of the slab may be considered as the flange of the T-beam if__________________?
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A. Flange has adequate reinforcement transverse to beam

B. It is built integrally with the beam

C. It is effectively bonded together with the beam

D. All the above
899. Design of R.C.C. cantilever beams, is based on the resultant force at______________?
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A. Mid span

B. Fixed end

C. Free end

D. Mid span and fixed support

900. is the pre-stressed force applied to the tendon of a rectangular pre-stressed beam whose area of cross section is and sectional modulus is . The maximum stress in the beam, subjected to a maximum bending moment , is_________________?
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A. f = (P/A) + (Z/M)

B. f = (A/P) + (M/Z)

C. f = (P/A) + (M/6Z)

D. f = (P/A) + (M/Z)