Explore topic-wise MCQs in Civil Engineering.

This section includes 719 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.

501.

Two bars of different materials and same size are subjected to the same tensile force. If the bars have unit elongation in the ratio of 2:5, then the ratio of modulus of elasticity of the two materials will be

A. 2:5
B. 5:2
C. 4:3
D. 3:4
Answer» C. 4:3
Discussion
502.

The unit of Young's modulus is same as that of stress.

A. True
B. False
Answer» B. False
Discussion
503.

Modulus of rigidity may be defined as the ratio of

A. linear stress to lateral strain
B. lateral strain to linear strain
C. linear stress to linear strain
D. shear stress to shear strain
Answer» E.
Discussion
504.

Young's modulus may be defined as the ratio of

A. linear stress to lateral strain
B. lateral strain to linear strain
C. linear stress to linear strain
D. shear stress to shear strain
Answer» D. shear stress to shear strain
Discussion
505.

The change in length due to a tensile or compressive force acting on a body is given by (where P = Tensile or compressive force acting on the body, l = Original length of the body, A = Cross-sectional area of the body, and E = Young's modulus for the material of the body)

A. [A].
B. [B].
C. [C].
D. [D].
Answer» C. [C].
Discussion
506.

When a change in length takes place, the strain is known as

A. linear strain
B. lateral strain
C. volumetric strain
D. shear strain
Answer» B. lateral strain
Discussion
507.

The ratio of linear stress to the linear strain is called

A. modulus of rigidity
B. modulus of elasticity
C. bulk modulus
D. Poisson's ratio
Answer» C. bulk modulus
Discussion
508.

The unit of modulus of elasticity is same as those of

A. stress, strain and pressure
B. stress, force and modulus of rigidity
C. strain, force and pressure
D. stress, pressure and modulus of rigidity
Answer» E.
Discussion
509.

Which of the following is a proper sequence?

A. proportional limit, elastic limit, yielding, failure
B. elastic limit, proportional limit, yielding, failure
C. yielding, proportional limit, elastic limit, failure
D. none of the above
Answer» B. elastic limit, proportional limit, yielding, failure
Discussion
510.

Hook's law holds good up to

A. yield point
B. elastic limit
C. plastic limit
D. breaking point
Answer» C. plastic limit
Discussion
511.

When a body is subjected to two equal and opposite forces, acting tangentially across the resisting section, as a result of which the body tends to shear off across the section, the stress and strain induced is

A. tensile stress, tensile strain
B. compressive stress, compressive strain
C. shear stress, tensile strain
D. shear stress, shear strain
Answer» E.
Discussion
512.

When a body is subjected to two equal and opposite pulls, as a result of which the body tends to extend its length, the stress and strain induced is

A. compressive stress, tensile strain
B. tensile stress, compressive strain
C. tensile stress, tensile strain
D. compressive stress, compressive strain
Answer» D. compressive stress, compressive strain
Discussion
513.

Strain is equal to (where l = Original length, and δl = Change in length)

A. l/δl
B. δl/l
C. l.δl
D. l + δl
Answer» C. l.δl
Discussion
514.

The unit of stress in S.I. units is

A. N/mm2
B. kN/mm2
C. N/m2
D. any one of these
Answer» E.
Discussion
515.

Whenever some external system of forces acts on a body, it undergoes some deformation. As the body undergoes some deformation, it sets up some resistance to the deformation. This resistance per unit area to deformation, is called

A. strain
B. stress
C. pressure
D. modulus of elasticity
Answer» C. pressure
Discussion
516.

As compared to uniaxial tension or compression, the strain energy stored in bending is only

A. [A].
B. [B].
C. [C].
D. [D].
Answer» D. [D].
Discussion
517.

Shear deflection of a cantilever of length L, cross sectional area A and shear modulus G, subjected to w/m u.d.l., is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» B. [B].
Discussion
518.

Shear deflection of a cantilever of length L, cross sectional area A and shear modulus G, under a concentrated load W at its free end, is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» D. [D].
Discussion
519.

If S is the shear force at a section of an I-joist, having web depth d and moment of inertia I about its neutral axis, the difference between the maximum and mean shear stresses in the web is,

A. [A].
B. [B].
C. [C].
D. [D].
Answer» E.
Discussion
520.

For a channel section, the shear centre lies at a distance of

A. [A].
B. [B].
C. [C].
D. [D].
Answer» D. [D].
Discussion
521.

The width of a beam of uniform strength having a constant depth d length L, simply supported at the ends with a central load W is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» C. [C].
Discussion
522.

The energy stored in a beam of length L subjected to a constant B.M. is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» B. [B].
Discussion
523.

A cast iron T section beam is subjected to pure bending. For maximum compressive stress to be three times the maximum tensile stress, centre of gravity of the section from flange side is

A. h/4
B. h/3
C. h/2
D. 2/3 h.
Answer» B. h/3
Discussion
524.

A rectangular bar of width b and height h is being used as a cantilever. The loading is in a plane parallel to the side b. The section modulus is

A. [A].
B. [B].
C. [C].
D. none of these.
Answer» D. none of these.
Discussion
525.

An open-ended cylinder of radius r and thickness t is subjected to internal pressure p. The Young's modulus for the material is E and Poisson's ratio is μ. The longitudinal strain is

A. zero
B. [B].
C. [C].
D. none of these.
Answer» B. [B].
Discussion
526.

For a simply supported beam of length L, the bending moment M is described as M = a (x - x3/L2), 0 ≤ x < L; where a is a constant. The shear force will be zero at

A. the supports
B. x = L/2
C. x = L/3
D. x = L/3
Answer» D. x = L/3
Discussion
527.

A closely coiled helical spring of radius R, contains n turns and is subjected to an axial load W. If the radius of the coil wire is r and modulus of rigidity of the coil material is C, the stress developed in the helical spring is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» C. [C].
Discussion
528.

A closely coiled helical spring of radius R, contains n turns and is subjected to an axial load W. If the radius of the coil wire is r and modulus of rigidity of the coil material is C, the deflection of the coil is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» E.
Discussion
529.

A composite member shown in below figure was formed at 25°C and was made of two materials a and b. If the coefficient of thermal expansion of a is more than that of b and the composite member is heated upto 45°C, then

A. a will be in tension and b in compression
B. both will be in compression
C. both will be in tension
D. a will be in compression and b in tension.
Answer» E.
Discussion
530.

The structure shown in below figure is stable, if

A. [A].
B. x = 2y
C. x = y
D. 2x = y.
Answer» E.
Discussion
531.

The maximum deflection of

A. a simply supported beam carrying a uniformly increasing load from either end and having the apex at the mid span is
B. a fixed ended beam carrying a distributed load over the span is
C. a fixed ended beam carrying a concentrated load at the mid span is
D. a cantilever beam subjected to a moment M at the free end is
E. All the above.
Answer» F.
Discussion
532.

The bending moment at C of a portal frame shown in below figure is(1st distance 4m)

A. 8 t-m
B. 4 t-m
C. 28 t-m
D. 16 t-m
E. zero.
Answer» F.
Discussion
533.

In a simply supported beam (l + 2a) with equal overhangs (a) and carrying a uniformly distributed load over its entire length, B.M. at the middle point of the beam will be zero if

A. l = 2a
B. l = 4a
C. l < 2a
D. l > a
E. l > 3a.
Answer» B. l = 4a
Discussion
534.

If a circular beam of diameter d experiences a longitudinal strain and a lateral strain the volumetric strain is

A. [A].
B. [B].
C. [C].
D. [D].
E. none of these.
Answer» C. [C].
Discussion
535.

If a member carries a tensile force P on its area of cross-section A, the normal stress introduced on an inclined plane making an angle θ with its transverse plane, is

A. [A].
B. [B].
C. [C].
D. [D].
E. [E].
Answer» C. [C].
Discussion
536.

The stress in the wall of a cylinder in a direction normal to its longitudinal axis, due to a force acting along the circumference, is known as

A. yield stress
B. longitudinal stress
C. hoop stress
D. circumferential stress
E. ultimate stress.
Answer» D. circumferential stress
Discussion
537.

If p is the internal pressure in a thin cylinder of diameter d and thickness t, the developed hoop stress, is

A. [A].
B. [B].
C. [C].
D. [D].
E. [E].
Answer» B. [B].
Discussion
538.

If a shaft is rotating N revolutions per minute with an applied torque T kg-m, the horse power being transmitted by the shaft, is

A. [A].
B. [B].
C. [C].
D. [D].
E. none of these.
Answer» D. [D].
Discussion
539.

The tension coefficient of any member is

A. force divided by the length
B. tension divided by the length
C. tension per unit area
D. tension in the member.
Answer» C. tension per unit area
Discussion
540.

The stiffness factor for a prismatic beam of length L and moment of inertia I, is

A. [A].
B. [B].
C. [C].
D. [D].
E. [E].
Answer» B. [B].
Discussion
541.

If n is the ratio of internal and external diameters of a hollow shaft, the ratio of the weight of the hollow shaft and that of solid shaft of same strength, will be

A. [A].
B. [B].
C. [C].
D. [D].
Answer» C. [C].
Discussion
542.

If a shaft is simultaneously subjected to a toque T and a bending moment M, the ratio of maximum bending stress and maximum shearing stress is

A. [A].
B. [B].
C. [C].
D. [D].
E. [E].
Answer» D. [D].
Discussion
543.

If a solid shaft is subjected to a torque T at its end such that maximum shear stress does not exceed fz the diameter of the shaft will be

A. [A].
B. [B].
C. [C].
D. none of these.
Answer» D. none of these.
Discussion
544.

The ratio of the moments of resistance of a solid circular shaft of diameter D and a hollow shaft (external diameter D and internal diameter d), is

A. [A].
B. [B].
C. [C].
D. [D].
E. none of these.
Answer» B. [B].
Discussion
545.

Reactions at the supports of a structure can be determined by equating the algebraic sum of

A. horizontal forces to zero
B. vertical forces to zero
C. moment about any point to zero
D. all the above.
Answer» E.
Discussion
546.

The reaction at the supports will be vertical to the plane of the support if the frame structure rests on

A. roller supports
B. free supports
C. hinged supports
D. all the above.
Answer» E.
Discussion
547.

The rise of a parabolic arch at quarter points, is equal to

A. times the rise of the crown
B. times the rise of the crown
C. times the rise of the crown
D. times the rise of the crown
E. times the rise of the crown.
Answer» E. times the rise of the crown.
Discussion
548.

If a three hinged parabolic arch carries a uniformly distributed load on its entire span, every section of the arch resists.

A. compressive force
B. tensile force
C. shear force
D. bending moment.
Answer» B. tensile force
Discussion
549.

The greatest eccentricity which a load W can have without producing tension on the cross-section of a short column of external diameter D and internal diameter d, is

A. [A].
B. [B].
C. [C].
D. [D].
E. [E].
Answer» D. [D].
Discussion
550.

The length of a column, having a uniform circular cross-section of 7.5 cm diameter and whose ends are hinged, is 5 m. If the value of E for the material is 2100 tonnes/cm2, the permissible maximum crippling load will be

A. 1.288 tonnes
B. 12.88
C. 128.8 tonnes
D. 288
E. none of these.
Answer» C. 128.8 tonnes
Discussion