Explore topic-wise MCQs in Civil Engineering.

This section includes 392 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.

201.

A two hinged parabolic arch of span l and rise h carries a load varying from zero at the left end to ω per unit run at the right end. The horizontal thrust is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» E.
Discussion
202.

The deflection curve for the portal frame shown in the given figure is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» E.
Discussion
203.

Shear centre of a half circular section of radius r and of constant thickness, lies at a distance of x from the centre where x is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» E.
Discussion
204.

The horizontal deflection of a parabolic curved beam of span 10 m and rise 3 m when loaded with a uniformly distributed load l t per horizontal length, is (where Ic is the M.I. at the crown, which varies as the slope of the arch).

A. [A].
B. [B].
C. [C].
D. [D].
E. [E].
Answer» E. [E].
Discussion
205.

The equation of a parabolic arch of span l and rise h, is given by

A. [A].
B. [B].
C. [C].
D. [D].
Answer» E.
Discussion
206.

The equivalent length of a column of length L, having one end fixed and other end hinged, is

A. 2L
B. L
C. [C].
D. [D].
Answer» E.
Discussion
207.

The equivalent length is of a column of length L having both the ends fixed, is

A. 2L
B. L
C. [C].
D. [D].
Answer» D. [D].
Discussion
208.

is the equation for Euler's crippling load if

A. both the ends are fixed
B. both the ends are hinged
C. one end is fixed and other end is free
D. one end is fixed and other end is hinged.
Answer» C. one end is fixed and other end is free
Discussion
209.

A short column (30 cm x 20 cm) carries a load P1 at 4 cm on one side and another load P2 at 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

A. [A].
B. [B].
C. [C].
D. [D].
Answer» D. [D].
Discussion
210.

A rectangular column shown in the given figure carries a load P having eccentricities ex and ev along X and Y axes. The stress at any point (x, y) is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» B. [B].
Discussion
211.

If the strain energy stored per unit volume in a hollow shaft subjected to a pure torque when t attains maximum shear stress fs the ratio of inner diameter to outer diameter, is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» D. [D].
Discussion
212.

For permissible shear stress fs, the torque transmitted by a thin tube of mean diameter D and wall thickness t, is

A. [A].
B. [B].
C. πD2t fs
D. [D].
Answer» B. [B].
Discussion
213.

If D and d are external and internal diameters of a circular shaft respectively, its polar moment of inertia, is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» E.
Discussion
214.

The force in CD of the truss shown in given figure, is

A. 3t compression
B. 3t tension
C. zero
D. 1.5t compression
E. 1.5t tension
Answer» D. 1.5t compression
Discussion
215.

The force in EC of the truss shown in the given figure, is

A. zero
B. 5t tension
C. 5t compression
D. 4t tension
E. None of these.
Answer» D. 4t tension
Discussion
216.

A simply supported uniform rectangular bar breadth b, depth d and length L, carries an isolated load W at its mid-span. The same bar experiences an extension e under same tensile load. The ratio of the maximum deflection to the elongation, is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» D. [D].
Discussion
217.

The deflection of a uniform circular bar of diameter d and length l, which extends by an amount e under a tensile pull W, when it carries the same load at its mid-span, is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» D. [D].
Discussion
218.

A simply supported beam A carries a point load at its midspan. An other identical beam B carries the same load but uniformly distributed over the entire span. The ratio of the maximum deflections of the beams A and B, will be

A. [A].
B. [B].
C. [C].
D. [D].
Answer» E.
Discussion
219.

The maximum deflection of a simply supported beam of span L, carrying an isolated load at the centre of the span ; flexural rigidity being EI, is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» E.
Discussion
220.

The ratio of the deflections of the free end of a cantilever due to an isolated load at l/3rd and 2/3rd of the span, is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» C. [C].
Discussion
221.

The maximum deflection due to a uniformly distributed load w/unit length over entire span of a cantilever of length l and of flexural rigidly EI, is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» D. [D].
Discussion
222.

A cantilever of length L is subjected to a bending moment M at its free end. If EI is the flexural rigidity of the section, the deflection of the free end, is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» E.
Discussion
223.

The total strain energy of a beam of length L, having moment of inertia of its section I, when subjected to a bending moment M, is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» D. [D].
Discussion
224.

A bar of square section of area a2 is held such that its one of its diameters is vertical. The maximum shear stress will develop at a depth h where h is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» C. [C].
Discussion
225.

A steel plate d x b is sandwiched rigidly between two timber joists each D x B/2 in section. The moment of resistance of the beam for the same maximum permissible stress σ in timber and steel will be (where Young's modulus of steel is m times that of the timber).

A. [A].
B. [B].
C. [C].
D. [D].
Answer» C. [C].
Discussion
226.

Keeping breadth constant, depth of a cantilever of length l of uniform strength loaded with uniformly distributed load w varies from zero at the free end and

A. at the fixed end
B. [B].
C. [C].
D. at the fixed end
Answer» C. [C].
Discussion
227.

The radius of gyration of a rectangular section (depth D, width B) from a centroidal axis parallel to the width is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» D. [D].
Discussion
228.

The radius of gyration of a section of area A and least moment of inertia I about the centroidal axis, is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» D. [D].
Discussion
229.

If Ix and Iy are the moments of inertia of a section about X and Y axes, the polar moment of inertia of the section, is

A. [A].
B. [B].
C. IX + IY
D. [D].
Answer» D. [D].
Discussion
230.

The ratio of the section modulus of a square section of side B and that of a circular section of diameter D, is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» C. [C].
Discussion
231.

The moment of inertia of a circular section about any diameter D, is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» E.
Discussion
232.

The moment of inertia of a rectangular section of width B and depth D about an axis passing through C.G. and parallel to its width is

A. [A].
B. [B].
C. [C].
D. [D].
E. [E].
Answer» D. [D].
Discussion
233.

If M, I, R, E, F, and Y are the bending moment, moment of inertia, radius of curvature, modulus of elasticity stress and the depth of the neutral axis at section, then

A. [A].
B. [B].
C. [C].
D. [D].
Answer» D. [D].
Discussion
234.

By applying the static equations i.e. ΣH = 0, ΣV = 0 and ΣM = 0, to a determinate structure, we may determine

A. supporting reactions only
B. shear forces only
C. bending moments only
D. internal forces only
E. all the above.
Answer» F.
Discussion
235.

A simply supported beam carries a varying load from zero at one end and w at the other end. If the length of the beam is a, the shear force will be zero at a distance x from least loaded point where x is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» D. [D].
Discussion
236.

The S.F. diagram of a loaded beam shown in the given figure is that of

A. a simply supported beam with isolated central load
B. a simply supported beam with uniformly distributed load
C. a cantilever with an isolated load at the free end
D. a cantilever with a uniformly distributed load.
Answer» E.
Discussion
237.

A material which obeys Hook's law, is subjected to direct stress σ0. At its elastic limit, the following statement is true,

A. Strain is equal to
B. Maximum shear stress =
C. Strain energy =
D. Shear strain energy =
E. All the above.
Answer» F.
Discussion
238.

If normal stresses due to longitudinal and transverse loads on a bar are σ1 and σ2 respectively, the normal component of the stress on an inclined plane θ° to the longitudinal load, is

A. σ1 sin θ x σ2 cos θ
B. σ1 sin θ2 + σ2 cos2 θ
C. [C].
D. [D].
Answer» C. [C].
Discussion
239.

If the normal stresses due to longitudinal and transverse loads on a bar are σ1 and σ2 respectively, the tangential component of the stress on an inclined plane through θ°, the longitudinal load is

A. σ1 sin θ + σ2 cos θ
B. σ1 sin θ2 + σ2 cos2 θ
C. [C].
D. [D].
Answer» D. [D].
Discussion
240.

The ratio of tangential and normal components of a stress on an inclined plane through θ° to the direction of the force, is :

A. sin θ
B. cos θ
C. tan θ
D. cos θ
E. sec θ
Answer» D. cos θ
Discussion
241.

The tangential component of stress on an plane inclined θ° to the direction of the force, may be obtained by multiplying the normal stress by

A. sin θ
B. cos θ
C. tan θ
D. sin θ cos θ
E. sin2θ
Answer» F.
Discussion
242.

The normal and tangential components of stress on an inclined plane through θ° to the direction of the force, will be equal if θ is

A. 45°
B. 30°
C. 60°
D. 90°
Answer» B. 30°
Discussion
243.

The normal component of a force inclined through θ° is obtained by multiplying the force by

A. sin θ
B. cos θ
C. tan θ
D. sin θ cos θ
E. sin2θ
Answer» E. sin2θ
Discussion
244.

A steel rod of sectional area 250 sq. mm connects two parallel walls 5 m apart. The nuts at the ends were tightened when the rod was heated to 100°C. If αsteel = 0.000012/C°, Esteel = 0.2 MN/mm2, the tensile force developed at a temperature of 50°C, is

A. 80 N/mm2
B. 100 N/mm2
C. 120 N/mm2
D. 150 N/mm2
Answer» D. 150 N/mm2
Discussion
245.

Two bars, one of steel and the other of copper having areas of cross-sections As and Ac, coefficient of expansion αs and αc and Young's Modulii Es and Es are rigidly connected together at the ends and subjected to temperature change of t°. If the length of the bars initially is L, the final extension δ of the two bars at t° temperature is given by

A. [A].
B. [B].
C. [C].
D. [D].
Answer» B. [B].
Discussion
246.

A compound bar consists of two bars of equal length. Steel bar cross-section is 3500 mm2 and that of brass bar is 3000 mm2. These are subjected to a compressive load 100,000 N. If Eb = 0.2 MN/mm2 and Eb = 0.1 MN/mm2, the stresses developed are:

A. σb = 10 N/mm2, σs = 20 N/mm2
B. σb = 8 N/mm2, σs = 16 N/mm2
C. σb = 6 N/mm2, σs = 12 N/mm2
D. σb = 5 N/mm2, σs = 10 N/mm2
Answer» B. σb = 8 N/mm2, σs = 16 N/mm2
Discussion
247.

Ab and Ac are the cross sections of bronze and copper bars of equal length, σb, σc are their respective stresses due to load P. If Pb and Pc are the loads shared by them, (where Eb and Ec are their modulii).

A. [A].
B. P = Pb + Pc
C. P = Ab σb + Ac σb
D. all the above
Answer» E.
Discussion
248.

A road of uniform cross-section A and length L is deformed by δ, when subjected to a normal force P. The Young's Modulus E of the material, is

A. [A].
B. [B].
C. [C].
D. [D].
E. [E].
Answer» D. [D].
Discussion
249.

If ΣH and ΣV are the algebraic sums of the forces resolved horizontally and vertically respectively, and ΣM is the algebraic sum of the moments of forces about any point, for the equilibrium of the body acted upon

A. ΣH = 0
B. ΣV = 0
C. ΣM = 0
D. all the above.
Answer» E.
Discussion
250.

A spring of mean radius 40 mm contains 8 action coils of steel (N = 80000 N/mm²), 4 mm in diameter. The clearance between the coils being 1 mm when unloaded, the minimum compressive load to remove the clearance, is

A. 5 N
B. 0 N
C. 5 N
D. 0 N
Answer» D. 0 N
Discussion