Explore topic-wise MCQs in Civil Engineering.

This section includes 267 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.

51.

A projectile is thrown at an angle a to the horizontal with α velocity v. It will have the maximum centripetal acceleration

A. at the start
B. at the top of the trajectory
C. as it strikes the ground
D. else where.
Answer» B. at the top of the trajectory
Discussion
52.

Pick up the correct statement from the following for the structure shown in below figure.

A. The horizontal reaction at A is 23t ←
B. The horizontal reaction at C is 23t →
C. The vertical reaction at A is zero
D. The vertical reaction at C is 2 t ↑
E. All the above.
Answer» F.
Discussion
53.

The velocity ratio of an inclined plane of inclination θ with horizontal for lifting a load is

A. sin θ
B. cos θ
C. tan θ
D. sec θ
E. cosec θ.
Answer» F.
Discussion
54.

The motion of a particle is described by the relation x = t2- 10t + 30, where x is in metres and t in seconds. The total distance travelled by the particle from t = 0 to t = 10 seconds would be

A. zero
B. 30 m
C. 50 m
D. 60 m
E. none of these.
Answer» B. 30 m
Discussion
55.

The c.g. of a thin hollow cone of height h, above its base lies on the axis, at a height of

A. [A].
B. [B].
C. [C].
D. [D].
Answer» D. [D].
Discussion
56.

The distance of the c.g. of a semi-circular arc of radius r from its diameter along the radius of symmetry, is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» E.
Discussion
57.

The c.g. of the shaded area of the below figure from the x-axis is

A. [A].
B. [B].
C. [C].
D. [D].
E. [E].
Answer» D. [D].
Discussion
58.

The resultant of two forces acting at right angles is 5 kgf and if they act at an angle of 60°, it is 37 kgf. The magnitudes of the forces are :

A. 2 kgf, 3 kgf
B. 3 kgf, 4 kgf
C. 4 kgf, 5 kgf
D. 5 kgf, 3 kgf.
Answer» C. 4 kgf, 5 kgf
Discussion
59.

μ is coefficient of friction. A wheeled vehicle travelling on a circular level track will slip and overturn simultaneously if the ratio of its wheel distance to the height of its centroid, is

A. μ
B. 2μ
C. 3μ
D. μ.
Answer» C. 3μ
Discussion
60.

A weight W is suspended at the free end of a light member hinged to a vertical wall. If the angle of inclination of the member with the upper wall is θ°, the force introduced in the member, is

A. W sec θ
B. W cos θ
C. W sin θ
D. W cosec θ
E. W tan θ.
Answer» B. W cos θ
Discussion
61.

The moment of intertia of a circular lamina of diameter d, about an axis perpendicular to the plane of the lamina and passing through its centre, is

A. [A].
B. [B].
C. [C].
D. [D].
E. [E].
Answer» E. [E].
Discussion
62.

Maximum efficiency of a screw jack for the angle of friction φ, is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» E.
Discussion
63.

If l is the span of a light suspension bridge whose each cable carries total weight (w) and the central dip is y, the horizontal pull at each support, is

A. [A].
B. [B].
C. [C].
D. wl.
Answer» C. [C].
Discussion
64.

Total no of instantaneous centres of a machine having n links, is

A. n/2
B. n
C. (n - 1)
D. [D].
Answer» E.
Discussion
65.

When a body of mass M1 is hanging freely and an other of mass M2 lying on a smooth inclined plane(α) are connected by a light indextensible string passing over a smooth pulley, the acceleration of the body of mass M1, will be given by

A. [A].
B. [B].
C. [C].
D. [D].
Answer» C. [C].
Discussion
66.

If the tension in a cable supporting a lift moving upwards is twice the tension when the lift is movng downwards, the acceleration of the lift, is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» C. [C].
Discussion
67.

u1 and u2 are the velocities of approach of two moving bodies in the same direction and their corresponding velocities of separation are v1 and v2. As per Newton's law of collision of elastic bodies, the coefficient of restitution (e) is given by

A. [A].
B. [B].
C. [C].
D. [D].
Answer» D. [D].
Discussion
68.

ω rad/sec is the angular velocity of a crank whose radius is r. If it makes θ° with inner dead centre and obliquity of the connecting rod l is φ, the velocity v of the piston, is given by the equation

A. ω2(l cos φ + r sin φ tan θ)
B. ω2(l sin φ + r cos φ tan θ)
C. ω(l sin φ + r cos φ tan θ)
D. ω2(l sin φ - r cos θ tan φ).
Answer» D. ω2(l sin φ - r cos θ tan φ).
Discussion
69.

If α and u are the angle of projection and initial velocity of a projectile respectively, the horizontal range of the projectile, is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» B. [B].
Discussion
70.

If α and u are angle of projection and initial velocity of a projectile respectively, the total time of flight, is given by

A. [A].
B. [B].
C. [C].
D. [D].
Answer» E.
Discussion
71.

If G is the Gauge of track, v is velocity of the moving vehicle, g is the acceleration due to gravity and r is the radius of a circular path, the required superelevation is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» E.
Discussion
72.

If v and ω are linear and angular velocities, the centripetal acceleration of a moving body along the circular path of radius r, will be

A. [A].
B. [B].
C. [C].
D. [D].
E. rω.
Answer» C. [C].
Discussion
73.

If α is the angular acceleration of a compound pendulum whose angular displace ment is θ, the frequency of the motion is

A. 2πα/θ
B. [B].
C. 4πα/θ
D. 2πα - θ.
Answer» C. 4πα/θ
Discussion
74.

In case of S.H.M. the period of oscillation(T), is given by

A. [A].
B. [B].
C. [C].
D. [D].
Answer» C. [C].
Discussion
75.

If a particle moves with a uniform angular velocity ω radians/sec along the circumference of a circle of radius r, the equation for the velocity of the particle, is

A. v = ω
B. y = ω y - r
C. v = ω
D. v = ω
Answer» E.
Discussion
76.

If the angle of projection is double the angle of inclination (α) of the plane on which particle is projected, the ratio of times of fligh up the inclined plane and down the inclined plane, will be

A. [A].
B. [B].
C. [C].
D. 2 cos α.
Answer» B. [B].
Discussion
77.

A body of weight w placed on an inclined plane is acted upon by a force P parallel to the plane which causes the body just to move up the plane. If the angle of inclination of the plane is θ and angle of friction is φ, the minimum value of P, is

A. [A].
B. [B].
C. [C].
D. [D].
Answer» C. [C].
Discussion
78.

A square hole is punched out of a circular lamina, the diagonal of the square being the radius of the circle. If r is the radius of the circle, the C.G. of the remainder from the corner of the square on the circumference will be

A. [A].
B. [B].
C. [C].
D. [D].
Answer» D. [D].
Discussion
79.

The C.G. of a hemisphere from its base measured along the vertical radius is at a distance of

A. [A].
B. [B].
C. [C].
D. [D].
E. R/2.
Answer» C. [C].
Discussion
80.

The resultant of two forces acting at right angles is 34 kg and acting at 60° is 70 kg. The forces are

A. 1 kg and 4 kg
B. 2 kg and 3 kg
C. 3 kg and 5 kg
D. 3 kg and 5 kg
E. 3 kg and 5 kg.
Answer» F.
Discussion
81.

If two equal forces of magnitude P act at an angle θ, their resultant, will be

A. P cos θ/2
B. 2P sin θ/2
C. P tan θ/2
D. 2P cos θ/2
E. P sin θ/2.
Answer» E. P sin θ/2.
Discussion
82.

If the resultant of two forces P and Q acting at an angle θ makes an angle α with P, then tan α equals

A. [A].
B. [B].
C. [C].
D. [D].
Answer» C. [C].
Discussion
83.

The resultant of two forces P and Q acting at an angle θ, is

A. P2 + Q2 + 2P sin θ
B. P2 + Q2 + 2PQ cos θ
C. P2 + Q2 + 2PQ tan θ
D. [D].
E. [E].
Answer» E. [E].
Discussion
84.

The height at which the end of a rope of length l should be tied so that a man pulling at the other end may have the greatest tendency to overturn the pillar, is

A. 137.5 cm4
B. 37.5 cm4.
C. l
Answer» D.
Discussion
85.

On a mass m describing a circular path of radius r, the centrifugal force

A. upward.
B. acts tangentially to the circular path
C. acts towards the centre of rotation
D. acts away from the centre of rotation
Answer» C. acts towards the centre of rotation
Discussion
86.

The centre of gravity of a plane lamina will not be at its geometrical centre if it is a

A. perpendicular to the wall at its upper end
B. zero at its upper end
C. none of these.
D. circle
Answer» E.
Discussion
87.

For the given values of initial velocity of projection and angle of inclination of the plane, the maximum range for a projectile projected upwards will be obtained, if the angle of projection is

A. 375 m
B. 400 m
C. 425 m.
D. α = -
Answer» C. 425 m.
Discussion
88.

The centre of gravity of a trapezoidal dam section whose top width is a, bottom width is b and the vertical side is a, from its vertical face is

A. 18
B. 20
C. 26
Answer» B. 20
Discussion
89.

The resultant of two forces acting at right angles is 5 kgf and if they act at an angle of 60°, it is 37 kgf. The magnitudes of the forces are :

A. The force of friction at which the body is just about to move.
B. 2 kgf, 3 kgf
C. 3 kgf, 4 kgf
D. 4 kgf, 5 kgf
Answer» C. 3 kgf, 4 kgf
Discussion
90.

The maximum velocity of a body vibrating with a simple harmonic motion of amplitude 150 mm and frequency 2 vibrations/sec, is

A. none of these.
B. 188.5 m/sec
C. 18.85 m/sec
D. 1.885 m/sec
Answer» D. 1.885 m/sec
Discussion
91.

Periodic time of a particle moving with simple harmonic motion is the time taken by the particle for

A. 2.0 m/sec.
B. half oscillation
C. quarter oscillation
D. complete oscillation
Answer» D. complete oscillation
Discussion
92.

If the gravitational accelerational at any place is doubled, the weight of a body, will

A. a variable acceleration
B. a variable retardation
C. none of these.
D. be reduced to half
Answer» C. none of these.
Discussion
93.

A load of 500 kg was lifted through a distance of 13 cm. by an effort of 25 kg which moved through a distance of 650 cm. The mechanical advantage of the lifting machine is

A. 45°
B. 60°
C. 90°.
D. 15
Answer» D. 15
Discussion
94.

The following is not a law of static friction :

A. is not changed but weight of the bob is decreased
B. none of these.
C. The force of friction always acts in a direction opposite to that in which the body tends to move
D. The force of friction is dependent upon the area of contact
Answer» B. none of these.
Discussion
95.

The reaction at the support A of the beam shown in below figure is

A. 2 t
B. 5.8 t
C. 0.2 t
D. 3.5 t.
Answer» B. 5.8 t
Discussion
96.

The resultant of two forces P and Q acting at an angle θ, is

A. none of these.
B. P2 + Q2 + 2P sin θ
C. P2 + Q2 + 2PQ cos θ
D. P2 + Q2 + 2PQ tan θ
Answer» E.
Discussion
97.

If a body moves in such a way that its velocity increases by equal amount in equal intervals of time, it is said to be moving with

A. m4
B. none of these.
C. a uniform retardation
D. a uniform acceleration
Answer» D. a uniform acceleration
Discussion
98.

For the system of the loads shown in below figure, the time required for the 6.6 kg load to fall on the edge, is

A. 1 sec.
B. 2 sec.
C. 3 sec.
D. 4 sec.
Answer» D. 4 sec.
Discussion
99.

The moment of inertia of the shaded portion of the area shown in below figure about the X-axis, is

A. none of these.
B. 229.34 cm4
C. 329.34 cm4
D. 429.34 cm4
Answer» D. 429.34 cm4
Discussion
100.

Periodic time of body moving with simple harmonic motion, is

A. 3 t
B. 2.5 t.
C. directly proportional to its angular velocity
D. directly porportional to the square of its angular velocity
Answer» E.
Discussion