MCQOPTIONS
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MCQOPTIONS
This section includes 374 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
The direction of projection should bisect the angle between the inclined plane and the vertical for a range of a projectile on inclined plane |
| A. | To be zero |
| B. | To be maximum |
| C. | To be minimum |
| D. | None of these |
| Answer» C. To be minimum | |
| 102. |
The frequency of oscillation on moon as compared to that on earth, will be |
| A. | 2.44 times more |
| B. | 2.44 times less |
| C. | 3 times less |
| D. | 3 times more |
| Answer» C. 3 times less | |
| 103. |
The time period of a simple pendulum depends on(i) Mass of suspended particle(ii) Length of the pendulum(iii) Acceleration due to gravity |
| A. | Only (i) |
| B. | Both (ii) and (iii) |
| C. | Both (i) and (iii) |
| D. | All are correct |
| Answer» C. Both (i) and (iii) | |
| 104. |
The piston of a steam engine moves with a simple harmonic motion. The crank rotates 120 r.p.m. and the stroke length is 2 meters. The linear velocity of the piston when it is at a distance of 0.5 metre from the centre, is |
| A. | 5.88 m/sec |
| B. | 8.88 m/sec |
| C. | 10.88 m/sec |
| D. | 12.88 m/sec |
| Answer» D. 12.88 m/sec | |
| 105. |
The Centre of gravity of a 10 × 15 × 5 cm T section from its bottom, is |
| A. | 7.5 cm |
| B. | 5.0 cm |
| C. | 8.75 cm |
| D. | 7.85 cm |
| Answer» D. 7.85 cm | |
| 106. |
An ordinate in a funicular polygon represents |
| A. | Shear force |
| B. | Resultant force |
| C. | Bending moment |
| D. | Equilibrium |
| Answer» D. Equilibrium | |
| 107. |
The angle of projection for a range is equal to the distance through which the particle would have fallen in order to acquire a velocity equal to the velocity of projection, will be |
| A. | 30° |
| B. | 45° |
| C. | 60° |
| D. | 75° |
| Answer» E. | |
| 108. |
If a projectile is fired with an initial velocity of 10 m/sec at an angle of 60° to the horizontal, its horizontal and vertical velocity at the highest point of trajectory are |
| A. | 0 and 5 m/sec |
| B. | 5 m/sec and 0 |
| C. | 5√3 m/sec and 0 |
| D. | 5 and 5√3 m/sec |
| Answer» C. 5√3 m/sec and 0 | |
| 109. |
In a lifting machine with efficiency 60%, an effort of 200 N is required to raise a load of 6 kN. The velocity ratio of the machine is |
| A. | 30 |
| B. | 50 |
| C. | 60 |
| D. | 80 |
| Answer» C. 60 | |
| 110. |
For perfectly elastic bodies, the value of coefficient of restitution is |
| A. | Zero |
| B. | 0.5 |
| C. | 1.0 |
| D. | Between 0 and 1 |
| Answer» D. Between 0 and 1 | |
| 111. |
Maximum efficiency of a screw jack for the angle of friction θ, is |
| A. | sin θ/(1 + sin θ) |
| B. | (1 - sin θ)/sin θ |
| C. | (1 + sin θ)/(1 - sin θ) |
| D. | (1 - sin θ)/(1 + sin θ) |
| Answer» E. | |
| 112. |
For a simple pendulum, time period for a beat, is |
| A. | π √(l/g) |
| B. | π √(2l/g) |
| C. | π √(g/2l) |
| D. | π √(l/2g) |
| Answer» B. π √(2l/g) | |
| 113. |
The moment of inertia of a hollow circular section whose external diameter is 8 cm and internal diameter is 6 cm, about centroidal axis, is |
| A. | 437.5 cm⁴ |
| B. | 337.5 cm⁴ |
| C. | 237.5 cm⁴ |
| D. | 137.5 cm⁴ |
| Answer» E. | |
| 114. |
If y is force and x is velocity, then dimensions of —=r are dx2 |
| A. | M’^T’ |
| B. | M’L-‘T0 |
| C. | M’L-‘T1 |
| D. | M2L’T3 |
| Answer» C. M’L-‘T1 | |
| 115. |
Engineer's units of force, is |
| A. | Newton in absolute units |
| B. | Dyne in absolute units |
| C. | Newton and dyne in absolute units |
| D. | All the above |
| Answer» B. Dyne in absolute units | |
| 116. |
The inherent property of a body which offers reluctance to change its state of rest or uniform motion, is |
| A. | Weight |
| B. | Mass |
| C. | Inertia |
| D. | Momentum |
| Answer» D. Momentum | |
| 117. |
The locus of the instantaneous centre of a moving rigid body, is |
| A. | Straight line |
| B. | Involute |
| C. | Centroid |
| D. | Spiral |
| Answer» D. Spiral | |
| 118. |
A system of coplanar forces is in equilibrium when |
| A. | Force polygon closes |
| B. | Funicular polygon closes |
| C. | Both force polygon" and funicular polygon close |
| D. | All the forces are concurrent |
| Answer» D. All the forces are concurrent | |
| 119. |
Minimum pull in a suspended cable with supports at two ends is equal to |
| A. | Horizontal thrust |
| B. | Support reactions |
| C. | Resultant of horizontal thrust and support reaction |
| D. | Half the weight of the cable |
| Answer» B. Support reactions | |
| 120. |
A 49 kg lady stands on a spring scale in an elevator. During the first 5 sec, starting from rest, the scale reads 69 kg. The velocity of the elevator will be |
| A. | 10 m/sec |
| B. | 15 m/sec |
| C. | 20 m/sec |
| D. | 25 m/sec |
| Answer» D. 25 m/sec | |
| 121. |
For a simple pendulum, the period of one oscillation is |
| A. | 2π √(l/2g) |
| B. | 2π √(2g/l) |
| C. | 2π √(l/g) |
| D. | 2π √(g/2l) |
| Answer» D. 2π √(g/2l) | |
| 122. |
The length of a Second's pendulum, is |
| A. | 99.0 cm |
| B. | 99.4 cm |
| C. | 100 cm |
| D. | 101 cm |
| Answer» C. 100 cm | |
| 123. |
A ladder of weight 'w' rests against a smooth vertical wall, and rests on rough horizontal ground, the coefficient of friction between the ladder and the ground being 1/4. The maximum angle of inclination of the ladder to the vertical, if a man of weight 'w' is to walk to the top of it safely, is tan'1 x, where x is |
| A. | 1/4 |
| B. | 1/3 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 124. |
A shell travelling with a horizontal velocity of 100 m/sec explodes and splits into two parts, one of mass 10 kg and the other of 15 kg. The 15 kg mass drops vertically downward with initial velocity of 100 m/sec and the 10 kg mass begins to travel at an angle to the horizontal of tan”1 x, where x is |
| A. | 3/4 |
| B. | 4/5 |
| C. | 5/3 |
| D. | 3/5 |
| Answer» E. | |
| 125. |
If the given forces P₁, P₂, P₃ and P₄ are such that the force polygon does not close, then the system will |
| A. | Be in equilibrium |
| B. | Always reduce to a resultant force |
| C. | Always reduce to a couple |
| D. | Both (A) and (C) |
| Answer» C. Always reduce to a couple | |
| 126. |
Minimum potential energy of a system will be in the position of |
| A. | Stable equilibrium |
| B. | Unstable equilibrium |
| C. | Neutral equilibrium |
| D. | All of the above |
| Answer» B. Unstable equilibrium | |
| 127. |
If the tension in a cable supporting a lift moving upwards is twice the tension when the lift is moving downwards, the acceleration of the lift, is |
| A. | g/2 |
| B. | g/3 |
| C. | g/4 |
| D. | g/5 |
| Answer» C. g/4 | |
| 128. |
A heavy ladder resting on a floor and against a vertical wall may not be in equilibrium, if |
| A. | Floor is smooth and the wall is rough |
| B. | Floor is rough and the wall is smooth |
| C. | Floor and wall both are smooth surfaces |
| D. | Floor and wall both are rough surfaces |
| Answer» D. Floor and wall both are rough surfaces | |
| 129. |
The ratio of unit of force in gravitational system to that in absolute system is (where ‘g’ is acceleration due to gravity) |
| A. | 1 |
| B. | g |
| C. | 1/g |
| D. | none of the above |
| Answer» C. 1/g | |
| 130. |
A solid sphere of mass M and radius R rolls down a plane inclined at 0 with the horizontal. The acceleration of sphere is (where g is acceleration due to gravity) |
| A. | (1/3) g sin0 |
| B. | (2/5) g sin 0 |
| C. | (3/7) g sin 0 |
| D. | (5/7) g sin0 |
| Answer» E. | |
| 131. |
The unit of rotational inertia of a body in C.G.S system is |
| A. | cm⁴ |
| B. | kg.cm² |
| C. | gm.cm² |
| D. | gm.cm3 |
| Answer» D. gm.cm3 | |
| 132. |
‘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) | |
| 133. |
The load shared by the member BC of the structure shown in below figure is |
| A. | 23 t |
| B. | 32 t |
| C. | 4 t |
| D. | 3 t |
| Answer» D. 3 t | |
| 134. |
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 | |
| 135. |
The reaction at the central support B of the beam ABC hinged at D shown in below figure is |
| A. | 2 t |
| B. | 5.8 t |
| C. | 0.2 t |
| D. | 3.5 t |
| Answer» C. 0.2 t | |
| 136. |
The reaction at the support D of the continuous beam ABCD, hinged at two points shown in below figure is |
| A. | 1.6 t ↑ |
| B. | 1.6 t ↓ |
| C. | 0.5 t ↑ |
| D. | 0.5 t ↓ |
| Answer» C. 0.5 t ↑ | |
| 137. |
The reaction at the support B of the beam shown in below figure is |
| A. | 1.6 t |
| B. | 9.6 t |
| C. | 8.5 t |
| D. | 0.5 t |
| Answer» D. 0.5 t | |
| 138. |
The ratio of the reactions RA and RB of a simply supported beam shown in below figure is |
| A. | 0.50 |
| B. | 0.40 |
| C. | 0.67 |
| D. | 1.00 |
| Answer» E. | |
| 139. |
Power can be expressed as |
| A. | Work/energy |
| B. | Work/time |
| C. | Work × time |
| D. | Work/distance |
| Answer» C. Work × time | |
| 140. |
A retarding force on a body does not |
| A. | Change the motion of the body |
| B. | Retard the motion of the body |
| C. | Introduce the motion of the body |
| D. | None of these |
| Answer» C. Introduce the motion of the body | |
| 141. |
‘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. | e = v₁ - v₂/u₂ - u₁ |
| B. | e = u₂ - u₁/v₁ - v₂ |
| C. | e = v₂ - v₁/u₁ - u₂ |
| D. | e = v₁ - v₂/u₂ + u₁ |
| Answer» D. e = v₁ - v₂/u₂ + u₁ | |
| 142. |
A block in the shape of a parallelepiped of sides 1m × 2m × 3m lies on the surface. Which of the faces gives maximum stable block? |
| A. | 1 m × 2 m |
| B. | 2 m × 3 m |
| C. | 1 m × 3 m |
| D. | Equally stable on all faces |
| Answer» C. 1 m × 3 m | |
| 143. |
A stone was thrown vertically upwards from the ground with a velocity of 50 m/sec. After 5 seconds another stone was thrown vertically upwards from the same place. If both the stones strike the ground at the same time, then the velocity with which the second stone was thrown should be (Assume g = 10 m/sec²) |
| A. | 15 m/sec |
| B. | 25 m/sec |
| C. | 40 m/sec |
| D. | 50 m/sec |
| Answer» C. 40 m/sec | |
| 144. |
A car goes round a curve of radius 100 m at 25 m/sec. The angle to the horizontal at which the road must be banked to prevent sideways friction on the car wheels is tan"1 x, where x is (Assume g = 10 m/sec²) |
| A. | 3/8 |
| B. | 1/2 |
| C. | 9/5 |
| D. | 5/8 |
| Answer» E. | |
| 145. |
A projectile has maximum range of 40 m on a horizontal plane. If angle of projection is a and the time of flight is 1 second, then sin a must be about (Assume g = 10 m/sec²) |
| A. | 1/4 |
| B. | 1/3 |
| C. | 1/2 |
| D. | 1/5 |
| Answer» B. 1/3 | |
| 146. |
Energy may be defined as |
| A. | Power of doing work |
| B. | Capacity of doing work |
| C. | Rate of doing work |
| D. | All the above |
| Answer» C. Rate of doing work | |
| 147. |
Kinetic friction may be defined as |
| A. | Friction force acting when the body is just about to move |
| B. | Friction force acting when the body is in motion |
| C. | Angle between normal reaction and resultant of normal reaction and limiting friction |
| D. | Ratio of limiting friction and normal reaction |
| Answer» C. Angle between normal reaction and resultant of normal reaction and limiting friction | |
| 148. |
If a particle is projected inside a horizontal tunnel which is 554 cm high with a velocity of 60 m per sec, the angle of projection for maximum range, is |
| A. | 8° |
| B. | 9° |
| C. | 10° |
| D. | 11° |
| Answer» D. 11° | |
| 149. |
If two forces each equal to ‘T’ in magnitude act at right angles, their effect may be neutralized by a third force acting along their bisector in opposite direction whose magnitude will be |
| A. | 2 T |
| B. | 1/2 T |
| C. | √2 T |
| D. | 3 T |
| Answer» D. 3 T | |
| 150. |
A force P of 50 N and another force Q of unknown magnitude act at 90° to each other. They are balanced by a force of 130 N. The magnitude of Q is |
| A. | 60 N |
| B. | 80 N |
| C. | 100 N |
| D. | 120 N |
| Answer» E. | |