McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .
| 101. |
A screw jack used for lifting the loads is |
| A. | a reversible machine |
| B. | a non-reversible machine |
| C. | an ideal machine |
| D. | none of these |
| Answer» B. a non-reversible machine | |
| 102. |
The potential energy stord by a spring in compression, is called strain energy. |
| A. | Yes |
| B. | No |
| Answer» A. Yes | |
| 103. |
The coefficient of restitution for inelastic bodies is |
| A. | zero |
| B. | one |
| C. | between zero and one |
| D. | more than one |
| Answer» A. zero | |
| 104. |
Coefficient of friction is the ratio of the limiting friction to the normal reaction between the two bodies. |
| A. | Yes |
| B. | No |
| Answer» A. Yes | |
| 105. |
If a number of forces are acting at a point, their resultant will be inclined at an angle ? with the horizontal, such that |
| A. | tan ? = ?H / ?V |
| B. | tan ? = ?V / ?H |
| C. | tan ? = ?V x ?H |
| Answer» B. tan ? = ?V / ?H | |
| 106. |
Energy may be defined as the capacity of doing work. |
| A. | Correct |
| B. | Incorrect |
| Answer» A. Correct | |
| 107. |
The skidding away of the vehicle on a level circular path can be avoided if the force of friction between the wheels and the ground is |
| A. | less than |
| B. | greater than |
| Answer» B. greater than | |
| 108. |
The moment of inertia of a solid sphere of mass m and radius r is |
| A. | 2mr2 / 3 |
| B. | 2mr2 / 5 |
| C. | mr2 |
| D. | mr2 / 2 |
| Answer» B. 2mr2 / 5 | |
| 109. |
Two like parallel forces are acting at a distance of 24 mm apart and their resultant is 20 N. If the line of action of the resultant is 6 mm from any given force the two forces are |
| A. | 15 N and 5 N |
| B. | 20 N and 5 N |
| C. | 15 N and 10 N |
| D. | none of these |
| Answer» A. 15 N and 5 N | |
| 110. |
The range of projectile will be maximum for a given velocity of projectile, when the angle of projection (?) is |
| A. | ? / 2 |
| B. | 30? + ?/2 |
| C. | 45? + ?/2 |
| D. | 60? + ?/2 |
| Answer» C. 45? + ?/2 | |
| 111. |
Which of the following is a scalar quantity? |
| A. | Force |
| B. | Speed |
| C. | Velocity |
| D. | Acceleration |
| Answer» B. Speed | |
| 112. |
The maximum velocity of a particle moving with simple harmonic motion is |
| A. | ? |
| B. | ?r |
| C. | ?2r |
| D. | ?/r |
| Answer» B. ?r | |
| 113. |
A differential pulley block has larger and smaller diameters of 100 mm and 80 mm respectively. Its velocity ratio is |
| A. | 5 |
| B. | 10 |
| C. | 20 |
| D. | 40 |
| Answer» B. 10 | |
| 114. |
The coefficient of restitution for elastic bodies is one |
| A. | Right |
| B. | Wrong |
| Answer» B. Wrong | |
| 115. |
In ideal machines, mechanical advantage is |
| A. | equal to |
| B. | less than |
| C. | greater than |
| Answer» A. equal to | |
| 116. |
If the efficiency of a lifting machine is kept constant, its velocity ratio is |
| A. | directly |
| B. | inversely |
| Answer» A. directly | |
| 117. |
If the resultant of a number of forces acting on a body is zero, then the body will not be in equilibrium |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 118. |
The velocity ratio for the first system of pulleys is. Where n is the number of pulleys. |
| A. | n |
| B. | n2 |
| C. | 2n |
| D. | 2n - 1 |
| Answer» C. 2n | |
| 119. |
The angle which the normal reaction makes with the resultant reaction is called angle of friction. |
| A. | Agree |
| B. | Disagree |
| Answer» A. Agree | |
| 120. |
Which of the following statement is correct? |
| A. | The kinetic egergy of a body during impact remains constant. |
| B. | The kinetic energy of a body before impact is equal to the kinetic energy of a body after impact. |
| C. | The kinetic energy of a body before impact is less than the kinetic energy of a body after impact. |
| D. | The kinetic energy of a body before impact is more than the kinetic energy of a body after impact. |
| Answer» D. The kinetic energy of a body before impact is more than the kinetic energy of a body after impact. | |
| 121. |
If a number of coplaner forces acting at a point be in equilibrium, the sum of clockwise moments must be |
| A. | equal to |
| B. | less than |
| C. | greater than |
| Answer» A. equal to | |
| 122. |
An irregular body may have more than one centre of gravity. |
| A. | Yes |
| B. | No |
| Answer» A. Yes | |
| 123. |
The velocity of a particle moving with simple harmonic motion is |
| A. | zero |
| B. | minimum |
| C. | maximum |
| Answer» C. maximum | |
| 124. |
The polygon law of forces states that if a number of forces, acting simultaneously on a particle, be represented in magnitude and direction by the sides a polygon taken in order, then their resultant is represented in magnitude and direction by the closing side of the polygon, taken in opposite direction. |
| A. | Correct |
| B. | Incorrect |
| Answer» A. Correct | |
| 125. |
The efficiency of a lifting machine is the ratio of |
| A. | output to the input |
| B. | work done by the machine to the work done on the machine |
| C. | mechanical advantage to the velocity ratio |
| D. | all of the above |
| Answer» D. all of the above | |
| 126. |
The three forces of 100 N, 200 N and 300 N have their lines of action parallel to each other but act in the opposite directions. These forces are known as |
| A. | coplaner concurrent forces |
| B. | coplaner non-concurrent forces |
| C. | like parallel forces |
| D. | unlike parallel forces |
| Answer» D. unlike parallel forces | |
| 127. |
The moment of inertia of a square of side about its diagonal is |
| A. | a2 / 8 |
| B. | a3 / 12 |
| C. | a4 / 12 |
| D. | a4 / 16 |
| Answer» C. a4 / 12 | |
| 128. |
Joule is the unit of |
| A. | force |
| B. | work |
| C. | power |
| D. | energy |
| Answer» B. work | |
| 129. |
In railways, the super-elevation is expressed in terms of the difference of level between the two rails. |
| A. | True |
| B. | False |
| Answer» A. True | |
| 130. |
The moment of a force |
| A. | is the turning effect produced by a force, on the body, on which it acts |
| B. | is equal to the product of force acting on the body and the perpendicular distance of a point and the line of action of the force |
| C. | is equal to twice the area of the triangle, whose base is the line representing the force and whose vertex is the point, about which the moment is taken |
| D. | all of the above |
| Answer» D. all of the above | |
| 131. |
The moment of inertia of a sphere of mass m and radius r, about an axis tangential to it, is |
| A. | 2mr2 / 3 |
| B. | 2mr2 / 5 |
| C. | 7mr2 / 3 |
| D. | 7mr2 / 5 |
| Answer» D. 7mr2 / 5 | |
| 132. |
If three coplaner forces acting on a point are in equilibrium, then each force is proportional to the sine of the angle between the other two |
| A. | Right |
| B. | Wrong |
| Answer» A. Right | |
| 133. |
The centre of gravity a T-section 100 mm x 150 mm x 50 mm from its bottom is |
| A. | 50 mm |
| B. | 75 mm |
| C. | 87.5 mm |
| D. | 125 mm |
| Answer» C. 87.5 mm | |
| 134. |
The rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction in which the force acts. This statement is known as |
| A. | Newton's first law of motion |
| B. | Newton's second law of motion |
| C. | Newton's third law of motion |
| D. | none of these |
| Answer» B. Newton's second law of motion | |
| 135. |
The point, through which the whole weight of the body acts, irrespective of its position, is known as |
| A. | moment of inertia |
| B. | centre of gravity |
| C. | centre of percussion |
| D. | centre of mass |
| Answer» B. centre of gravity | |
| 136. |
The moment of inertia of a rectangular section 3cm wide and 4cm deep about X-X axis is |
| A. | 9 cm4 |
| B. | 12 cm4 |
| C. | 16 cm4 |
| D. | 20 cm4 |
| Answer» C. 16 cm4 | |
| 137. |
The angle of inclination of a vehicle when moving along a circular path |
| A. | depends |
| B. | does not depend |
| Answer» B. does not depend | |
| 138. |
A science teacher claimed that Newton's third law of motion is involved while studying the motion of rockets. His statement is |
| A. | justified |
| B. | not justified |
| Answer» A. justified | |
| 139. |
The forces, which meet at one point and their lines of action also lie on the same plane, are known as |
| A. | coplaner concurrent forces |
| B. | coplaner non-concurrent forces |
| C. | non-coplaner concurrent forces |
| D. | non-coplaner non-concurrent forces |
| Answer» A. coplaner concurrent forces | |
| 140. |
The law of motion involved in the recoil of gun is |
| A. | Newton's first law of motion |
| B. | Newton's second law of motion |
| C. | Newton's third law of motion |
| D. | none of these |
| Answer» C. Newton's third law of motion | |
| 141. |
The force, by which the body is attracted, towards the centre of the earth, is called |
| A. | impulsive force |
| B. | mass |
| C. | weight |
| D. | momentum |
| Answer» C. weight | |
| 142. |
The moment of inertia of a thin spherical shell of mass m and radius r, about its diameter is |
| A. | mr2 / 3 |
| B. | 2mr2 / 3 |
| C. | 2mr2 / 5 |
| D. | 3mr2 / 5 |
| Answer» B. 2mr2 / 3 | |
| 143. |
The total time taken by a projectile to reach maximum height and to return back to the ground, is known as time of flight. |
| A. | Yes |
| B. | No |
| Answer» A. Yes | |
| 144. |
If the gravitational acceleration at any place is doubled, then the weight of a body will be |
| A. | g / 2 |
| B. | g |
| C. | ?2 g |
| D. | 2g |
| Answer» D. 2g | |
| 145. |
The term 'centroid' is |
| A. | the same as centre of gravity |
| B. | the point of suspension |
| C. | the point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis |
| D. | none of the above |
| Answer» A. the same as centre of gravity | |
| 146. |
If three forces acting at a point are represented in magnitude and direction by the three sides of a triangle, taken in order, then the forces are in equilibrium |
| A. | Yes |
| B. | No |
| Answer» A. Yes | |
| 147. |
If a pendulum is taken 1 km below the earth surface in a mine, it will |
| A. | gain |
| B. | loose |
| Answer» A. gain | |
| 148. |
The ideal angle of banking provided on the curves on roads depends upon |
| A. | weight of the vehicle |
| B. | (velocity)2 of the vehicle |
| C. | nature of the road surface |
| D. | coefficient of friction between the road and vehicle contact point |
| Answer» B. (velocity)2 of the vehicle | |
| 149. |
The periodic time of a particle with simple harmonic motion is |
| A. | directly |
| B. | inversely |
| Answer» B. inversely | |
| 150. |
The acceleration of a body sliding down an inclined surface is |
| A. | g sin ? |
| B. | g cos ? |
| C. | g tan ? |
| D. | none of these |
| Answer» A. g sin ? | |
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