McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .
| 1. |
If three forces acting at a point be represented in magnitude and direction by the three sides of a triangle, taken in order, the forces shall be in equilibrium. |
| A. | TRUE |
| B. | False |
| Answer» A. TRUE | |
| 2. |
In order to double the period of simple pendulum, the length of the string should be |
| A. | halved |
| B. | doubled |
| C. | quadrupled |
| Answer» C. quadrupled | |
| 3. |
The unit of angular acceleration is |
| A. | N - m |
| B. | m / s |
| C. | m / s2 |
| D. | rad / s2 |
| Answer» D. rad / s2 | |
| 4. |
The loss of kinetic energy due to direct impact of two bodies |
| A. | depends |
| B. | does not depend |
| Answer» A. depends | |
| 5. |
If a given force (or a given system of forces) acting on a body |
| A. | change |
| B. | does not change |
| Answer» B. does not change | |
| 6. |
For any system of coplaner forces, the condition of equilibrium is that the |
| A. | algebraic sum of the horizontal components of all the forces should be zero |
| B. | algebraic sum of the vertical components of all the forces should be zero |
| C. | algebraic sum of moments of all the forces about any point should be zero |
| D. | all of the above |
| Answer» D. all of the above | |
| 7. |
In a single threaded worm and worm wheel, the number of teeth on the worm is 50. The diameter of the effort wheel is 100 mm and that of load drum is 50 mm. The velocity ratio is |
| A. | 50 |
| B. | 100 |
| C. | 150 |
| D. | 200 |
| Answer» B. 100 | |
| 8. |
In actual machines, mechanical advantage is |
| A. | equal to |
| B. | less than |
| C. | greater than |
| Answer» B. less than | |
| 9. |
The angle of inclination of the plane at which the body begins to move down the plane, is called |
| A. | angle of friction |
| B. | angle of repose |
| C. | angle of projection |
| D. | none of these |
| Answer» A. angle of friction | |
| 10. |
The minimum force required to slide a body of weight W on a rough horizontal plane is |
| A. | W sin ? |
| B. | W cos ? |
| C. | W tan ? |
| D. | none of these |
| Answer» C. W tan ? | |
| 11. |
The range of projectile on a downward inclined plane is |
| A. | less than |
| B. | more than |
| C. | equal to |
| Answer» B. more than | |
| 12. |
The forces, whose lines of action are parallel to each other and act in the same directions, are known as |
| A. | coplaner concurrent forces |
| B. | coplaner non-concurrent forces |
| C. | like parallel forces |
| D. | unlike parallel forces |
| Answer» C. like parallel forces | |
| 13. |
The distance, between the point of projection and the point where the projectile strikes the ground, is known as range. |
| A. | Correct |
| B. | Incorrect |
| Answer» A. Correct | |
| 14. |
If tension in the cable supporting a lift moving downwards is half the tension when it is moving upwards, the acceleration of the lift is |
| A. | g / 2 |
| B. | g / 3 |
| C. | g / 4 |
| D. | none of these |
| Answer» D. none of these | |
| 15. |
The impact between two lead spheres is approximately equal to an |
| A. | elastic |
| B. | inelastic |
| Answer» B. inelastic | |
| 16. |
The angle of the inclined plane at which a body just begins to slide down the plane, is called helix angle. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 17. |
The total energy possessed by a system of moving bodies |
| A. | is constant at every instant |
| B. | varies from point to point |
| C. | is maximum in the start and minimum at the end |
| D. | is minimum in the start and maximum at the end |
| Answer» A. is constant at every instant | |
| 18. |
Moment of inertia of a circular section about an axis perpendicular to the section is |
| A. | ?d3 / 16 |
| B. | ?d3 / 32 |
| C. | ?d4 / 32 |
| D. | ?d4 / 64 |
| Answer» C. ?d4 / 32 | |
| 19. |
A couple produces |
| A. | translatory motion |
| B. | rotational motion |
| C. | combined translatory and rotational motion |
| D. | none of the above |
| Answer» B. rotational motion | |
| 20. |
A non-reversible machine is also called a self-locking machine |
| A. | Agree |
| B. | Disagree |
| Answer» A. Agree | |
| 21. |
A body will begin to move down an inclined plane if the angle of inclination of the plane is |
| A. | equal to |
| B. | less than |
| C. | greater than |
| Answer» C. greater than | |
| 22. |
Which of the following statement is wrong? |
| A. | A force acting in the opposite direction to the motion of the body is called force of friction. |
| B. | The ratio of the limiting friction to the normal reaction is called coefficient of friction. |
| C. | A machine whose efficiency is 100% is known as an ideal machine. |
| D. | The velocity ratio of a machine is the ratio of load lifted to the effort applied. |
| Answer» D. The velocity ratio of a machine is the ratio of load lifted to the effort applied. | |
| 23. |
When a rigid body is suspended vertically, and it oscillates with a small amplitude under the action of the force of gravity, the body is known as |
| A. | simple pendulum |
| B. | compound pendulum |
| C. | torsional pendulum |
| D. | second's pendulum |
| Answer» B. compound pendulum | |
| 24. |
A smooth cylinder lying on its convex surface remains in |
| A. | stable |
| B. | unstable |
| C. | neutral |
| Answer» B. unstable | |
| 25. |
A machine having an efficiency less than 50%, is known as |
| A. | reversible machine |
| B. | non-reversible machine |
| C. | neither reversible nor non-reversible machine |
| D. | ideal machine |
| Answer» B. non-reversible machine | |
| 26. |
A framed structure is perfect, if the number of members are |
| A. | equal to |
| B. | less than |
| C. | greater than |
| D. | either (b) or (c) |
| Answer» A. equal to | |
| 27. |
A ladder is resting on a rough ground and leaning against a smooth vertical wall. The force of friction will act |
| A. | downward at its upper end |
| B. | upward at its upper end |
| C. | zero at its upper end |
| D. | perpendicular to the wall at its upper end |
| Answer» C. zero at its upper end | |
| 28. |
All the steel trusses of the bridges, have one of their end roller supported, and other end hinged. The main advantage of such a support is that the truss remains stable. |
| A. | True |
| B. | False |
| Answer» A. True | |
| 29. |
The force required to move the body up the plane will be minimum if it makes an angle with the inclined plane |
| A. | equal to |
| B. | less than |
| C. | greater than |
| Answer» A. equal to | |
| 30. |
One watt is equal to |
| A. | 0.1 joule / s |
| B. | 1 joule / s |
| C. | 10 joules / s |
| D. | 100 joules / s |
| Answer» B. 1 joule / s | |
| 31. |
Vectors method for the resultant force is also called polygon law of forces. |
| A. | Correct |
| B. | Incorrect |
| Answer» A. Correct | |
| 32. |
The acceleration of a particle moving with simple harmonic motion, at any instant is given by |
| A. | ?.y |
| B. | ?2.y |
| C. | ?2/y |
| D. | ?3.y |
| Answer» B. ?2.y | |
| 33. |
The power developed by a body acted upon by a torque T newton metre (N - m) and revolving at ? radian / s is given by |
| A. | T.? (in watts) |
| B. | T.? / 60 (in watts) |
| C. | T.? / 75 (in kilowatts) |
| D. | T.? / 4500 (in kilowatts) |
| Answer» A. T.? (in watts) | |
| 34. |
The centre of gravity of a hemisphere lies at a distance of 3r / 8 from its base measured along the vertical radius. |
| A. | Right |
| B. | Wrong |
| Answer» A. Right | |
| 35. |
The friction experienced by a body, when at rest, is known as |
| A. | static friction |
| B. | dynamic friction |
| C. | limiting friction |
| D. | coefficient of friction |
| Answer» A. static friction | |
| 36. |
The centre of percussion is below the centre of gravity of the body and is at a distance equal to |
| A. | h / kG |
| B. | h2 / kG |
| C. | k2G / h |
| D. | h x kG |
| Answer» C. k2G / h | |
| 37. |
A smooth cylinder lying on a |
| A. | curved surface |
| B. | convex surface |
| C. | horizontal surface |
| Answer» C. horizontal surface | |
| 38. |
The unit of moment of inertia of an area is |
| A. | kg-m2 |
| B. | kg-m-s2 |
| C. | kg/m2 |
| D. | m4 |
| Answer» D. m4 | |
| 39. |
A machine which is capable of doing work in the reversed direction, after the effort is re-moved, is called a non-reversible machine. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 40. |
The force applied on a body of mass 100 kg to produce an acceleration of 5 m/s2, is |
| A. | 20N |
| B. | 100N |
| C. | 500N |
| D. | none of these |
| Answer» C. 500N | |
| 41. |
A machine which is capable of doing any work in the reversed direction, after the effort is removed, is called a reversible machine. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 42. |
The velocity ratio of a simple wheel and axle with D and d as the diameters of effort wheel and load axle, is |
| A. | D + d |
| B. | D - d |
| C. | D x d |
| D. | D / d |
| Answer» D. D / d | |
| 43. |
The centre of oscillation and centre of suspension for a compound pendulum are interchangeable. |
| A. | True |
| B. | False |
| Answer» A. True | |
| 44. |
The term 'force' may be defined as an agent which produces or tends to produce, destroys or tends to destroy motion |
| A. | Agree |
| B. | Disagree |
| Answer» A. Agree | |
| 45. |
The acceleration of a particle moving with simple harmonic motion is proportional to the displacement of the particle from the mean position. |
| A. | True |
| B. | False |
| Answer» A. True | |
| 46. |
When a particle moves along a circular path, its acceleration has two components, one is normal component and the other is tangential component of acceleration |
| A. | True |
| B. | False |
| Answer» A. True | |
| 47. |
If the resultant of two equal forces has the same magnitude as either of the forces, then angle between the two forces is |
| A. | 30? |
| B. | 60? |
| C. | 90? |
| D. | 120? |
| Answer» D. 120? | |
| 48. |
The motion of a particle round a fixed axis is |
| A. | translatory |
| B. | rotary |
| C. | circular |
| D. | translatory as well as rotatry |
| Answer» C. circular | |
| 49. |
According to Newton's first law of motion, |
| A. | every body continues in its state of rest or of uniform motion, in a straight line, unless it is acted upon by some external force |
| B. | 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 |
| C. | to every action, there is always an equal and opposite reaction |
| D. | none of the above |
| Answer» A. every body continues in its state of rest or of uniform motion, in a straight line, unless it is acted upon by some external force | |
| 50. |
Two equal and opposite parallel forces whose lines of action are different, can be replaced by a single force parallel to the given forces |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
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