MCQOPTIONS
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MCQOPTIONS
This section includes 83 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Mechanics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
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» B. Disagree | |
| 2. |
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» C. | |
| 3. |
During elastic impact, the relative velocity of the two bodies after impact is |
| A. | equal to |
| B. | equal and opposite to |
| C. | less than |
| D. | greater than |
| Answer» C. less than | |
| 4. |
The angle of inclination of a vehicle when moving along a circular path |
| A. | depends |
| B. | does not depend |
| Answer» C. | |
| 5. |
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» D. a4 / 16 | |
| 6. |
In railways, the super-elevation is expressed in terms of the difference of level between the two rails. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 7. |
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» B. the point of suspension | |
| 8. |
The linear velocity of a body rotating at ? rad / s along a circular path of radius r is given by |
| A. | ? / r |
| B. | ?.r |
| C. | ?2/r |
| D. | ?2.r |
| Answer» C. ?2/r | |
| 9. |
In a wormed geared pully block, if the number of teeth one the worm wheel is doubled, then its velocity ratio is also doubled. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
A framed structure is imperfect, if the number of members are |
| A. | equal to |
| B. | less than |
| C. | greater than |
| D. | either (b) or (c) |
| Answer» E. | |
| 11. |
The moment of inertia of a square of side a about its base is a4 / 3 |
| A. | True |
| B. | False |
| Answer» B. False | |
| 12. |
The forces which meet at one point, but their lines of action |
| A. | lie |
| B. | do not lie |
| Answer» C. | |
| 13. |
The potential energy of a vertically raised body is |
| A. | equal to |
| B. | less than |
| C. | greater than |
| Answer» B. less than | |
| 14. |
The unit of mass moment of intertia in S.I. units is kg - m2 |
| A. | True |
| B. | False |
| Answer» B. False | |
| 15. |
In a screw jcak, the effort required to lower the load is |
| A. | less than |
| B. | equal to |
| C. | more than |
| Answer» B. equal to | |
| 16. |
Newton's second law motion |
| A. | gives |
| B. | does not give |
| Answer» B. does not give | |
| 17. |
The amplitude is always |
| A. | equal to |
| B. | less than |
| C. | greater than |
| Answer» B. less than | |
| 18. |
The resultant of two equal forces P making an angle ?, is given by |
| A. | 2 P sin ?/2 |
| B. | 2 P cos ? / 2 |
| C. | 2 P tan ?/2 |
| D. | 2 P cot ?/2 |
| Answer» C. 2 P tan ?/2 | |
| 19. |
Mass moment of inertia of a thin rod about its one end is |
| A. | same as |
| B. | twice |
| C. | thrice |
| D. | four times |
| Answer» E. | |
| 20. |
Coplaner non-concurrent forces are those forces which |
| A. | meet |
| B. | do not meet |
| Answer» C. | |
| 21. |
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» B. less than | |
| 22. |
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» B. Wrong | |
| 23. |
The terms 'leverage' and 'mechanical advantage' of a compound lever have got the same meaning. |
| A. | Right |
| B. | Wrong |
| Answer» B. Wrong | |
| 24. |
In ideal machines, mechanical advantage is |
| A. | equal to |
| B. | less than |
| C. | greater than |
| Answer» B. less than | |
| 25. |
A lead ball with a certain velocity is made to strike a wall, it falls down, but rubber ball of same mass and with same velocity strikes the same wall, it rebounds. Select the correct reason from the following |
| A. | both the balls undergo an equal change in momentum |
| B. | the change in momentum suffered by rubber ball is more than the lead balf |
| C. | the change in momentum suffered by rubber ball is less than the lead ball |
| D. | none of the above |
| Answer» C. the change in momentum suffered by rubber ball is less than the lead ball | |
| 26. |
The forces, which do not meet at one point, but their lines of action lie on the same plane, are known as coplaner concurrent forces |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 27. |
The triangle law of forces states that if two forces acting simultaneously on a particle, be represented in magnitude and direction by the two sides of a triangle taken in order, then their resultant may be represented in mangnitude and direction by the third side of of a triangle, taken in opposite order. |
| A. | TRUE |
| B. | FALSE |
| Answer» B. FALSE | |
| 28. |
A redundant frame is also called |
| A. | perfect |
| B. | imperfect |
| C. | deficient |
| Answer» C. deficient | |
| 29. |
The angle of inclination with the vertical is |
| A. | more |
| B. | less |
| Answer» B. less | |
| 30. |
The centre of gravity of an equilateral triangle with each side a, is |
| A. | ?3 a/2 |
| B. | 2?3 a |
| C. | a/2 ?3 |
| D. | 3?2 a |
| Answer» D. 3?2 a | |
| 31. |
Which of the fololowing statement is correct in connection with projectiles? |
| A. | A path, traced by a projectile in the space, is known as trajectory. |
| B. | The velocity with which a projectile is projected, is known as the velocity of projection. |
| C. | The angle, with the horizontal, at which a projectile is projected is known as angle of projection. |
| D. | all of the above |
| Answer» E. | |
| 32. |
If a number of forces acting at a point be represented in magnidude and direction by the three sides of a triangle, taken in order, then the forces are not in equilibrium |
| A. | Agree |
| B. | Disagree |
| Answer» C. | |
| 33. |
In a screw jack, the effort required to lift the load is given by. Where W = Load lifted, ? = Helix angle, and ? = Angle of friction |
| A. | P = W tan (? ? ?) |
| B. | P = W tan (? + ?) |
| C. | P = W tan (? - ?) |
| D. | P = W tan (? + ?) |
| Answer» C. P = W tan (? - ?) | |
| 34. |
The process of finding out the resultant force is called |
| A. | composition |
| B. | resolution |
| Answer» B. resolution | |
| 35. |
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» B. less than | |
| 36. |
The force which acts along the radius of a circle and directed away from the centre of the circle is called centrifugal force |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 37. |
If the number of pulleys in a system is equal to its velocity ratio, then it is a |
| A. | first |
| B. | second |
| C. | third |
| Answer» C. third | |
| 38. |
The centre of gravity of a right circular solid cone is at a distance of |
| A. | h / 2 |
| B. | h / 3 |
| C. | h / 4 |
| D. | h / 6 |
| Answer» D. h / 6 | |
| 39. |
If two bodies having masses m1 and m2 (m1 > m2) have equal kinetic energies, the momentum of body having mass m1 is |
| A. | equal to |
| B. | less than |
| C. | greater than |
| Answer» D. | |
| 40. |
A newton is defined as the force while acting upon a mass of one kg, produces an acceleration of 1 m/s2 in the direction of which it acts. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 41. |
The periodic time of a particle with simple harmonic motion is |
| A. | directly |
| B. | inversely |
| Answer» C. | |
| 42. |
The unit of force in S.I. system of units of |
| A. | dyne |
| B. | kilogram |
| C. | newton |
| D. | watt |
| Answer» D. watt | |
| 43. |
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» D. 60? + ?/2 | |
| 44. |
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» D. 2n - 1 | |
| 45. |
The kinetic energy of a body |
| A. | does not depend |
| B. | depends |
| Answer» C. | |
| 46. |
The coefficient of restitution for elastic bodies is one |
| A. | Right |
| B. | Wrong |
| Answer» C. | |
| 47. |
The centre of gravity of a semi-circle lies at a distance of |
| A. | 3r/8 |
| B. | 4r/3? |
| C. | 8r / 3 |
| D. | 3r / 4? |
| Answer» C. 8r / 3 | |
| 48. |
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» C. tan ? = ?V x ?H | |
| 49. |
The potential energy stord by a spring in compression, is called strain energy. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 50. |
The velocity of a particle moving with simple harmonic motion is |
| A. | zero |
| B. | minimum |
| C. | maximum |
| Answer» D. | |