Engineering Mechanics problems
- 1. The moment of inertia of a square of side (a) about an axis through its centre of gravity is
Options- A. a4/4
- B. a4/8
- C. a4/12
- D. a4/36 Discuss
Correct Answer: a4/12
- 2. The ratio of static friction to dynamic friction is always
Options- A. equal to one
- B. less than one
- C. greater than one
- D. none of these Discuss
Correct Answer: greater than one
- 3. A spherical body is symmetrical about its perpendicular axis. According to Routh's rule, the moment of inertia of a body about an axis passing through its centre of gravity is(where, M = Mass of the body, and S = Sum of the squares of the two semi-axes.)
Options- A. MS/3
- B. MS/4
- C. MS/5
- D. none of these Discuss
Correct Answer: MS/5
- 4. A ladder is resting on a smooth ground and leaning against a rough vertical wall. The force of friction will act
Options- A. towards the wall at its upper and
- B. away from the wall at its upper end
- C. downward at its upper end
- D. upward at its upper end Discuss
Correct Answer: upward at its upper end
- 5. The motion of a wheel of a car is
Options- A. purely translation
- B. purely rotational
- C. combined translation and rotational
- D. none of these Discuss
Correct Answer: combined translation and rotational
- 6. The slope on the road surface generally provided on the curves is known as
Options- A. angle of friction
- B. angle of repose
- C. angle of banking
- D. none of these Discuss
Correct Answer: angle of banking
- 7. A body is said to move or vibrate with simple harmonic motion if its acceleration is directed towards the mean position.
Options- A. True
- B. False Discuss
Correct Answer: True
- 8. The moment of inertia of a thin rod of mass m and length l,about an axis through its centre of gravity and perpendicular to its length is
Options- A. ml2/4
- B. ml2/ 6
- C. ml2/8
- D. ml2/12 Discuss
Correct Answer: ml2/12
- 9. The cartesian equation of trajectory is(where u = Velocity of projection, ? = Angle of projection, and x, y = Co-ordinates of any point on the trajectory after t seconds.)
Options- A.
- B.
- C.
- D.
Discuss
Correct Answer:
- 10. When a body of mass moment of inertia I (about a given axis) is rotated about that axis with an angular velocity to, then the kinetic energy of rotation is
Options- A. I?
- B. I?2
- C. 0.5I?
- D. 0.5I?2 Discuss
Correct Answer: 0.5I?2
More in Mechanical Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.