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- Question
A machine having an efficiency greater than 50%, is known as
Options- A. reversible machine
- B. non-reversible machine
- C. neither reversible nor non-reversible machine
- D. ideal machine
- Correct Answer
- reversible machine
- 1. The amount by which the outer edge of the rail is raised, is known as super-elevation.
Options- A. Agree
- B. Disagree Discuss
- 2. The angle which the normal reaction makes with the resultant reaction is called angle of friction.
Options- A. Agree
- B. Disagree Discuss
- 3. In order to completely specify angular displacement by a vector, it must fix
Options- A. direction of the axis of rotation
- B. magnitude of angular displacement
- C. sense of angular displacement
- D. all of these Discuss
- 4. If a body is acted upon by a number of coplaner non-concurrent forces, it may
Options- A. rotate about itself without moving
- B. move in any one direction rotating about itself
- C. be completely at rest
- D. all of these Discuss
- 5. The unit of energy in S.I. units is
Options- A. dyne
- B. watt
- C. kg-m
- D. joule Discuss
- 6. The angle of inclination of the plane at which the body begins to move down the plane, is called
Options- A. angle of friction
- B. angle of repose
- C. angle of projection
- D. none of these Discuss
- 7. Which of the following statement is correct in connection with projectiles?
Options- 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 Discuss
- 8. When a body falls freely under gravitational force, it possesses __________ weight.
Options- A. no
- B. minimum
- C. maximum Discuss
- 9. Two forces are acting at an angle of 120°. The bigger force is 40N and the resultant is perpendicular to the smaller one. The smaller force is
Options- A. 20 N
- B. 40 N
- C. 80 N
- D. none of these Discuss
- 10. When the lift is moving upwards with some acceleration, the pressure exerted by a man is __________ proportional to its acceleration.
Options- A. directly
- B. inversely Discuss
Engineering Mechanics problems
Search Results
Correct Answer: Agree
Correct Answer: Agree
Correct Answer: all of these
Correct Answer: all of these
Correct Answer: joule
Correct Answer: angle of friction
Correct Answer: all of the above
Correct Answer: no
Correct Answer: 20 N
Correct Answer: directly
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