Engineering Mechanics problems
- 1. If the resultant of a number of forces acting on a body is zero, then the body will not be in equilibrium.
Options- A. Yes
- B. No Discuss
Correct Answer: No
- 2. Moment of inertia is the
Options- A. second moment of force
- B. second moment of area
- C. second moment of mass
- D. all of these Discuss
Correct Answer: all of these
- 3. Moment of inertia of a hollow circular section, as shown in the below figure about an axis perpendicular to the section, is __________ than that about X-X axis.
Options- A. two times
- B. same
- C. half Discuss
Correct Answer: two times
- 4. The law of the machine is(where P = Effort applied to lift the load, m = A constant which is equal to the slope of the line, W = Load lifted, and C = Another constant which represents the machine friction.)
Options- A. P = mW - C
- B. P = m/W + C
- C. P = mW + C
- D. P = C - mW Discuss
Correct Answer: P = mW + C
- 5. The centre of gravity a T-section 100 mm x 150 mm x 50 mm from its bottom is
Options- A. 50mm
- B. 75mm
- C. 87.5mm
- D. 125mm Discuss
Correct Answer: 87.5mm
- 6. The moment of inertia of a solid sphere of mass m and radius r is
Options- A. 2mr2/3
- B. 2mr2/5
- C. mr2
- D. mr2/2 Discuss
Correct Answer: 2mr2/5
- 7. The acceleration of a body sliding down an inclined surface is
Options- A. g sin ?
- B. g cos ?
- C. g tan ?
- D. none of these Discuss
Correct Answer: g sin ?
- 8. The friction experienced by a body, when at rest, is known as
Options- A. static friction
- B. dynamic friction
- C. limiting friction
- D. coefficient of friction Discuss
Correct Answer: static friction
- 9. Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its vertex and parallel to the base, is __________ than that passing through its C.G. and parallel to the base.
Options- A. nine times
- B. six times
- C. four times
- D. two times Discuss
Correct Answer: nine times
- 10. Coplaner non-concurrent forces are those forces which __________ at one point, but their lines of action lie on the same plane.
Options- A. meet
- B. do not meel Discuss
Correct Answer: do not meel
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