Discussion
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- Question
Efficiency of a screw jack is given by(where ? = Helix angle, and ? = Angle of friction.)
Options- A.
- B.
- C.
- D.
- Correct Answer
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- 1. The velocity ratio for the second system of pulleys is n.
Options- A. True
- B. False Discuss
- 2. The force, by which the body is attracted, towards the centre of the earth, is called
Options- A. impulsive force
- B. mass
- C. weight
- D. momentum Discuss
- 3. The range of projectile will be maximum for a given velocity of projectile, when the angle of projection (?) is
Options- A. ?/2
- B. 30° + ?/2
- C. 45° + ?/2
- D. 60° + ?/2 Discuss
- 4. When a train is rounding a curve, the side thrust on the wheel flanges is prevented by raising the outer edge of the rail.
Options- A. Yes
- B. No Discuss
- 5. One joule means that
Options- A. work is done by a force of 1 N when it displaces a body through 1m
- B. work is done by a force of 1 kg when it displaces a body through 1 m
- C. work is done by a force of 1 dyne when it displaces a body through 1 cm
- D. work is done by a force of 1 g when it displaces a body through 1 cm Discuss
- 6. The velocity ratio of a first system of pulleys with 4 pulleys is
Options- A. 4
- B. 8
- C. 16
- D. 20 Discuss
- 7. According to parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through centre of gravity (i.e. IP) is given by(where, A = Area of the section, IG = Moment of inertia of the section about an axis passing through its C.G., and h = Distance between C.G. and the parallel axis.)
Options- A. IP = IG + Ah2
- B. IP = IG - Ah2
- C. IP = IG / Ah2
- D. IP = Ah2 / IG Discuss
- 8. The moment of inertia of a thin spherical shell of mass m and radius r, about its diameter is
Options- A. mr2/3
- B. 2mr2/3
- C. 2mr2/5
- D. 3mr2/5 Discuss
- 9. The linear velocity of a body rotating at ? rad / s along a circular path of radius r is given by
Options- A. ?/r
- B. ?.r
- C. ?2/r
- D. ?2.r Discuss
- 10. The ideal angle of banking provided on the curves on roads depends upon
Options- A. weight of the vehicle
- B. (velocity)2 of the vehicle
- C. nature of the road surface
- D. coefficient of friction between the road and vehicle contact point Discuss
Engineering Mechanics problems
Search Results
Correct Answer: True
Correct Answer: weight
Correct Answer: 45° + ?/2
Correct Answer: Yes
Correct Answer: work is done by a force of 1 N when it displaces a body through 1m
Correct Answer: 16
Correct Answer: IP = IG + Ah2
Correct Answer: 2mr2/3
Correct Answer: ?.r
Correct Answer: (velocity)2 of the vehicle
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