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- Question
The polygon law of forces states that if a number of forces, acting simultaneously on a particle, be represented in magnitude and direction by the sides a polygon taken in order, then their resultant is represented in magnitude and direction by the closing side of the polygon, taken in opposite direction.
Options- A. Correct
- B. Incorrect
- Correct Answer
- Correct
- 1. 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
- 2. 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
- 3. In a simply supported beam carrying a uniformly distributed load w per unit length, the point of contraflexure
Options- A. lies in the centre of the beam
- B. lies at the ends of the beam
- C. depends upon the length of beam
- D. does not exist Discuss
- 4. Any number of equal divisions can be obtained on milling machine by
Options- A. direct indexing
- B. simple indexing
- C. compound indexing
- D. differential indexing Discuss
- 5. The process of heat transfer from one particle of the body to another is called conduction, when the particles of the body
Options- A. move actually
- B. do not move actually
- C. affect the intervening medium
- D. does not affect the intervening medium Discuss
- 6. In flame hardening, oxy-acetylene flame is used.
Options- A. Yes
- B. No Discuss
- 7. The coefficient of performance (C.O.P.) of a refrigerator working as a heat pump is given by
Options- A. (C.O.P.)P = (C.O.P.)R + 2
- B. (C.O.P.)P = (C.O.P.)R + 1
- C. (C.O.P)P = (C.O.P)R - 1
- D. (C.O.P)P = (C.O.P)R Discuss
- 8. The ratio of Nusselt number and the product of Reynold's number and Prandtl number is equal to
Options- A. Stanton number
- B. Biot number
- C. Peclet number
- D. Grashoff number Discuss
- 9. Falling drops of water become spheres due to the property of
Options- A. surface tension of water
- B. compressibility of water
- C. capillarity of water
- D. viscosity of water Discuss
- 10. Light weight substances can not be effective moderators.
Options- A. True
- B. False Discuss
More questions
Correct Answer: 2mr2/5
Correct Answer: static friction
Correct Answer: does not exist
Correct Answer: simple indexing
Correct Answer: do not move actually
Correct Answer: Yes
Correct Answer: (C.O.P.)P = (C.O.P.)R + 1
Correct Answer: Stanton number
Correct Answer: surface tension of water
Correct Answer: False
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