Discussion
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- Question
The blade velocity coefficient is ratio of relative velocity of steam at outlet tip of the blade to the relative velocity of steam at inlet tip of the blade.
Options- A. True
- B. False
- Correct Answer
- True
- 1. The shrinkage allowance for cast iron pattern is
Options- A. 10 mm/m
- B. 16 mm/m
- C. 20 mm/m
- D. 26 mm/m Discuss
- 2. The __________ point of ammonia is -77.7°C.
Options- A. freezing
- B. boiling Discuss
- 3. The power transmitted through the nozzle is maximum when the head lost due to friction in the pipe is __________ of the total supply head.
Options- A. one-half
- B. one-third
- C. two-third Discuss
- 4. The actual volume of air delivered by a compressor, When reduced to the normal temperature and pressure conditions is called compressor capacity.
Options- A. Yes
- B. No Discuss
- 5. In ideal machines, mechanical advantage is __________ velocity ratio.
Options- A. equal to
- B. less than
- C. greater than Discuss
- 6. Sulphur in cast iron
Options- A. makes the iron soft and easily machinable
- B. increases hardness and brittleness
- C. makes the iron white and hard
- D. aids fusibility and fluidity Discuss
- 7. The state of a substance whose evaporation from its liquid state is partial, is known as steam.
Options- A. Agree
- B. Disagree Discuss
- 8. The coefficient of performance of a domestic refrigerator is __________ as compared to a domestic air-conditioner.
Options- A. same
- B. less
- C. more Discuss
- 9. In the casing of a centrifugal pump, the kinetic energy of the water is converted into pressure energy before the water leaves the casing.
Options- A. True
- B. False Discuss
- 10. The speed of a turbine runner is
Options- A. directly proportional to H1/2
- B. inversely proportional to H1/2
- C. directly proportional to H3/2
- D. inversely proportional to H3/2 Discuss
More questions
Correct Answer: 10 mm/m
Correct Answer: freezing
Correct Answer: one-third
Correct Answer: No
Correct Answer: equal to
Correct Answer: increases hardness and brittleness
Correct Answer: Disagree
Correct Answer: less
Correct Answer: True
Correct Answer: directly proportional to H1/2
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