Discussion
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- Question
The relative efficiency is defined as the
Options- A. ratio of thermal efficiency to Rankine efficiency
- B. ratio of brake power to the indicated power
- C. ratio of heat equivalent to indicated power to the energy supplied in steam
- D. product of thermal efficiency and Rankine efficiency
- Correct Answer
- ratio of thermal efficiency to Rankine efficiency
- 1. By compounding the expansion of steam in two or more cylinders, the length of stroke
Options- A. does not change
- B. increases
- C. decreases Discuss
- 2. Cut-off governing as compared to throttle governing is
Options- A. less efficient and less economical
- B. less efficient and more economical
- C. more efficient and less economical
- D. more efficient and more economical Discuss
- 3. The number of fire tubes in a Cochran boiler are
Options- A. 75
- B. 115
- C. 165
- D. 225 Discuss
- 4. In a fire tube boiler, the water is contained inside the tubes which are surrounded by flames and hot gases from outside.
Options- A. True
- B. False Discuss
- 5. A compound steam engine requires a heavier flywheel than simple steam engines.
Options- A. True
- B. False Discuss
- 6. The internal flue tubes of a Lancashire boiler are reduced in diameter at the back to provide access to the lower part of the boiler.
Options- A. True
- B. False Discuss
- 7. The missing quantity per stroke is equal to
Options- A. cylinder feed - indicated mass of steam
- B. cylinder feed + indicated mass of steam
- C. mass of cushion steam + indicated mass of steam
- D. mass of cushion steam + cylinder feed Discuss
- 8. Water tube boilers produce steam at a __________ pressure than that of fire tube boilers.
Options- A. lower
- B. higher Discuss
- 9. Locomotive boiler is a __________ boiler.
Options- A. fire tube
- B. water tube Discuss
- 10. The performance of a boiler is measured by the
Options- A. amount of water evaporated per hour
- B. steam produced in kg/h
- C. steam produced in kg/kg of fuel burnt
- D. all of these Discuss
Steam Boilers and Engines problems
Search Results
Correct Answer: decreases
Correct Answer: more efficient and more economical
Correct Answer: 165
Correct Answer: False
Correct Answer: False
Correct Answer: True
Correct Answer: cylinder feed - indicated mass of steam
Correct Answer: higher
Correct Answer: fire tube
Correct Answer: all of these
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