Discussion
Home ‣ Mechanical Engineering ‣ Steam Boilers and Engines Comments
- Question
The number of fire tubes in a Cochran boiler are
Options- A. 75
- B. 115
- C. 165
- D. 225
- Correct Answer
- 165
- 1. 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
- 2. A compound steam engine requires a heavier flywheel than simple steam engines.
Options- A. True
- B. False Discuss
- 3. A compound steam engine in which the high pressure and low pressure cylinders have common piston rod, is called
Options- A. receiver type compound engine
- B. Tandem type compound engine
- C. Woolf type compound engine
- D. none of these Discuss
- 4. Lancashire boiler has __________ internal flue tubes.
Options- A. one
- B. two
- C. three
- D. four Discuss
- 5. Cut-off ratio is the ratio of
Options- A. swept volume to the volume at cut-off
- B. volume at cut-off to the clearance volume
- C. volume at cut-off to the swept volume
- D. clearance volume to the volume at cut-off Discuss
- 6. 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
- 7. 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
- 8. 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 Discuss
- 9. 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
- 10. 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
Steam Boilers and Engines problems
Search Results
Correct Answer: False
Correct Answer: False
Correct Answer: Tandem type compound engine
Correct Answer: two
Correct Answer: volume at cut-off to the swept volume
Correct Answer: more efficient and more economical
Correct Answer: decreases
Correct Answer: ratio of thermal efficiency to Rankine efficiency
Correct Answer: True
Correct Answer: cylinder feed - indicated mass of steam
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