Discussion
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- Question
A device in which some portion of waste heat of flue gases is recovered to heat the air before it passes to the furnace for combustion purpose, is knwon as
Options- A. superheater
- B. air preheater
- C. economiser
- D. injector
- Correct Answer
- air preheater
- 1. Lancashire boiler is
Options- A. stationary fire tube boiler
- B. internally fired boiler
- C. horizontal boiler
- D. all of these Discuss
- 2. The governing of steam engines keep the engine speed constant according to the changing load conditions
Options- A. Yes
- B. No Discuss
- 3. A turbine develops 10000 kW under a head of 25 metres at 135 r.p.m. Its specific speed is
Options- A. 175.4 r.p.m.
- B. 215.5 r.p.m.
- C. 241.5 r.p.m.
- D. 275.4 r.p.m Discuss
- 4. A Kaplan turbine is preferred for a specific speed of 300 to 1000 r.p.m.
Options- A. Yes
- B. No Discuss
- 5. The specific speed of a turbine is the speed of an imaginary turbine, identical with the given turbine, which
Options- A. delivers unit discharge under unit head
- B. delivers unit discharge under unit speed
- C. develops unit power under unit head
- D. develops unit power under unit speed Discuss
- 6. The efficiency of the plant __________ with the mechanical draught.
Options- A. increases
- B. decreases
- C. remains constant Discuss
- 7. The evaporative capacity of a boiler is defined as the evaporation of 15.653 kg of water per hour from and at 100° C.
Options- A. Yes
- B. No Discuss
- 8. The chimney draught varies with
Options- A. climatic conditions
- B. temperature of furnace gases
- C. height of chimney
- D. all of these Discuss
- 9. The ratio of the __________ to the volume at cut-off is called expansion ratio.
Options- A. swept volume
- B. clearance volume Discuss
- 10. In water tube boilers, the water passes through the tubes which are surrounded by flames and hot gases.
Options- A. Yes
- B. No Discuss
Steam Boilers and Engines problems
Search Results
Correct Answer: all of these
Correct Answer: Yes
Correct Answer: 241.5 r.p.m.
Correct Answer: Yes
Correct Answer: develops unit power under unit head
Correct Answer: increases
Correct Answer: No
Correct Answer: all of these
Correct Answer: swept volume
Correct Answer: Yes
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