Discussion
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- Question
The air pressure at the fuel bed is reduced below that of atmosphere by means of a fan placed at or near the bottom of the chimney to produce a draught. Such a draught is called
Options- A. natural draught
- B. induced draught
- C. forced draught
- D. balanced draught
- Correct Answer
- induced draught
- 1. Which of the following is not a boiler mounting?
Options- A. Blow off cock
- B. Feed check valve
- C. Economiser
- D. Fusible plug Discuss
- 2. The cylinder condensation or missing quantity may be reduced by
Options- A. the efficient steam jacketing of the cylinder walls
- B. superheating the steam supplied to the engine cylinder
- C. keeping the expansion ratio small in each cylinder
- D. all of the above Discuss
- 3. In a receiver type compound engine, the high pressure and low pressure cylinders
Options- A. have common piston rod
- B. are set at 90°
- C. have separate piston rods
- D. are set in V - arrangement Discuss
- 4. The actual vacuum in a condenser is equal to
Options- A. barometric pressure + actual pressure
- B. barometric pressure - actual pressure
- C. gauge pressure + atmospheric pressure
- D. gauge pressure - atmospheric pressure Discuss
- 5. The damper in a steam boiler is provided to control the draught (i.e. rate of flow of air) and thus regulate the rate of generation of steam.
Options- A. Correct
- B. Incorrect Discuss
- 6. The selection of type and size of a steam boiler depends upon
Options- A. the power required and working pressure
- B. the geographical position of the power house
- C. the fuel and water available
- D. all of the above Discuss
- 7. The mechanical draught __________ with the amount of smoke.
Options- A. increases
- B. decreases
- C. does not effect Discuss
- 8. The artificial draught is produced by
Options- A. steam jet
- B. centrifugal fan
- C. chimney
- D. both (a) and (b) Discuss
- 9. The ratio of the volume at cut-off to the swept volume is called
Options- A. cut-off ratio
- B. expansion ratio
- C. clearance ratio
- D. none of these Discuss
- 10. When the total heat of steam is h kJ/kg and the sensible heat of feed water is hf1 kJ/kg, then the factor of evaporation is given by
Options- A.
- B.
- C.
- D. none of these Discuss
Steam Boilers and Engines problems
Search Results
Correct Answer: Economiser
Correct Answer: all of the above
Correct Answer: have separate piston rods
Correct Answer: barometric pressure - actual pressure
Correct Answer: Correct
Correct Answer: all of the above
Correct Answer: decreases
Correct Answer: both (a) and (b)
Correct Answer: cut-off ratio
Correct Answer:
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