Steam Boilers and Engines problems
- 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
Correct Answer: Economiser
- 2. 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 Discuss
Correct Answer: induced draught
- 3. 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
Correct Answer: all of the above
- 4. The mechanical draught __________ with the amount of smoke.
Options- A. increases
- B. decreases
- C. does not effect Discuss
Correct Answer: decreases
- 5. The artificial draught is produced by
Options- A. steam jet
- B. centrifugal fan
- C. chimney
- D. both (a) and (b) Discuss
Correct Answer: both (a) and (b)
- 6. 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
Correct Answer: cut-off ratio
- 7. 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
Correct Answer:
- 8. Which of the following is required for a steam condensing plant?
Options- A. Condenser
- B. Condensate pump
- C. Air extraction pump
- D. all of these Discuss
Correct Answer: all of these
- 9. Blow off cock in a boiler is used to
Options- A. control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required
- B. empty the boiler when required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler
- C. put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit
- D. increase the temperature of saturated steam without raising its pressure Discuss
Correct Answer: empty the boiler when required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler
- 10. Lancashire boiler is a stationary fire tube boiler.
Options- A. Agree
- B. Disagree Discuss
Correct Answer: Agree
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