Steam Boilers and Engines problems
- 1. The heat balance sheet for the boiler shows the
Options- A. complete account of heat supplied by 1 kg of dry fuel and the heat consumed
- B. moisture present in the fuel
- C. steam formed by combustion of hygrogen per kg of fuel
- D. all of the above Discuss
Correct Answer: complete account of heat supplied by 1 kg of dry fuel and the heat consumed
- 2. Which of the following is a water tube boiler?
Options- A. Lancashire boiler
- B. Babcock and Wilcox boiler
- C. Locomotive boiler
- D. Cochran boiler Discuss
Correct Answer: Babcock and Wilcox boiler
- 3. The diameter of a cylindrical shell of a Scotch marine boiler varies from
Options- A. 1.5 to 2 m
- B. 2.5 to 3.5 m
- C. 3.5 to 4.5 m
- D. none of these Discuss
Correct Answer: 2.5 to 3.5 m
- 4. The diagram factor is the ratio of the
Options- A. area of the actual indicator diagram to the area of theoretical indicator diagram
- B. actual workdone per stroke to the theoretical workdone per stroke
- C. actual mean effective pressure to the theoretical mean effective pressure
- D. any one of the above Discuss
Correct Answer: any one of the above
- 5. The fire tubes in a Cochran boiler usually have __________ diameter.
Options- A. 6.25 mm
- B. 62.5 mm
- C. 72.5 mm
- D. 92.5 mm Discuss
Correct Answer: 62.5 mm
- 6. In case of non-condensing steam engines, the pressure of steam in the cylinder during exhaust stroke is __________ the condenser pressure.
Options- A. equal to
- B. lower than
- C. higher than Discuss
Correct Answer: higher than
- 7. A compound steam engine in which piston rods of high pressure and low pressure cylinders ' are attached to two different cranks set at 180° to each other, is called
Options- A. receiver type compound engine
- B. Tandem type compound engine
- C. Woolf type compound engine
- D. both (a) and (b) Discuss
Correct Answer: Woolf type compound engine
- 8. The actual power supplied by the engine crankshaft is called
Options- A. indicated power
- B. brake power
- C. frictional power
- D. none of these Discuss
Correct Answer: brake power
- 9. The draught produced by a steam jet issuing from a nozzle placed in the chimney is called
Options- A. induced steam jet draught
- B. chimney draught
- C. forced steam jet draught
- D. none of these Discuss
Correct Answer: induced steam jet draught
- 10. The equivalent evaporation is defined as
Options- A. the ratio of heat actually used in producing the steam to the heat liberated in the furnace
- B. the amount of water evaporated or steam produced in kg per kg of fuel burnt
- C. the amount of water evaporated from and at 100° C into dry and saturated steam
- D. the evaporation of 15.653 kg of water per hour from and at 100° C Discuss
Correct Answer: the amount of water evaporated from and at 100° C into dry and saturated steam
More in Mechanical Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.