Steam Boilers and Engines problems
- 1. The fire tubes in a Cochran boiler are
Options- A. horizontal
- B. vertical
- C. inclined Discuss
Correct Answer: horizontal
- 2. The function of a connecting rod is not to convert reciprocating motion of the piston into rotary motion.
Options- A. True
- B. False Discuss
Correct Answer: False
- 3. The function of a flywheel is
Options- A. to convert reciprocating motion of the piston into rotary motion.
- B. to convert rotary motion of the crankshaft into to and fro motion of the valve rod
- C. to prevent fluctuation of speed
- D. to keep the engine speed uniform at all load conditions Discuss
Correct Answer: to prevent fluctuation of speed
- 4. The diameter of flue tube in a Cornish boiler is __________ that of the shell.
Options- A. one-fourth
- B. one-third
- C. two-fifth
- D. three-fifth Discuss
Correct Answer: three-fifth
- 5. Willian's line for the steam engine is a straight line relationship between the steam consumption per hour and
Options- A. indicated power
- B. brake power
- C. efficiency
- D. pressure of steam Discuss
Correct Answer: indicated power
- 6. The pressure of steam in the engine cylinder at the beginning of the stroke is __________ the boiler pressure.
Options- A. equal to
- B. less than
- C. higher than Discuss
Correct Answer: less than
- 7. A safety valve mainly used with locomotive and marine boilers is
Options- A. lever safety valve
- B. dead weight safety valve
- C. high steam and low water safety valve
- D. spring loaded safety valve Discuss
Correct Answer: spring loaded safety valve
- 8. The power of a boiler may be 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 or steam produced in kg per kg of fuel burnt
- 9. In a uniflow engine
Options- A. steam enters and exhausts through the same port
- B. steam enters at one end and exhausts at the centre
- C. steam enters at the centre and exhausts at the other end
- D. none of the above Discuss
Correct Answer: steam enters at one end and exhausts at the centre
- 10. Cut-off governing of steam engines is a method of controlling the engine output by varying
Options- A. volume of intake steam
- B. pressure of intake steam
- C. temperature of intake steam
- D. all of these Discuss
Correct Answer: volume of intake steam
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