Steam Boilers and Engines problems
- 1. There is always some steam left in the clearance space from the previous stroke. This steam left in the clearance space is called
Options- A. wet steam
- B. saturated steam
- C. superheated steam
- D. cushion steam Discuss
Correct Answer: cushion steam
- 2. The function of an eccentric is to provide __________ motion to the slide valve.
Options- A. reciprocating
- B. rotary Discuss
Correct Answer: reciprocating
- 3. A __________ in a boiler is used to put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit.
Options- A. blow off cock
- B. fusible plug
- C. stop valve
- D. safety valve Discuss
Correct Answer: fusible plug
- 4. The clearance in the engine cylinder
Options- A. increases the mean effective pressure
- B. increases the workdone
- C. decreases the efficiency of the engine
- D. all of these Discuss
Correct Answer: all of these
- 5. The shell of the Cochran boiler is made hemispherical
Options- A. to give maximum space and strength
- B. to withstand the pressure of steam inside the boiler
- C. both (a) and (b)
- D. none of the above Discuss
Correct Answer: both (a) and (b)
- 6. The main object of a boiler trial is
Options- A. to determine the generating capacity of the boiler
- B. to determine the thermal efficiency of the boiler when working at a definite pressure
- C. to prepare heat balance sheet for the boiler
- D. all of the above Discuss
Correct Answer: all of the above
- 7. 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
Correct Answer: Correct
- 8. 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
Correct Answer: barometric pressure - actual pressure
- 9. 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
Correct Answer: have separate piston rods
- 10. 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
Correct Answer: all of the above
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