Exercise: Steam Boilers And Engines

Questions for: Steam Boilers And Engines

The clearance in the engine cylinder
A:
increases the mean effective pressure
B:
increases the workdone
C:
decreases the efficiency of the engine
D:
all of these
Answer: D
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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.
A:
Correct
B:
Incorrect
C:
D:
Answer: A
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In a receiver type compound engine, the high pressure and low pressure cylinders
A:
have common piston rod
B:
are set at 90°
C:
have separate piston rods
D:
are set in V - arrangement
Answer: C
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The cut-off ratio is the reciprocal of expansion ratio,
A:
Correct
B:
Incorrect
C:
D:
Answer: A
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Blow off cock in a boiler is used to
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
Answer: B
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