Exercise: Steam Boilers And Engines

Questions for: Steam Boilers And Engines

A double acting steam engine with a cylinder diameter of 190 mm and a stroke of 300 mm has a cut-off of 0.35. The expansion ratio for this engine is nearly
A:
1.05
B:
2.86
C:
6.65
D:
10.05
Answer: B
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The fire tubes in a Cochran boiler are
A:
horizontal
B:
vertical
C:
inclined
D:
Answer: A
Cochran boiler is a improved type of simple vertical boiler with horizontal fire tubes.
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The function of a safety valve is
A:
to blow off steam when the pressure of steam inside the boiler exceeds the working pressure
B:
to indicate the water level inside the boiler to an observer
C:
to measure pressure of steam inside the steam boiler
D:
none of the above
Answer: A
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When the circulation of water, in a boiler, is by a centrifugal pump, then the boiler is known as
A:
internally fired boiler
B:
externally fired boiler
C:
natural circulation boiler
D:
forced circulation boiler
Answer: D
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The power of a boiler may be defined as
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
Answer: B
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