Exercise: Steam Boilers And Engines

Questions for: Steam Boilers And Engines

The amount of water evaporated in kg per kg of fuel burnt is called
A:
evaporative capacity of a boiler
B:
equivalent evaporation from and at 100° C
C:
boiler efficiency
D:
none of these
Answer: A
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A condenser in a steam power plant
A:
increases expansion ratio of steam
B:
reduces back pressure of steam
C:
reduces temperature of exhaust steam
D:
all of these
Answer: D
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The draught (in mm of water), for maximum discharge of flue gases through the chimney, is given by (where H = Height ot the chimney in metres, and T1 = Absolute temperature of air outside the chimney in K)
A:
B:
C:
D:
Answer: D
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The ratio of the actual vacuum to the ideal vacuum in a condenser is called
A:
condenser efficiency
B:
vacuum efficiency
C:
nozzle efficiency
D:
boiler efficiency
Answer: B
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The factor of evaporation for all boilers is always
A:
equal to unity
B:
less than unity
C:
greater than unity
D:
Answer: C
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