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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Which of the following is correct? (Where pa = Actual mean effective pressure, pm = Theoretical mean effective pressure, and K = Diagram factor)

pa = pm + K
pa = K/pm
pa = pm × K
pa = pm/K

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Steam Boilers, Engines, Nozzles and Turbines
Size of boiler tubes is specified by

Mean diameter and thickness
Outside diameter and inside diameter
Outside diameter and thickness
Inside diameter and thickness

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Steam Boilers, Engines, Nozzles and Turbines
The stage efficiency (ηS) is given by (where ηB = Blading efficiency, and ηN = Nozzle efficiency)

ηS = ηB × ηN
None of the listed here
ηS = ηB / ηN
ηS = ηN / ηB

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Steam Boilers, Engines, Nozzles and Turbines
The pressure of steam in the engine cylinder at the beginning of the stroke is ________ the boiler pressure.

None of these
Less than
Equal to
Higher than

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Steam Boilers, Engines, Nozzles and Turbines
One kilowatt-hour energy is equivalent to

360 kJ
3600 kJ
3600 kW/sec
1000 J

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of heat actually used in producing the steam to the heat liberated in the furnace, is known as

Power of a boiler
Boiler efficiency
Equivalent evaporation
Factor of evaporation

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