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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
A wet vapor can be completely specified by

Dryness fraction only
Pressure only
Temperature only
Pressure and dryness fraction

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Steam Boilers, Engines, Nozzles and Turbines
Water tube boilers are

Internally fired
Internally as well as externally fired
None of these
Externally fired

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Steam Boilers, Engines, Nozzles and Turbines
The Locomotive boiler has

137 fire tubes and 44 superheated tubes
147 fire tubes and 34 superheated tubes
157 fire tubes and 24 superheated tubes
167 fire tubes and 14 superheated tubes

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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)

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

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Steam Boilers, Engines, Nozzles and Turbines
In a Woolf type compound engine, the high pressure and low pressure cylinders

Are set in V arrangement
Have separate piston rod
Have common piston rod
Are set at 90°

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of the clearance volume to the swept volume is called

Clearance ratio
Cut-off ratio
None of these
Expansion ratio

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