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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
In case of condensing steam engines, the pressure of steam in the cylinder during exhaust stroke is _________ the atmospheric pressure.

Higher than
Lower than
None of these
Equal to

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Steam Boilers, Engines, Nozzles and Turbines
The cylinder condensation or missing quantity may be reduced by

All of these
Superheating the steam supplied to the engine cylinder
Keeping the expansion ratio small in each cylinder
The efficient steam jacketing of the cylinder walls

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Steam Boilers, Engines, Nozzles and Turbines
In a 50% reaction turbine stage, tangential component of absolute velocity at rotor inlet is 537 m/s and the blade velocity is 454 m/s. The power output in kW of steam will be

282 kW
260 kW
302 kW
296 kW

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Steam Boilers, Engines, Nozzles and Turbines
All steam engines work on

Zeroth law of thermodynamics
Second law of thermodynamics
First law of thermodynamics
None of the listed here

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Steam Boilers, Engines, Nozzles and Turbines
Incomplete combustion can be best judged by

Smoky chimney exit
Measuring carbon monoxide in flue gases
Measuring temperature of flue gases at exit of furnace
Excess air in flue gases

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Steam Boilers, Engines, Nozzles and Turbines
The chimney draught varies with

Climatic conditions
Temperature of furnace gases
Height of chimney
All of these

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