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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The clearance in the engine cylinder

Decreases the efficiency of the engine
Increases the mean effective pressure
Increases the workdone
All of these

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Steam Boilers, Engines, Nozzles and Turbines
A supercritical boiler is one that operates above the pressure and temperature of following values

218 kg/cm² abs and 373°C
218 kg/cm² abs and 540°C
100 kg/cm² and 540°C
1 kg/cm² and 100°C

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following substance will have same percentage in both proximate and ultimate analysis?

Ash
Moisture
Hydrogen
Volatile matter

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Steam Boilers, Engines, Nozzles and Turbines
The length of Lancashire boiler varies from

9 to 10 m
5 to 6 m
7.25 to 9 m
6 to 7 m

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Steam Boilers, Engines, Nozzles and Turbines
Reheating of steam under ideal conditions takes place at constant

Temperature
Enthalpy
Entropy
Pressure

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Steam Boilers, Engines, Nozzles and Turbines
In a throttling process

Steam pressure remains constant
Steam enthalpy remains constant
Steam entropy remains constant
Steam temperature remains constant

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