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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Stage efficiency is also known as

Nozzle efficiency
Gross efficiency
Diagram efficiency
None of these

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Steam Boilers, Engines, Nozzles and Turbines
The draught in locomotive boilers is produced by a

None of these
Steam jet
Chimney
Centrifugal fan

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Steam Boilers, Engines, Nozzles and Turbines
Calorific value of coal is of the order of

800-1200 kcal/ kg
2000-4000 kcal/ kg
200-400 kcal/ kg
5000-8000 kcal/ kg

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Steam Boilers, Engines, Nozzles and Turbines
In a Parson's turbine stage, blade velocity is 320 m/s at the mean radius and rotor blade exit angle is 30°. For minimum kinetic energy of the steam leaving the stage, the steam velocity at the exit of the rotor will be

640/3 m/s
640 m/s
320/3 m/s
160/3 m/s

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Steam Boilers, Engines, Nozzles and Turbines
The cylindrical shell of a Lancashire boiler has diameter from

1.5 to 2.5 m
1.25 to 2.25 m
1 to 2 m
1.75 to 2.75 m

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Steam Boilers, Engines, Nozzles and Turbines
In a compound steam engine, the first stage of expansion is carried out in a high pressure cylinder whereas the last expansion is completed in low pressure cylinder. The diameter of high pressure cylinder is _________ the low pressure cylinder.

More than
Less than
None of the listed here
Equal to

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