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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
By compounding the expansion of steam in two or more cylinders, the length of stroke

None of these
Does not change
Increases
Decreases

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Steam Boilers, Engines, Nozzles and Turbines
In locomotives, the draught is produced by

Both combined (A) and (B)
Induced draft fan
Steam jet draught
Chimney

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Steam Boilers, Engines, Nozzles and Turbines
The aim of a compound steam engine is

To reduce the length of stroke
To reduce the ratio of expansion in each cylinder
All of these
To reduce the temperature range in each cylinder

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Steam Boilers, Engines, Nozzles and Turbines
The average value of diagram factor lies between

0.5 to 0.65
0.8 to 1.2
0.65 to 0.9
0.2 to 0.5

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

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

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Steam Boilers, Engines, Nozzles and Turbines
A throttle governed steam engine develops 15 kW with 280 kg per hour of steam and 35 kW with 520 kg per hour of steam. The steam consumption in kg per hour when developing 20 kW will be nearly

210 kg/h
150 kg/h
340 kg/h
280 kg/h

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