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Steam Boilers, Engines, Nozzles and Turbines

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

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

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Steam Boilers, Engines, Nozzles and Turbines
The length of shell of a Locomotive boiler is

1 m
3 m
2 m
4 m

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Steam Boilers, Engines, Nozzles and Turbines
The high pressure and low pressure cylinders in a Tandem type compound engine are regarded as having cranks

None of these
0° to each other
90° to each other
180° to each other

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Steam Boilers, Engines, Nozzles and Turbines
The feed check valve is used in order to

Recirculate unwanted feed water
Check level of water in boiler drum
Allow high pressure feed water to flow to drum and not allow reverse flow to take place
Regulate flow of boiler water

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of the isentropic heat drop to the heat supplied, is called

Internal efficiency
Reheat factor
Stage efficiency
Rankine efficiency

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Steam Boilers, Engines, Nozzles and Turbines
Vacuum for reciprocating steam engines compared to steam turbines is

More
Could be more or less depending on the size of plant
Equal
Less

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