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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

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

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Steam Boilers, Engines, Nozzles and Turbines
The draught produced by a steam jet issuing from a nozzle placed in the chimney is called

Chimney draught
None of these
Induced steam jet draught
Forced steam jet draught

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Steam Boilers, Engines, Nozzles and Turbines
The maximum discharge through a chimney occurs when the height of chimney is

Equal to the height of the hot gas column producing draught
Around 200 meters
Outside temperature is very low
Infinitely long

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Steam Boilers, Engines, Nozzles and Turbines
The turbine blades are

Circular
Curved
Straight
None of these

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Steam Boilers, Engines, Nozzles and Turbines
Willian's law states that the steam consumption per hour provided with a throttled governor is proportional to (where I.P. = Indicated power)

1/(I.P)
I.P.
1/(I.P)²
(I.P.)²

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Steam Boilers, Engines, Nozzles and Turbines
The critical pressure ratio for initially wet steam is

0.546
0.577
0.601
0.582

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