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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The rate of discharge through the nozzle ___ when the exit pressure is gradually reduced.

Decreases
Remains same
None of the listed here
Increases

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Steam Boilers, Engines, Nozzles and Turbines
For the same diameter and thickness of tube, a water tube boiler has ________ heating surface as compared to fire tube boiler.

More
None of these
Less
Equal

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Steam Boilers, Engines, Nozzles and Turbines
The high steam and low water safety valve is not used in

Cochran boiler
Lancashire boiler
Locomotive boiler
Cornish boiler

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Steam Boilers, Engines, Nozzles and Turbines
In impulse turbines, when friction is neglected, the relative velocity of steam at outlet tip of the blade is _________ the relative velocity of steam at inlet tip of the blade.

Less than
Greater than
None of these
Equal to

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Steam Boilers, Engines, Nozzles and Turbines
Cut-off ratio is the ratio of

Clearance volume to the volume at cut-off
Swept volume to the volume at cut-off
Volume at cut-off to the swept volume
Volume at cut-off to the clearance volume

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Steam Boilers, Engines, Nozzles and Turbines
In reaction turbines, the axial thrust is due to

Both (A) and (B)
None of these
Change in axial velocity
Pressure drop across the rotor

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