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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The efficiency of a pressure-velocity compounded impulse turbine is __________ as compared to pressure compounded impulse turbine.

Same
None of these
Less
More

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Steam Boilers, Engines, Nozzles and Turbines
The blade friction in the impulse turbine reduces the velocity of steam by __________ while it passes over the blades.

15 to 20%
30 to 40%
20 to 30%
10 to 15%

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Steam Boilers, Engines, Nozzles and Turbines
Water tube boilers are those in which

Work is done during adiabatic expansion
Flue gases pass through tubes and water around it
Water passes through the tubes and flue gases around it
Change in enthalpy

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following compound steam engine requires a smaller flywheel?

Tandem type
Receiver type
Woolf type
All of these

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Steam Boilers, Engines, Nozzles and Turbines
The flow of steam is supersonic

At the throat of the nozzle
In the convergent portion of the nozzle
At the entrance to the nozzle
In the divergent portion of the nozzle

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of the volume at cut-off to the swept volume is called

Cut-off ratio
None of these
Expansion ratio
Clearance ratio

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