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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
A vessel into which the steam is exhausted and condensed after doing work in an engine cylinder or turbine is known as

Steam boiler
Economiser
Steam condenser
Steam preheater

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Steam Boilers, Engines, Nozzles and Turbines
For the same length of stroke and speed of crankshaft, the piston speed for a double acting steam engine is _________ the piston speed of single acting steam engine.

Four times
Equal to
Three times
Twice

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of the actual vacuum to the ideal vacuum in a condenser is called

Vacuum efficiency
Nozzle efficiency
Boiler efficiency
Condenser efficiency

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Steam Boilers, Engines, Nozzles and Turbines
1 kg.m is equal to

9.81 Joules
None of these
427 Joules
102 Joules

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Steam Boilers, Engines, Nozzles and Turbines
The cylindrical shell of a Lancashire boiler has diameter from

1 to 2 m
1.5 to 2.5 m
1.25 to 2.25 m
1.75 to 2.75 m

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Steam Boilers, Engines, Nozzles and Turbines
While steam expands in turbines, theoretically the entropy

Behaves unpredictably
Increases
Decreases
Remains constant

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