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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The ratio of heat equivalent to brake power to the energy supplied in steam is known as

Indicated thermal efficiency
Overall efficiency
Mechanical efficiency
Brake thermal efficiency

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Steam Boilers, Engines, Nozzles and Turbines
Adiabatic process is

Essentially an isentropic process
Reversible process
Non-heat transfer process
Constant temperature process

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Steam Boilers, Engines, Nozzles and Turbines
The critical pressure ratio for gases is

0.546
0.577
0.582
0.528

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Steam Boilers, Engines, Nozzles and Turbines
When the speed of the crankshaft is between 100 r.p.m. and 250 r.p.m., the engine said to be a

Medium speed steam engine
None of the listed here
Slow speed engine
High speed steam engine

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

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

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Steam Boilers, Engines, Nozzles and Turbines
The density of supersaturated steam is about __________ that of the ordinary saturated vapor at the corresponding pressure.

8 times
Same as
2 times
4 times

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