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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Steam engine operates on

Joule cycle
Carnot cycle
Stirling cycle
Brayton cycle

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Steam Boilers, Engines, Nozzles and Turbines
O₂ content in atmospheric air on volume basis is

0.23
0.21
0.4
0.3

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

Brake thermal efficiency
Indicated thermal efficiency
Overall efficiency
Mechanical efficiency

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Steam Boilers, Engines, Nozzles and Turbines
Efficiency of a thermal cycle increases by

Reheating of steam
Regeneration
Cooling of steam
Both (A) and (B)

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following is correct? (Where pa = Actual mean effective pressure, pm = Theoretical mean effective pressure, and K = Diagram factor)

pa = pm + K
pa = pm/K
pa = pm × K
pa = K/pm

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

Remains constant
Increases
Decreases
Behaves unpredictably

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