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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The capacity of induced draft fan compared to forced draft fan in a boiler is

Same
More
Less or more depending on size of boiler
Less

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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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Steam Boilers, Engines, Nozzles and Turbines
Expanding steam to a very low pressure (high vacuum) in steam engines is

Essential
Uneconomical
Economical
Desirable

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Steam Boilers, Engines, Nozzles and Turbines
The number of flue tubes in Lancashire boiler is

One
Zero
Two
Four

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Steam Boilers, Engines, Nozzles and Turbines
A turbine is said to have an axial discharge when the steam leaves the blade tip at _________ to the direction of the blade motion.

270°
60°
180°
90°

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Steam Boilers, Engines, Nozzles and Turbines
The discharge of steam in a convergent-divergent nozzle __________ after the throat (i.e. in the divergent portion of the nozzle)

None of these
Remains constant
Decreases
Increases

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