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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
A device used to heat feed water by utilizing the heat in me exhaust flue gases before leaving through the chimney, is known as

Fusible plug
Superheater
Stop valve
Economizer

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Steam Boilers, Engines, Nozzles and Turbines
When the back pressure of a nozzle is below the designed value of pressure at exit of nozzle, the nozzle is said to be

Over-damping
None of these
Choked
Under-damping

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Steam Boilers, Engines, Nozzles and Turbines
In order to compare the capacity of boilers, the feed water temperature and working pressure are taken as

100°C and normal atmospheric pressure
50°C and normal atmospheric pressure
50°C and 1.1 bar pressure
100°C and 1.1 bar pressure

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Steam Boilers, Engines, Nozzles and Turbines
The saturation temperature of steam with increase in pressure increases

Linearly
Slowly first and then rapidly
Inversely
Rapidly first and then slowly

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Steam Boilers, Engines, Nozzles and Turbines
The length of Cornish boiler is of the order of

24 m
57.5 m
35 m
79 m

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Steam Boilers, Engines, Nozzles and Turbines
The maximum efficiency of a De-Laval turbine is (where α = Nozzle angle)

cos²α
tan²α
sin²α
cot²α

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MORE MCQ ON Steam Boilers, Engines, Nozzles and Turbines

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