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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The maximum efficiency of a reaction turbine is

(1 + cos²α)/2 cos²α
2 sin²α/(1 + sin²α)
2 cos²α/(1 + cos²α)
(1 + sin²α)/2 sin²α

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following boiler is best suited to meet the fluctuating demand of steam?

Lancashire boiler
Babcock and Wilcox boiler
Locomotive boiler
Cornish boiler

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Steam Boilers, Engines, Nozzles and Turbines
Curtis turbine is a

Pressure compounded turbine
Velocity compounded turbine
Simple reaction turbine
Pressure-velocity compounded turbine

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Steam Boilers, Engines, Nozzles and Turbines
In water wall furnace, the heat is transferred to the water walls by

Convection
Radiation and conduction
Radiation
Conduction

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

0.582
0.546
0.528
0.577

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Steam Boilers, Engines, Nozzles and Turbines
Cut-off ratio is the ratio of

Swept volume to the volume at cut-off
Volume at cut-off to the swept volume
Clearance volume to the volume at cut-off
Volume at cut-off to the clearance volume

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