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Steam Boilers, Engines, Nozzles and Turbines

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

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

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Steam Boilers, Engines, Nozzles and Turbines
During storage, the heating value of coal

Decreases
May increase or decrease depending upon the method of storage
Increases
Remain constant

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Steam Boilers, Engines, Nozzles and Turbines
A closed vessel made of steel and used for the generation of steam is called a

Steam condenser
Steam turbine
Steam boiler
Steam injector

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of the useful heat drop to the isentropic heat drop is called

Condenser efficiency
Vacuum efficiency
Boiler efficiency
Nozzle efficiency

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Steam Boilers, Engines, Nozzles and Turbines
The critical pressure ratio (p₂/p₁) is given by

(p₂/p₁) = [2/(n - 1)] n/(n + 1)
(p₂/p₁) = [2/(n + 1)] n/(n-1)
(p₂/p₁) = [(n + 1)/2] n - (1/n)
(p₂/p₁) = [(n - 1)/2] n + (1/n)

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Steam Boilers, Engines, Nozzles and Turbines
Water tube boilers are those in which

Water passes through the tubes and flue gases around it
Work is done during adiabatic expansion
Change in enthalpy
Flue gases pass through tubes and water around it

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