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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Hygrometry deals with the

Temperature of air
Water vapor in air
Pressure of air
Hygroscopic substances

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Steam Boilers, Engines, Nozzles and Turbines
A throttle governed steam engine develops 15 kW with 280 kg per hour of steam and 35 kW with 520 kg per hour of steam. The steam consumption in kg per hour when developing 20 kW will be nearly

210 kg/h
280 kg/h
150 kg/h
340 kg/h

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Steam Boilers, Engines, Nozzles and Turbines
The impulse turbine rotor efficiency will have a maximum value of 0.5 cos 2α, where α is the nozzle exit flow angle, if the

Blades are equiangular and frictionless
Blade velocity coefficient is unity
Blades are equiangular
Blade solidity is 0.65

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following gases has the highest calorific value?

Producer gas
Coal gas
Water gas
Blast furnace gas

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Steam Boilers, Engines, Nozzles and Turbines
The flow through a nozzle is regarded as

Constant pressure flow
Isentropic flow
Constant volume flow
Isothermal flow

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Steam Boilers, Engines, Nozzles and Turbines
An economiser _________ the steam raising capacity of a boiler.

Has no effect on
Decreases
None of these
Increases

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