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Steam Boilers, Engines, Nozzles and Turbines

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

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

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Steam Boilers, Engines, Nozzles and Turbines
Parson's turbine is a

Simple reaction turbine
Impulse-reaction turbine
Simple impulse turbine
None of these

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Steam Boilers, Engines, Nozzles and Turbines
The natural draught is produced by

Chimney
Steam jet
Centrifugal fan
Both (A) and (B)

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Steam Boilers, Engines, Nozzles and Turbines
The velocity of steam leaving the nozzle (V) is given by (where K = Nozzle coefficient or nozzle efficiency, and hd = Enthalpy or heat drop during expansion of steam in a nozzle)

V = 44.72 K hd
V = 44.72 hd K
V = 44.72 K hd
V = 44.72 K hd

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Steam Boilers, Engines, Nozzles and Turbines
When the circulation of water, in a boiler, is by convection currents which are set up during the heating of water, then the boiler is known as

Natural circulation boiler
Forced circulation boiler
Internally fired boiler
Externally fired boiler

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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 solidity is 0.65
Blade velocity coefficient is unity
Blades are equiangular

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