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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The balanced draft furnace is one using

Induced draft fan and forced draft fan
Forced draft fan and chimney
Induced draft fan and chimney
Any one of the above

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Steam Boilers, Engines, Nozzles and Turbines
During polytropic process

Heat transfer takes place across cylinder walls
All of these
Steam may be wet, dry or superheated after expansion
Work is done

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Steam Boilers, Engines, Nozzles and Turbines
The purpose of governing in steam turbines is to

Reduce the effective heat drop
Maintain the speed of the turbine
Completely balance against end thrust
Reheat the steam and improve its quality

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Steam Boilers, Engines, Nozzles and Turbines
Sublimation region is the region where

Liquid and vapor phases are in equilibrium
Solid, liquid and vapor phases are in equilibrium
Solid and liquid phases are in equilibrium
Solid and vapor phases are in equilibrium

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Steam Boilers, Engines, Nozzles and Turbines
Efficiency of Rankine cycle can be increased by

Increasing the expansion ratio
Increasing exhaust pressure
Decreasing initial steam pressure and temperature
Decreasing exhausts pressure

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Steam Boilers, Engines, Nozzles and Turbines
The shell of the Cochran boiler is made hemispherical

None of these
Both (A) and (B)
To give maximum space and strength
To withstand the pressure of steam inside the boiler

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