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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
In a velocity compounded impulse turbine, when steam flows through the second row of moving blades,

Velocity increases
Velocity remains constant
Velocity decreases
Pressure remains constant

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Steam Boilers, Engines, Nozzles and Turbines
In a Parson's turbine stage, blade velocity is 320 m/s at the mean radius and rotor blade exit angle is 30°. For minimum kinetic energy of the steam leaving the stage, the steam velocity at the exit of the rotor will be

640/3 m/s
640 m/s
320/3 m/s
160/3 m/s

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Steam Boilers, Engines, Nozzles and Turbines
The reheat factor depends upon

Exit pressure
Initial pressure and superheat
All of these
Turbine stage efficiency

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

Stage efficiency
None of these
Rankine efficiency
Internal efficiency

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following is required for a steam condensing plant?

All of these
Air extraction pump
Condensate pump
Condenser

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of heat utilized to produce steam and the heat liberated in furnace is known as

Factor of evaporation
Boiler efficiency
Boiler effectiveness
Boiler evaporative capacity

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