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Steam Boilers, Engines, Nozzles and Turbines

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

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

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Steam Boilers, Engines, Nozzles and Turbines
Evaporative capacity of boiler is expressed as

kg of steam produced
kg of fuel fired
kg of steam produced per kg of fuel fifed
Steam pressure produced

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Steam Boilers, Engines, Nozzles and Turbines
Pick up wrong statement about desired properties of a good fuel

High ignition point
High calorific value
Produce minimum smoke and gases
Ease in storing

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Steam Boilers, Engines, Nozzles and Turbines
Multi-stage steam turbines are of the

Pressure compounded type
All of these
Reaction type
Velocity compounded type

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Steam Boilers, Engines, Nozzles and Turbines
The maximum efficiency of a reaction turbine is

(1 + cos²α)/2 cos²α
2 cos²α/(1 + cos²α)
(1 + sin²α)/2 sin²α
2 sin²α/(1 + sin²α)

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Steam Boilers, Engines, Nozzles and Turbines
The action of steam in a steam turbine is

Dynamic
Static and dynamic
Neither static nor dynamic
Static

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