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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The ratio of the workdone on the blades to the energy supplied to the blades, is called

Nozzle efficiency
Gross or stage efficiency
Blading efficiency
Mechanical efficiency

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Steam Boilers, Engines, Nozzles and Turbines
Maximum energy loss in a boiler occurs due to

Ash content
Flue gases
Incomplete combustion
Unburnt carbon in ash

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Steam Boilers, Engines, Nozzles and Turbines
The steam enters the nozzle at a

Low pressure and a low velocity
High pressure and a low velocity
Low pressure and a high velocity
High pressure and a high velocity

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Steam Boilers, Engines, Nozzles and Turbines
Primary air is the air used to

Provide air around burners for obtaining optimum combustion
Transport and dry the coal
Air delivered by forced draft fan
Convert CO (formed in lower zone of furnace) into CO₂ at higher zone

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of the actual vacuum to the ideal vacuum in a condenser is called

Vacuum efficiency
Condenser efficiency
Boiler efficiency
Nozzle efficiency

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Steam Boilers, Engines, Nozzles and Turbines
The rate of steam produced in Benson boiler is

175 tonnes/h
100 tonnes/h
135 tonnes/h
250 tonnes/h

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MORE MCQ ON Steam Boilers, Engines, Nozzles and Turbines

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