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Steam Boilers, Engines, Nozzles and Turbines

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

Rankine efficiency
Internal efficiency
Stage efficiency
None of these

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following statement is correct for steam turbines as compared to reciprocating steam engines?

All of these
A steam turbine develops higher speeds
The steam consumption is less
The efficiency of steam turbine is higher

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Steam Boilers, Engines, Nozzles and Turbines
In a compound steam engine, the first stage of expansion is carried out in a high pressure cylinder whereas the last expansion is completed in low pressure cylinder. The diameter of high pressure cylinder is _________ the low pressure cylinder.

More than
None of the listed here
Less than
Equal to

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Steam Boilers, Engines, Nozzles and Turbines
There is always some steam left in the clearance space from the previous stroke. This steam left in the clearance space is called

Wet steam
Saturated steam
Superheated steam
Cushion steam

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

Cool the scanners
Transport and dry the coal
Provide air around burners for obtaining optimum combustion
Convert CO (formed in lower zone of furnace) into CO₂ at higher zone

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Steam Boilers, Engines, Nozzles and Turbines
The amount of water evaporated in kg per kg of fuel burnt is called

Evaporative capacity of a boiler
Equivalent evaporation from and at 100° C
None of these
Boiler efficiency

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