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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The performance of a boiler is measured by the

All of the listed here
Steam produced in kg/h
Amount of water evaporated per hour
Steam produced in kg/kg of fuel burnt

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Steam Boilers, Engines, Nozzles and Turbines
On Millier chart, the constant pressure lines

Diverge from left to right
Diverge from right to left
First rise up and then fall
Are equally spaced throughout

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Steam Boilers, Engines, Nozzles and Turbines
An economiser is installed in a boiler primarily to

All of the listed here
Reduce fuel consumption
Increase steam pressure
Superheat the steam

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Steam Boilers, Engines, Nozzles and Turbines
The pressure of reheat steam after passing through reheater compared to inlet condition is

Less
May be more or less depending on capacity of reheater
More
Equal

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Steam Boilers, Engines, Nozzles and Turbines
The friction in the nozzle __________ exit velocity of steam.

Decreases
Has no effect on
None of these
Increases

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

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

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