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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The diameter of cylindrical shell of the Lancashire boiler is of the order of

2 to 4 m
1.75 to 2.75 m
1 to 1.75 m
1 to 1.25 m

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Steam Boilers, Engines, Nozzles and Turbines
The economiser is used in boilers to

Extract heat from the exhaust flue gases
Increase flue gas temperature
Economize on fuel
Increase thermal efficiency of boiler

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Steam Boilers, Engines, Nozzles and Turbines
The three "Ts" for good combustion are

Thorough mixing, total air and temperature
Temperature, time, and turbulence
Total air, time, and temperature
Total air, true fuel, and turbulence

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Steam Boilers, Engines, Nozzles and Turbines
Pulverized fuel is used for

More calorific value
Medium sized units
Better burning
Less radiation loss

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Steam Boilers, Engines, Nozzles and Turbines
A _________ in a boiler is used to put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit.

Stop valve
Safety valve
Blow off cock
Fusible plug

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Steam Boilers, Engines, Nozzles and Turbines
The discharge is __________ at critical pressure.

Minimum
None of these
Maximum
Zero

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