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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
One kilowatt-hour energy is equivalent to

1000 J
3600 kJ
360 kJ
3600 kW/sec

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Steam Boilers, Engines, Nozzles and Turbines
An economiser is generally placed between

Induced draft fan and forced draft fan
Last superheater or reheater and air preheater
Air preheater and chimney
None of these

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Steam Boilers, Engines, Nozzles and Turbines
For the same length of stroke and speed of crankshaft, the piston speed for a double acting steam engine is _________ the piston speed of single acting steam engine.

Twice
Three times
Equal to
Four times

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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
Which of the following boilers is best suited to meet fluctuating demands?

Babcock and Wilcox
Lancashire
Cochran
Locomotive

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Steam Boilers, Engines, Nozzles and Turbines
In a reaction turbine, when steam flows through the moving blades,

Pressure decreases while velocity increases
Pressure and velocity both increases
Pressure and velocity both decreases
Pressure increases while velocity decreases

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