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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Cut-off governing of steam engines is a method of controlling the engine output by varying

Volume of intake steam
Pressure of intake steam
All of these
Temperature of intake steam

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Steam Boilers, Engines, Nozzles and Turbines
Mechanical equivalent of heat for 1 kcal or Joule's equivalent is equal to

102 kg.m
539 kg.m
421 kg.m
421 kg.m

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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
Four times
Three times
Equal to

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Steam Boilers, Engines, Nozzles and Turbines
Sulphur content of fuels is very important to the plant operators because it

Has highly corrosive effect
Retards electric precipitation
Has high heating value
Promotes complete combustion

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Steam Boilers, Engines, Nozzles and Turbines
Caking coals are those which

Burn freely
Form lumps or masses of coke
Show little or no fusing action
Burn completely

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Steam Boilers, Engines, Nozzles and Turbines
In a velocity compounded impulse turbine, when steam flows through the second row of moving blades,

Pressure remains constant
Velocity increases
Velocity decreases
Velocity remains constant

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