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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Reheating of steam in a turbine

All of these
Increases the efficiency of the turbine
Reduces wear on the blades
Increases the work-done through the turbine

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Steam Boilers, Engines, Nozzles and Turbines
The diameter of fire tubes in Cochran boiler is of the order of

8 cm
6 cm
2 cm
12 cm

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following is required for a steam condensing plant?

Air extraction pump
All of these
Condensate pump
Condenser

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Steam Boilers, Engines, Nozzles and Turbines
The clearance in the engine cylinder

Increases the mean effective pressure
Decreases the efficiency of the engine
Increases the workdone
All of these

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Steam Boilers, Engines, Nozzles and Turbines
The cylindrical shell of a Lancashire boiler has diameter from

1.25 to 2.25 m
1.5 to 2.5 m
1.75 to 2.75 m
1 to 2 m

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Steam Boilers, Engines, Nozzles and Turbines
The artificial draught is produced by

Centrifugal fan
Chimney
Steam jet
Both (A) and (B)

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