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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The crown of the fire box is made hemispherical in order to

Give maximum strength
Give maximum space
Resist intense heat in fire box
Withstand pressure inside boiler

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following statement is correct for steam turbines as compared to reciprocating steam engines?

The steam consumption is less
A steam turbine develops higher speeds
The efficiency of steam turbine is higher
All 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.

Equal to
Twice
Four times
Three times

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Steam Boilers, Engines, Nozzles and Turbines
With increase in load, radiant superheater has

Linear characteristic
Drooping characteristic
Flat characteristic
Rising characteristic

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Steam Boilers, Engines, Nozzles and Turbines
By compounding the expansion of steam in two or more cylinders, the ratio of expansion

Decreases
Increases
None of these
Does not change

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Steam Boilers, Engines, Nozzles and Turbines
On Mollier chart, flow through turbine is represented by

Straight inclined line
Horizontal straight line
Curved line
Vertical straight line

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