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Steam Boilers, Engines, Nozzles and Turbines

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.

Four times
Three times
Twice
Equal to

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Steam Boilers, Engines, Nozzles and Turbines
The length of Cornish boiler varies from

3 to 5 m
7 to 9 m
2 to 4.5 m
5 to 7.5 m

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

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

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Steam Boilers, Engines, Nozzles and Turbines
Parson's turbine is a

Simple impulse turbine
Simple reaction turbine
Impulse-reaction turbine
None of these

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Steam Boilers, Engines, Nozzles and Turbines
The high pressure and low pressure cylinders in a receiver type compound engine are regarded as having cranks

90° to each other
180° to each other
None of these
0° to each other

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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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