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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The Parsons' reaction turbine has

Only fixed blades
Only moving blades
Fixed and moving blades of different shape
Identical fixed and moving blades

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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
Steam turbines are used for

Direct drive of fans, compressors, pumps
Electric power generation
All of these
Large marine propulsion

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Steam Boilers, Engines, Nozzles and Turbines
A device in which some portion of waste heat of flue gases is recovered to heat the air before it passes to the furnace for combustion purpose, is known as

Superheater
Economizer
Air-preheater
Injector

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of the volume at cut-off to the swept volume is called

Cut-off ratio
Expansion ratio
None of these
Clearance ratio

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Steam Boilers, Engines, Nozzles and Turbines
The velocity of whirl at outlet for an axial discharge turbine is

Zero
Maximum
Minimum
None of these

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