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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The ratio of heat equivalent to brake power to the energy supplied in steam is known as

Brake thermal efficiency
Indicated thermal efficiency
Mechanical efficiency
Overall efficiency

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Steam Boilers, Engines, Nozzles and Turbines
The critical pressure gives the velocity of steam at the throat

More than the velocity of sound
Less than the velocity of sound
Equal to the velocity of sound
None of these

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Steam Boilers, Engines, Nozzles and Turbines
In which of the following boilers, the draught in furnace is increased by utilising exhaust steam from engine

Benson boiler
Lancashire boiler
Locomotive boiler
Babcock and Wilcox boiler

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Steam Boilers, Engines, Nozzles and Turbines
The critical pressure ratio is given by (where p₁ = Initial pressure of steam, and p₂ = Pressure of steam at throat or critical pressure)

p₁ + p₂
p₁. p₂
p₂/p₁
p₁/p₂

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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
Clearance ratio
None of these

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Steam Boilers, Engines, Nozzles and Turbines
Cochran boiler is a

Horizontal water tube boiler
Vertical fire tube boiler
Vertical water tube boiler
Horizontal fire tube boiler

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