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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The ratio of the workdone on the blades to the energy supplied to the blades, is called

Blading efficiency
Gross or stage efficiency
Nozzle efficiency
Mechanical efficiency

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Steam Boilers, Engines, Nozzles and Turbines
The diameter of flue tube in a Cornish boiler is _________ that of the shell.

One-third
Three-fifth
One-fourth
Two-fifth

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Steam Boilers, Engines, Nozzles and Turbines
Lancashire boiler is

Internally fired boiler
Stationary fire tube boiler
All of these
Horizontal boiler

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Steam Boilers, Engines, Nozzles and Turbines
Willian’s line for the steam engine is a straight line relationship between the steam consumption per hour and

Efficiency
Brake power
Pressure of steam
Indicated power

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Steam Boilers, Engines, Nozzles and Turbines
If partial pressure of air and steam be ‘pa’ and ‘ps’ respectively in a condenser, then according to Dalton's law, the pressure in condenser is equal to

pa - ps
ps - pa
None of these
pa + ps

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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
p₂/p₁
p₁. p₂
p₁/p₂

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