Steam Boilers, Engines, Nozzles and Turbines
The diagram efficiency is the ratio of

Workdone on the blades to the energy supplied to the blades
None of these
Energy supplied to the blades per kg of steam to the total energy supplied per stage per kg of steam
Workdone on the blades per kg of steam to the total energy supplied per stage per kg of steam

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Steam Boilers, Engines, Nozzles and Turbines
Which is not the correct statement about moisture in coal?

It increases thermal efficiency
Inherent moisture and surface moisture are different things
In some coals moisture may be present up to 40%
Some moisture in coal helps in better burning which is not possible with completely dry coal

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Steam Boilers, Engines, Nozzles and Turbines
Boiler H.P. is defined as the

Work done in evaporating 1 kg of steam per hour from and at 100°C into dry saturated steam
Work done by 1 kg of steam at saturation condition
The evaporation of 15.65 kg of water per hour from and at 100°C into dry saturated steam
Steam evaporation rate per kg of fuel fired

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