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

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

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

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

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Steam Boilers, Engines, Nozzles and Turbines
In fire tube boilers

The flames and hot gases pass through the tubes which are surrounded by water
Forced circulation takes place
Water passes through the tubes which are surrounded by flames and hot gases
None of these

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