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

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

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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
Inherent moisture and surface moisture are different things
It increases thermal efficiency
In some coals moisture may be present up to 40%

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