Steam Boilers, Engines, Nozzles and Turbines
A compound steam engine in which piston rods of high pressure and low pressure cylinders ' are attached to two different cranks set at 180° to each other, is called

Tandem type compound engine
Receiver type compound engine
Woolf type compound engine
Both (A) and (B)

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

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

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