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

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

ANSWER DOWNLOAD EXAMIANS APP

Steam Boilers, Engines, Nozzles and Turbines
In an impulse turbine

The steam is expanded in moving blades only
The steam is expanded both in fixed and moving blades continuously
The pressure and temperature of steam remains constant
The steam is expanded in nozzles only and there is a pressure drop and heat drop

ANSWER DOWNLOAD EXAMIANS APP

Steam Boilers, Engines, Nozzles and Turbines
Carbonization of coal is the process of

Strongly heating coal continuously for about 48 hours in the absence of air in a closed vessel
Binding the pulverized coal into briquettes
Heating wood in a limited supply of air at temperatures below 300°C
Pulverizing coal in inert atmosphere

ANSWER DOWNLOAD EXAMIANS APP