Steam Boilers, Engines, Nozzles and Turbines
The indicated thermal efficiency is defined as the

Product of thermal efficiency and Rankine efficiency
Ratio of heat equivalent to indicated power to the energy supplied in steam
Ratio of thermal efficiency to the Rankine efficiency
Ratio of brake power to the indicated power

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

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

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Steam Boilers, Engines, Nozzles and Turbines
Pick up the wrong statement about water tube boiler in comparison to fire tube boilers

Rate of steam flow is more in former case
Former is used for high installed capacity
Former occupies less space for same power
Chances of explosion are less in former case

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