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

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

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

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