Steam Boilers, Engines, Nozzles and Turbines
The function of injector used in small capacity boilers is to

Add make up water in the system
Create vacuum
Inject chemical solution in feed pump
Pump water, similar to boiler feed pump

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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

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

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