Question 89Steam Plants - QMED

The correct answer is D) force the feed water into the boiler. The pressure in the feed water system must exceed the boiler steam drum pressure in order to force the feed water into the boiler. This ensures that the feed water is able to overcome the steam pressure and enter the boiler, providing the necessary water supply for steam generation. The other options are incorrect because: A) Preventing air leakage is not the primary reason for the feed water pressure to exceed the steam drum pressure. B) Preventing water hammer is not the main purpose of the feed water pressure being higher than the steam drum pressure. C) Removing steam from the steam drum is not directly related to the feed water pressure requirement.