Question 241Steam Plants - Assistant Engineer

The correct answer is C) 300 psig. According to the Coast Guard regulations, the maximum pressure allowed for the air tanks or pressure vessels on a vessel is 300 psig (pounds per square inch gauge). This is the regulatory limit set by the Coast Guard to ensure the safety of the vessel and its crew. The other options are incorrect because A) does not specify a pressure limit, B) refers to a pressure in kPa (kilopascals) which is not the standard unit used in the Coast Guard regulations, and D) is simply a reiteration of the correct answer.