Marina Exam Reviewer: Which statement is TRUE concerning protection of double bottom tanks against excessive pressure?

Marina Exam Reviewer

Which statement is TRUE concerning protection of double bottom tanks against excessive pressure? 

A. The tanks must be protected by overflows. 
B. The total area of the vents or the overflow shall be at least 125% of the area of the fill line. 
C. There must be twice as much vent area as the area of the fill line. 
D. Each vent for the tank must be equal to the area of the tank filling line. 




Answer:       B. The total area of the vents or the overflow shall be at least 125% of the area of the fill line. 

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