Question 922 Deck General

70% to pass

What is NOT required of the cargo tank venting on a tank barge carrying grade A liquids?

A A vent header must be fitted with a pressure-vacuum valve.
B The vent must extend to a reasonable height above the weather deck.
C The diameter of the vent must be greater than 4 inches in diameter.
D Each cargo tank must have a vent.
AI Explanation

The correct answer is C) The diameter of the vent must be greater than 4 inches in diameter. The reasoning behind this is that the regulations do not specify a minimum diameter for the vent on a tank barge carrying grade A liquids. The regulations only require that each cargo tank have a vent, and that the vent must extend to a reasonable height above the weather deck and be fitted with a pressure-vacuum valve. There is no requirement for the vent diameter to be greater than 4 inches. The other options are incorrect because A) and B) are required by the regulations, while D) is also a requirement for tank barges carrying grade A liquids.

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