Question 1310 Deck General

The correct answer is A) prevents the backflow of hydrocarbon gasses into nonhazardous areas. The deck water seal in an inert gas system acts as a one-way valve, allowing the flow of inert gas into the cargo tanks while preventing the backflow of hydrocarbon vapors from the cargo tanks into non-hazardous areas. This is an important safety feature to prevent the potential ignition of flammable gases in areas where there may be ignition sources. The other options are incorrect because: B) refers to a different function of the inert gas system, C) describes the function of a pressure relief valve, and D) does not accurately describe the purpose of the deck water seal.