Question 1857 Deck General

The correct answer is D) made of non-ferrous metal, and be a flare or non-bite flareless type. This is the correct answer because the United States Coast Guard regulations require that fittings used in a gasoline supply line on board small passenger vessels must be made of non-ferrous metal, such as brass or copper, and they must be either a flare or non-bite flareless type. This is to prevent any potential spark or ignition source that could lead to a fire or explosion hazard. The other answer choices are incorrect because they do not meet the specific regulatory requirements for gasoline supply line fittings on small passenger vessels. Options A, B, and C do not specify the required non-ferrous metal construction or the flare/non-bite flareless type of fitting.