It shall be unlawful to fill a cargo tank or tank truck with gasoline through an _____________.

It shall be unlawful to fill a cargo tank or tank truck with gasoline through an _____________.

• A. Open Dome
• B. Open Vent
• C. Open Hatch
• D. Open Access

Answer: (A)

Gasoline transfer must use a closed, properly fitted fill connection to limit flammable vapor release and reduce ignition risk. An open dome on top of a cargo tank provides an unobstructed path for vapors to escape into the surrounding air and can allow vapors to accumulate near the truck, creating a serious fire or explosion hazard. Keeping the dome closed and utilizing the designated fill opening with its venting system is essential for safe fueling. The other openings are designed for vents, access, or maintenance and are not intended as the fill path; using them would bypass the safety fittings and increase danger. Therefore, filling through an open dome is unlawful.

Gasoline transfer must use a closed, properly fitted fill connection to limit flammable vapor release and reduce ignition risk. An open dome on top of a cargo tank provides an unobstructed path for vapors to escape into the surrounding air and can allow vapors to accumulate near the truck, creating a serious fire or explosion hazard. Keeping the dome closed and utilizing the designated fill opening with its venting system is essential for safe fueling. The other openings are designed for vents, access, or maintenance and are not intended as the fill path; using them would bypass the safety fittings and increase danger. Therefore, filling through an open dome is unlawful.