Cargo tanks/tank trucks shall never be located ______ while transferring Class 1, 2, or 3 liquids.

Cargo tanks/tank trucks shall never be located ______ while transferring Class 1, 2, or 3 liquids.

• A. Outdoors
• B. Indoors
• C. On Dock
• D. Inside Tank

Answer: (B)

Transferring Class 1, 2, or 3 liquids requires an area with good ventilation to prevent dangerous vapor buildup. These liquids can release flammable vapors that, in an enclosed indoor space, may accumulate quickly and create a high risk of ignition from any spark, hot surface, or static discharge. Keeping the operation outdoors or in a well-ventilated space reduces vapor concentration, improves control over ignition sources, and lowers the chance of a fire or explosion. That’s why locating the cargo tank indoors during transfer is prohibited.

Transferring Class 1, 2, or 3 liquids requires an area with good ventilation to prevent dangerous vapor buildup. These liquids can release flammable vapors that, in an enclosed indoor space, may accumulate quickly and create a high risk of ignition from any spark, hot surface, or static discharge. Keeping the operation outdoors or in a well-ventilated space reduces vapor concentration, improves control over ignition sources, and lowers the chance of a fire or explosion. That’s why locating the cargo tank indoors during transfer is prohibited.