How much does a gallon of water weigh?

A gallon of water typically weighs approximately 8.34 pounds or about 3.78 kilograms. Thus, it is closest to the option that states 5 kg (11 lb).

Option C mentions 4 kg (88 lb), which is significantly incorrect, as it does not align with the known weight of a gallon of water. Understanding the weight of water is important for firefighters, as they often deal with water in various forms during firefighting operations. The ability to estimate water weight can impact decisions regarding the transport of water, pump operations, and overall strategy during fire suppression efforts.

By knowing the correct weight of a gallon of water, firefighters can make informed decisions that rely on accurate calculations of weight when dealing with water supplies, apparatus load limits, and hydraulic calculations.