Which of the following weights corresponds to one gallon of water?

The weight of one gallon of water is commonly accepted to be approximately 8.35 pounds at room temperature. This value is crucial in fire service operations, particularly when calculating the necessary flow rates, pressures, and for understanding the weight of water carried on fire apparatus.

Water's density can vary slightly based on temperature, but for practical purposes in firefighting, 8.35 pounds per gallon is the standard reference. This figure is used extensively in determining how much weight a fire truck can safely carry, planning for water supply, and ensuring efficient operation during firefighting activities.

The other options represent weights that do not align with the standard measurement for a gallon of water, which can lead to inaccuracies in operations and logistics regarding water supply and use during emergencies.