Ohio Volunteer Firefighter Practice Exam

How heavy is one gallon of water?

1. 6.5 lbs

2. 7.5 lbs

3. 8.33 lbs

4. 9 lbs

The correct answer is: 8.33 lbs

One gallon of water weighs approximately 8.33 pounds. This weight is based on the standard measurements used for water, which is the most commonly referenced liquid in weight calculations. The relationship between volume and weight can be understood through the concept of density. Water has a density of about 8.34 pounds per gallon at a temperature of 62 degrees Fahrenheit, which is why the figure is commonly rounded to 8.33 pounds for practical applications. This information is particularly important for firefighters and other emergency responders, as understanding the weight of water is crucial for calculating water supply needs during firefighting operations. Knowing that each gallon weighs 8.33 pounds helps responders assess the amount of water being transported and the load on their equipment. This choice aligns with standard measurements and provides the necessary context for practical applications in firefighting and emergency response situations.