Certified Pool Operator Practice Test 2025 - Free Pool Operator Practice Questions and Study Guide

Question: 1 / 400

How many BTUs are required to heat 1 gallon of water by 1 degree Fahrenheit?

5.33

6.25

7.50

8.33

To understand how many BTUs are required to heat 1 gallon of water by 1 degree Fahrenheit, it's important to know that one BTU (British Thermal Unit) is the amount of energy required to raise the temperature of one pound of water by one degree Fahrenheit.

Since 1 gallon of water weighs about 8.33 pounds, we need to multiply the weight of the water by the desired temperature change:

1 BTU raises 1 pound of water by 1 degree Fahrenheit. Therefore, to raise 8.33 pounds (which is equivalent to 1 gallon) by 1 degree Fahrenheit, it takes approximately 8.33 BTUs.

Thus, the correct answer, indicating that 1 gallon of water requires approximately 8.33 BTUs to raise its temperature by 1 degree Fahrenheit, is accurate because it reflects the necessary energy required based on the weight of water being heated.

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