Master Plumber Practice Exam

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Prepare for the Master Plumber Exam. Use practice questions, flashcards, and detailed explanations. Ace your test with confidence!

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How high above floor level must pilots and burners of gas-fired water heaters be installed in residential garages?

24 inches
12 inches
18 inches
6 inches

The correct answer is: 18 inches

Gas-fired water heaters installed in residential garages must have their pilots and burners located at a minimum height of 18 inches above the floor level. This requirement is established to mitigate the risk of ignition from potential flammable vapors that may accumulate near the floor, especially in a garage where gasoline or other flammable liquids might be stored. By positioning the burners and pilot lights at this height, the design ensures that they are above the level at which heavier-than-air vapors would settle, thereby reducing the risk of fire and ensuring greater safety in the home. This standard is an essential component of safe water heater installation practices in residential settings, reflecting the importance of adhering to building codes and safety guidelines.