Massachusetts Plumbers Journeyman Practice Exam

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Study for the Massachusetts Plumbers Journeyman Exam. Prepare with multiple choice questions, hints, and detailed explanations. Ace your licensing exam with confidence!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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What is the maximum allowed piping distance from the trap outlet to the automatic vent fitting?

6 inches
8 inches
10 inches
12 inches

The correct answer is: 12 inches

The correct answer is 12 inches. In plumbing systems, particularly when working with traps and venting, it's critical to ensure that the distance from the trap outlet to the automatic vent fitting is within prescribed limits to ensure proper drainage and venting of the system. A distance of 12 inches is the maximum allowed because it helps maintain the efficiency of the venting system. If the distance exceeds this, it can lead to potential issues such as siphoning or malfunction of the trap, which can allow sewer gases to enter the living space and compromise sanitation. Therefore, adhering to this specific measurement is essential for safe and effective plumbing practices.