Massachusetts Plumbers Journeyman Practice Exam

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Prepare for the Massachusetts Plumbers Journeyman Exam with confidence. Engage with interactive quizzes and challenging questions designed to enhance your knowledge and understanding. Equip yourself before the big day!

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 minimum diameter required for a standpipe connected to a commercial clothes washing machine?

1 inch
1¼ inches
1½ inches
2 inches

The correct answer is: 2 inches

The minimum diameter required for a standpipe connected to a commercial clothes washing machine is indeed 2 inches. This larger diameter is necessary to adequately handle the significant volume of wastewater discharged by commercial washing machines, which can release water at a higher rate and in greater quantity compared to residential machines. A standpipe of this size helps to prevent clogs and ensures that drainage is efficient, minimizing the risk of backflow or overflow during operation. Furthermore, plumbing codes and manufacturer specifications often require a 2-inch standpipe for commercial applications to guarantee proper drainage performance and comply with safety regulations.