Massachusetts Plumbers Journeyman Practice Exam 2026 – All-in-One Guide to Master Your Licensing Test!

Question: 1 / 400

What should be the minimum width of an exposed surface on each side of a wiped joint?

¾ inch

1 inch

The minimum width of an exposed surface on each side of a wiped joint should be 1 inch. This measurement is important as it provides enough surface area for the joint to maintain integrity and support the plumbing system's functionality. A 1-inch width allows for a proper bond and ensures that any potential stresses or movements do not compromise the joint's seal.

When the surface area is adequately sized, it facilitates better heat distribution during the wiping process, which is crucial for achieving a strong, leak-proof joint. Additionally, this width helps to maintain the joint's structural integrity over time, especially in situations involving changes in temperature or pressure. Having less than 1 inch could weaken the joint and increase the risk of failure, while widths greater than this measurement aren't typically necessary unless specific conditions dictate otherwise.

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1 ½ inches

2 inches

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