MCC-NH Gas Fitters Practice Exam

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Prepare for the MCC-NH Gas Fitters Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

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What must be done to underground piping passing through a foundation wall?

It should be painted for protection
It must be encased in a protective sleeve
It must be insulated
It should be allowed to flex

The correct answer is: It must be encased in a protective sleeve

For underground piping that passes through a foundation wall, encasing it in a protective sleeve is essential for several reasons. This protective sleeve serves as a barrier that safeguards the piping from potential damage caused by the edges of the foundation wall. The concrete can be abrasive and may impose stress on the pipe, leading to damage over time. Additionally, a protective sleeve helps prevent moisture ingress and corrosion, extending the life of the piping system. It also allows for slight movement or shifting of the foundation without compromising the integrity of the piping. While painting or insulating the pipe, or allowing it to flex may have some benefits in specific applications, they do not address the critical need to protect the pipe as it interfaces with the structural elements of the building. Therefore, encasement in a protective sleeve is the best practice to ensure both safety and durability of underground piping at this critical juncture.