Arizona Plumbing Practice Exam

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Prepare for the Arizona Plumbing Exam with quizzes, flashcards, and multiple-choice questions; each with detailed explanations and helpful hints.

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What is the maximum diameter of a hole that may be bored in a 2 x 10 joist according to code?

2 inches
2 1/2 inches
3 inches
4 inches

The correct answer is: 3 inches

The maximum diameter of a hole that may be bored in a 2 x 10 joist is 3 inches. This specification is established by building codes to ensure the structural integrity of the joists while allowing for necessary plumbing, electrical, and other utility installations. Boring a hole allows for passage of various systems without compromising the strength of the joist. The size limitation is important; if the hole is too large, it could weaken the joist and lead to structural failure. Codes are designed to protect against such risks by setting parameters based on the joist size. For a 2 x 10 joist, a 3-inch hole strikes a balance between functionality and the structural capacity of the material. Understanding these limits helps plumbers and builders comply with safety standards and maintain the longevity of the building's structural framework.