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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How many threads per inch are there on a 1-1/2 inch pipe?

8
11
11 1/2
12

The correct answer is: 11 1/2

For a 1-1/2 inch pipe, the standard threading is 11-1/2 threads per inch. This is consistent with the National Pipe Thread (NPT) standards used in plumbing. The 1-1/2 inch size is categorized as a nominal pipe size, and according to the standards, it has a specific number of threads per inch to ensure proper sealing and fitting between threaded pipes and fittings. The importance of this standardization lies in ensuring that components fit together securely and reliably, minimizing the risk of leaks. Knowing the correct thread count is essential for anyone working in plumbing to select the right fittings and to ensure compatibility with other piping components.