MCC-NH Gas Fitters Practice Exam

How many threads should there typically be on a 3/4 inch black iron pipe?

1. 5 threads

2. 10 threads

3. 15 threads

4. 20 threads

The correct answer is: 10 threads

A 3/4 inch black iron pipe typically has around 10 threads per inch. This standard is based on the American National Standards Institute (ANSI) specifications, which dictate thread counts for various pipe sizes. The correct option reflects this common industry practice, ensuring proper connections and fittings between pipes and other components. Understanding this standard is essential for gas fitters as it directly impacts the integrity and safety of gas line installations. An insufficient number of threads can lead to weak connections or leaks, while an excessive number could make the installation unnecessarily complicated. Having a clear grasp of these specifications enables professionals to select appropriate materials and ensure the reliability of their work.