New Mexico Pipe Fitter Journeyman (JPF) Practice Exam

Are aluminum and wooden plugs used to keep a plastic pipe round while being threaded?

1. True

2. False

3. Only aluminum plugs

4. Only wooden plugs

The correct answer is: True

Aluminum and wooden plugs are indeed used to help maintain the shape of plastic pipes when threading. These materials provide support to counteract any potential deformation that may occur in plastic. When a plastic pipe is subjected to the mechanical forces during the threading process, it can sometimes lose its round shape due to the pressure or the torque applied. Using plugs made of aluminum or wood ensures that the pipe remains round, allowing for more precise and effective threading without risking damage to the pipe. The choice reflects an accurate understanding of the practices involved in preparing plastic pipes for threading, highlighting that both aluminum and wooden plugs serve the same purpose of supporting the pipe during this process, ensuring good quality threads and maintaining the integrity of the pipe.