MCC-NH Gas Fitters Practice Exam

What is the significance of the tracer wire when installing gas piping in a trench?

1. To indicate pipe width

2. To locate the pipe during excavation

3. To reinforce the pipe against pressure

4. To provide electric current to the pipe

The correct answer is: To locate the pipe during excavation

The significance of tracer wire when installing gas piping in a trench primarily revolves around its ability to assist in locating the pipe during future excavation activities. Tracer wire is installed alongside the gas line, and it serves as a conductive pathway that can be detected using specialized locating devices. This allows utility workers or excavators to identify the precise location of the gas pipe without having to dig it up, helping to prevent accidental damage during future digging or construction projects. This practice is crucial for ensuring safety and minimizing the risk of gas leaks or other dangerous situations that could arise from unintentional breaches of the gas pipeline. The other choices do not align with the main purpose of tracer wire. For instance, while pipe width is important, it is not indicated through tracer wire. Similarly, tracer wire does not reinforce the pipe against pressure or provide electric current to the pipe, as its primary role is focused on location assistance and utility safety.