MCC-NH Gas Fitters Practice Exam

What must be ensured when using a larger pipe as a conduit for gas piping?

1. It must be sealed at both ends

2. It must be vented to prevent gas accumulation

3. It must be painted with protective coating

4. It must be filled with insulation

The correct answer is: It must be vented to prevent gas accumulation

When using a larger pipe as a conduit for gas piping, ensuring that it is vented to prevent gas accumulation is crucial for safety. Proper venting allows any potential gas leaks to escape rather than accumulating within the conduit. This is particularly important because gas can be hazardous if it builds up in an enclosed space, leading to risks of explosion or asphyxiation. Effective venting helps to maintain safe operating conditions by mitigating the risk of dangerous gas concentrations. While sealing the ends, applying protective coatings, or filling the pipe with insulation may have their own significance in certain contexts, they do not directly address the pressing safety concern of gas accumulation within a larger conduit. Thus, ensuring adequate venting is the most appropriate and critical measure when dealing with larger pipes used for gas transport.