MCC-NH Gas Fitters Practice Exam

When installing gas piping underground, clearance must be provided from:

1. Other gas lines only

2. Any other underground structure

3. Only electrical wiring

4. Surface obstacles such as trees or buildings

The correct answer is: Any other underground structure

The requirement for providing clearance from any other underground structure when installing gas piping underground is based on safety and accessibility. Maintaining distance from existing underground utilities such as water, sewage, electrical, and telecommunications lines minimizes the risk of damaging those lines during installation or future excavation. This clearance is critical for preventing potential hazards such as leaks, cross-contamination, or even explosions that may occur if gas piping is too close to other lines. It also ensures that there is sufficient space for maintenance, inspections, and repairs without interfering with other utilities. Adhering to these regulations enhances safety for both the installation process and future operations. Other options focus on narrower scopes, such as only gas lines, electrical wiring, or only surface obstacles. While each of these considerations is important, the comprehensive approach of allowing clearance from any underground structure ensures broader safety and compliance with relevant codes and standards.