Arizona Plumbing Practice Exam

The Corporation Commission has assigned color codes to identify the location of underground facilities. What color identifies gas distribution and transmission?

1. High visibility safety yellow

2. Bright orange

3. Blue

4. Red

The correct answer is: High visibility safety yellow

The color that identifies gas distribution and transmission is high visibility safety yellow. This specific color coding is significant in the context of safety regulations for underground utilities. Colors are standardized to help workers, contractors, and the general public easily identify the type of underground facility they might encounter, thus ensuring safe excavation and construction practices. High visibility safety yellow is specifically designated for gas facilities because it stands out prominently in various environments, reducing the risk of accidental contact or damage during excavation. This is particularly crucial since natural gas lines can pose serious hazards if compromised. The other colors are assigned to different utilities; for instance, bright orange usually signifies communication cables, blue is often used for potable water lines, and red indicates electric utilities. By using these color codes, it helps maintain a common understanding among individuals working near or around these utilities, ultimately contributing to overall safety and efficiency in plumbing and construction activities.