General Contractor Practice Exam

What color is used to mark an area for locating utilities prior to excavation?

1. Red

2. Blue

3. White

4. Green

The correct answer is: White

The color used to mark an area for locating utilities prior to excavation is white. This practice is part of the American Public Works Association (APWA) color code for marking underground utilities, which is essential for safety and to prevent damage during excavation. White marks indicate the planned excavation area, helping ensure that underground utilities can be accurately located and avoided, thereby reducing the risk of accidents or service interruptions. In contrast, other colors in the APWA code have specific meanings: red is typically used to indicate electric utilities, blue represents potable water, and green is used for sewer and drain lines. Understanding and using the correct color code is vital for contractors and workers involved in excavation projects to comply with safety regulations and protect existing infrastructure.