North Carolina Building Contractor License Practice Exam

The atmosphere in excavations greater than how many feet must be tested before workers may enter?

1. 4 feet

2. 5 feet

3. 6 feet

4. 10 feet

The correct answer is: 6 feet

Testing the atmosphere in excavations that are greater than 4 feet deep is a crucial safety requirement aimed at preventing potential hazards such as asphyxiation, toxic exposure, or explosive atmospheres. The correct answer, which indicates that testing must be conducted at depths greater than 5 feet, aligns with safety regulations to ensure that workers are not entering a hazardous environment. At depths of 5 feet or more, the risk of encountering dangerous gases or conditions increases, necessitating the implementation of proper safety protocols, including atmospheric testing. This proactive measure is vital for the health and safety of workers, helping to identify any risks before personnel enter the excavation. Such regulations are designed based on statistical data and industry experiences, emphasizing the importance of safety in construction and excavation operations. Testing helps determine if ventilation, protective equipment, or additional safety measures are required before entering the excavation site. This is part of a broader framework of ensuring the welfare of workers and enforcing compliance with occupational safety standards.