Tennessee Wastewater Operator Practice Exam

Which type of protection is considered best for deep excavations?

1. Basic fencing

2. Drag shields and shoring

3. Safety nets

4. Hard hats

The correct answer is: Drag shields and shoring

The best type of protection for deep excavations is drag shields and shoring. This method is essential in preventing collapses in trenches and ensuring the safety of workers. Drag shields help to direct any falling debris away from the excavation site, reducing the risk of injury from materials that may fall from the surrounding edges. Shoring refers to the use of supports to prevent the walls of the excavation from collapsing, which is critical in deep excavations where the risk of cave-ins is notably high. Deep excavations pose significant hazards due to their depth and the weight of the earth above, making it crucial to implement robust protective measures. The combination of drag shields and shoring provides a layer of safety that basic fencing, safety nets, and hard hats alone cannot achieve, as those options do not address the risks associated with the walls of the excavation or falling heavy materials. Thus, effective support and protective systems like shoring are vital for maintaining structural integrity in deep excavations and ensuring worker safety.