Safety Trained Supervisor in Construction (STSC) Practice Exam

What is the first action a supervisor should take upon witnessing an accident involving sparks and a fallen worker?

1. Secure sources of electricity

2. Continue observing the situation

3. Call the worker's family

4. Approach the worker to assess injury

The correct answer is: Secure sources of electricity

In the event of an accident involving sparks and a fallen worker, the first action a supervisor should take is to secure sources of electricity. This step is critical because electrical hazards can lead to further injuries not only for the injured worker but also for the supervisor and any other personnel present. By eliminating potential electrical sources, the risk of electrical shock, fire, or additional accidents is significantly reduced. Ensuring safety and preventing additional harm is paramount in any emergency situation, especially in construction settings where hazards can be prevalent. The immediate focus should always be on making the environment safe before attempting to assist the injured worker or assess their condition. Addressing the other choices: continuing to observe the situation would leave the worker and others at risk, calling the worker's family does not address immediate safety concerns, and approaching the worker to assess injury should only occur after ensuring that the scene is safe. Hence, securing sources of electricity is the most responsible and appropriate first action.