In sector set-up procedures, when does the scenario start?

• A. At the start of shift
• B. When students enter the lab
• C. After briefing
• D. After weather check

Answer: (B)

The scenario begins when students enter the lab and are ready to engage with the setup. This moment marks the start of the hands-on, active portion of the exercise, when interaction with equipment and tasks actually begins. Before that point, activities like briefing or safety checks (including weather considerations) are preparatory steps that set the stage but do not constitute the scenario itself. Starting the scenario at entry ensures everyone is present, aware, and able to participate from the same starting point, which is essential for safety and smooth execution. The other options describe pre-scenario activities or broader timeframes (like the shift) that aren’t the trigger for the active exercise.