What must be done before lining a switch? LISOP Look, inspect, sweep, operate switch and point at correct switch points

• A. Look, inspect, sweep, operate switch and point at correct switch points
• B. Inspect only
• C. Call the dispatcher
• D. Stand clear and wait

Answer: (A)

Before lining a switch you must perform the LISOP safety check: Look, Inspect, Sweep, Operate, and Point at the correct switch points. Looking lets you confirm the area is clear and that you can see the points and rails. Inspecting checks the switch for damage, loose parts, or any signs of misalignment. Sweeping clears debris or obstructions in the switch area that could prevent the points from moving freely. Operating throws the switch to the intended position and confirms it moves smoothly and locks in. Finally, pointing at the correct switch points provides a clear visual cue of which route is set, ensuring you and others know the exact alignment.

Skipping any step can hide hazards, misalignment, or miscommunication. The other options don’t guarantee a full readiness check or proper indication of the chosen route.