How should a light check be performed on the bus?

• A. Only test the headlights
• B. Test each light while observing from outside the bus
• C. Check if the lights flicker when turning on
• D. Inspect lights after starting the engine

Answer: (B)

Performing a light check on the bus involves a thorough and systematic approach to ensure all lights are functioning properly. Testing each light while observing from outside the bus is essential because it allows the inspector to visually confirm that every light is operating as intended, including headlights, taillights, turn signals, and brake lights. This external observation is crucial for safety, as it ensures that other road users can see the bus signals clearly.

This process should be comprehensive, as each light plays a vital role in communicating the bus's movements and intentions to other drivers and pedestrians. The approach where the inspector is outside the bus provides a clear vantage point to assess whether all lights are working effectively without any obstructions or issues that might not be noticed from inside the bus.

Other options, such as only testing the headlights or checking for flickering lights, do not provide a complete picture of the bus's lighting system and might overlook malfunctioning lights that are critical for safety. Additionally, inspecting lights only after starting the engine may also be ineffective, as some lights can still function regardless of whether the engine is running. Thus, a complete exterior check is the best practice.