What is included in the inside check of a bus after starting the engine?

The inside check of a bus after starting the engine primarily focuses on ensuring that all safety and operational systems are functioning correctly. Inspecting lights and signals is a crucial part of this process. It ensures that all necessary indicators are operating properly, which is essential for the safety of the bus and its passengers. Properly functioning lights and signals are vital for visibility and communication with other road users, helping to prevent accidents.

While checking the fuel level, testing the air conditioning, and cleansing the windows are important aspects of bus maintenance and operation, they fall outside the immediate scope of the inside check performed after starting the engine. Checking the fuel level is typically done before starting the engine, testing the air conditioning may only be necessary in certain conditions or for comfort rather than safety, and cleansing the windows does not impact the operational readiness of the bus in the same way that ensuring lights and signals are functional does.