Which of the following is not part of a pre-driver check?

The choice of checking the air conditioner is not considered a part of the pre-driver check because pre-driver checks primarily focus on the safety and operational readiness of the vehicle, which directly affects driving performance and safety. These checks generally include ensuring that all controls are properly adjusted and that safety mechanisms are in place, such as the handbrake being applied and the vehicle being in gear. Adjusting the steering wheel and mirrors are also crucial for ensuring the driver has full control and visibility while operating the vehicle.

In contrast, checking the air conditioner, while it may contribute to comfort, does not impact the immediate safety or effectiveness of driving the emergency vehicle. Pre-driver checks prioritize functionality and safety features that are essential for a safe driving experience.