Which of the following is NOT included in the list of truck items to check?

In a pre-trip inspection, the focus is on ensuring that all essential components of the vehicle are functioning properly to ensure safe operation. The items that are typically checked include mirrors, windshield wipers, and indicator lights, all of which play a critical role in visibility and communication with other drivers.

Mirrors are essential for proper visibility around the vehicle, helping to eliminate blind spots. Windshield wipers ensure that the driver can maintain clear visibility during adverse weather conditions. Indicator lights signal the driver’s intentions for turns and lane changes to others on the road, which is crucial for safety.

Spare tires, while important to have on hand in case of a flat, are not typically included in the pre-trip inspection checklist for the truck's operational components. The inspection primarily focuses on the equipment directly impacting the safety and functionality of the vehicle while driving, rather than accessories or additional tools that may be necessary during a breakdown scenario. Thus, the emphasis is on active components over passive spare equipment like spare tires.