Commercial Driver License (CDL) Class B Practice Test

Which of the following should you check during a trip?

1. Speedometer and radio

2. Cargo covers and lights

3. Navigation system

4. Air conditioning and heating

The correct answer is: Cargo covers and lights

Checking cargo covers and lights during a trip is essential for ensuring safety and compliance with regulations. Cargo covers help secure the load, preventing any shifting that might affect the vehicle's stability or cause items to fall out, potentially creating hazards on the road. Additionally, functioning lights are crucial for visibility and communication with other drivers, especially in low-light conditions or inclement weather. While keeping an eye on the speedometer and the radio can enhance driving comfort and compliance, they do not directly impact safety related to cargo integrity or visibility. The navigation system is important for route guidance, but once set before departure, continuous checking is not as critical unless circumstances change. Similarly, air conditioning and heating contribute to driver comfort, but they are not as pertinent to immediate safety checks during a trip.