When can you leave your truck unattended without first applying the parking brakes or chocking the wheels?

• A. Never.
• B. Only on level ground.
• C. Whenever someone else is present.
• D. When the vehicle is in reverse.

Answer: (A)

You must always secure the vehicle before leaving it. Never leaving a truck unattended without applying the parking brake and placing wheel chocks is the safe and required practice. The parking brake holds the truck in place, and wheel chocks add a safety barrier against movement if the brake were to fail or if the vehicle is on any slope. Ground level or not, having someone present or the truck being in reverse does not change this rule. So the correct approach is to never leave it unattended without using the parking brake and wheel chocks.