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Why should the tractor be protected by its parking brake whenever you leave the cab during coupling?
- A.It makes coupling faster
- B.It charges the trailer faster
- C.It is only required on hills
- D.An unattended tractor that rolls during coupling can pin you or run away
Correct answer
D. An unattended tractor that rolls during coupling can pin you or run away
Why
You work between and beside the units during coupling, exactly where a rolling tractor is most dangerous. Setting the parking brake every time you step out is a non-negotiable habit.
Manual topic: Combination Vehicles - Coupling · From the Combination Vehicles practice bank (CV-035).