CDL Combination Vehicles TestCoupling and UncouplingMedium
What is the primary danger of attempting to couple a tractor to a trailer on uneven ground?
- AIncreased wear on the fifth wheel plate.
- BDifficulty in aligning the kingpin with the fifth wheel.
- CPotential for the trailer to roll or shift unpredictably.
- DDamage to the tractor's suspension system.
Show answer & explanationAnswer & explanation
Correct answer: C. Potential for the trailer to roll or shift unpredictably.
Coupling on uneven ground significantly increases the risk of the trailer rolling or shifting, even with brakes applied, leading to potential injury or damage during the coupling process.
Why the other options are wrong
- A. While possible, this is a secondary concern compared to safety.
- B. Alignment is harder, but the primary danger is uncontrolled movement.
- D. Damage to suspension is less likely than trailer movement and injury.
Uneven Ground Coupling Risks
Coupling on uneven ground creates significant risks, primarily the unpredictable movement or rolling of the trailer, which can cause serious accidents.
- Increases risk of trailer runaway.
- Makes alignment difficult.
- Can damage equipment.
Memory trick: Level ground for a secure sound.