Ontario Class A Practice Test · Question
Before coupling a tractor to a semi-trailer, what is the first critical step a driver should perform?
Before coupling, it is crucial to inspect the fifth wheel (which includes checking for damage, proper lubrication, and that the jaw is open) to ensure a safe an
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Question: Before coupling a tractor to a semi-trailer, what is the first critical step a driver should perform?
Answer options:
- Raise the landing gear. ✅ Inspect the fifth wheel.
- Connect the air lines.
- Back the tractor under the trailer.
Correct answer: Inspect the fifth wheel.
Explanation: Before coupling, it is crucial to inspect the fifth wheel (which includes checking for damage, proper lubrication, and that the jaw is open) to ensure a safe and secure connection to the trailer kingpin.
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