BC Class 1 Practice Test · Question
When performing a coupling procedure with a tractor and a semi-trailer, what is the correct action to take after backing the tractor until the fifth wheel is under the trailer and the kingpin is in the throat of the fifth wheel?
After engaging the fifth wheel with the kingpin, it is crucial to visually inspect the coupling to ensure the fifth wheel jaws have properly locked around the k
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Question: When performing a coupling procedure with a tractor and a semi-trailer, what is the correct action to take after backing the tractor until the fifth wheel is under the trailer and the kingpin is in the throat of the fifth wheel?
Answer options:
- Connect the air lines and electrical cable immediately
- Raise the landing gear fully ✅ Visually inspect the coupling to ensure the jaws have locked around the kingpin
- Drive forward to test the coupling
Correct answer: Visually inspect the coupling to ensure the jaws have locked around the kingpin
Explanation: After engaging the fifth wheel with the kingpin, it is crucial to visually inspect the coupling to ensure the fifth wheel jaws have properly locked around the kingpin. This confirms a secure connection before proceeding. Provincial handbooks emphasize this critical safety check.
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