Ontario Class A Practice Test · Question
What is the primary function of the locking jaws on a fifth wheel assembly?
The locking jaws on a fifth wheel are specifically designed to grasp and secure the trailer's kingpin, ensuring a safe and reliable connection between the tract
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Question: What is the primary function of the locking jaws on a fifth wheel assembly?
Answer options:
- To allow the tractor to pivot freely during turns ✅ To secure the kingpin and prevent accidental uncoupling of the trailer
- To distribute the weight of the trailer evenly across the tractor's axles
- To provide a connection for the trailer's air lines
Correct answer: To secure the kingpin and prevent accidental uncoupling of the trailer
Explanation: The locking jaws on a fifth wheel are specifically designed to grasp and secure the trailer's kingpin, ensuring a safe and reliable connection between the tractor and the semi-trailer. This prevents accidental separation during operation.
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