What should you check about the space between the tractor frame and the trailer's nose (the 'apron') during inspection?
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Correct!
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Correct answer to question 86 (Combination Vehicles): That there is no dangerous gap suggesting the trailer is not fully seated on the fifth wheel
Why
A visible gap between the tractor frame and the trailer's apron can indicate the trailer is not fully and properly seated on the fifth wheel, which is a coupling problem that needs to be corrected before driving.
Updated: November 2026