Ontario Class A Practice Test · Question
Scenario 125: Before coupling, the fifth wheel jaws must be:
Jaws open and the plate greased; trailer apron and kingpin clean before backing under. The correct answer is "Open and properly lubricated". This capacity-fill
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Question: Scenario 125: Before coupling, the fifth wheel jaws must be:
Answer options: ✅ Open and properly lubricated
- Closed and locked
- Removed for inspection
- Filled with sand
Correct answer: Open and properly lubricated
Explanation: Jaws open and the plate greased; trailer apron and kingpin clean before backing under. The correct answer is "Open and properly lubricated". This capacity-fill scenario 125 reinforces the same competency for the class1 bank and follows the certified explanation standard.
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