When You Are About to Couple a Tractor 5th Wheel

question 22

Multiple Choice

When you are about to couple a tractor 5th wheel to a trailer upper coupler,which of the following must be true?

• A) trailer bolster plate should be about 1-inch higher than 5th wheel plate
• B) trailer bolster plate should be about 1-inch lower than 5th wheel plate
• C) 5th wheel jaws should in their closed position
• D) 5th wheel secondary lock should be in latched closed position

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