Practice question

For the Kentucky CDL Combination Vehicles test, which statement is correct about locking jaws?

  1. Use actual loaded weight instead of GVWR or GCWR for CDL class decisions.
  2. Use the trailer hand valve for normal braking while driving.
  3. Skip the visual coupling inspection after a successful tug test.
  4. Fifth wheel jaws must close around the shank of the kingpin.

Answer: D — Fifth wheel jaws must close around the shank of the kingpin.

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