Question Proper coupling technique: Answers Is the same on all vehicles. Is essential to the safe operation of a vehicle. Includes ensuring that the fifth wheel plate is not greased. Can be learned over time. Explanation Knowing proper coupling and uncoupling technique is fundamental to the safe operation of combination vehicles. Improper coupling can be very dangerous. Take a FREE Practice Test Now This questions appears in the following tests: North Carolina Double , Delaware Combination , Illinois Combination , Wisconsin Combination ,