Coupling can be tested by a driver: Do you currently have car insurance? Insurance is mandatory to drive in Ohio Yes I have insurance. But please show me your best quotes. No, please help me find the best insurance. Question Coupling can be tested by a driver: Answers Placing their fingers inside the coupling mechanism. Pulling against the pin of the second semi-trailer. Placing glue over the fifth wheel. Releasing the orange lever in the cab. Explanation It is essential to safety that a driver inspects coupling before starting a trip. Trailer coupling on a double or triple combination can be tested by pulling against the pin of the second semi-trailer. This questions appears in the following tests: District Of Columbia Double Oregon Double South Carolina Double