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What is the correct order for the last steps of coupling once the jaws are locked?
- A.Raise the gear first, then back under the trailer
- B.Connect air and electrical lines, raise the landing gear, then remove chocks and test the trailer brakes
- C.Remove chocks before connecting any lines
- D.Test the brakes before locking the jaws
Correct answer
B. Connect air and electrical lines, raise the landing gear, then remove chocks and test the trailer brakes
Why
Lines go on before the gear comes up so the trailer brakes can be set and tested while the gear still supports the nose. A final brake test, lights check, and walk-around close the job before the combination moves.
Manual topic: Combination Vehicles - Coupling · From the General Knowledge practice bank (GK-143).