What checks are essential before coupling a trailer to a tractor unit?

What checks are essential before coupling a trailer to a tractor unit?

• A. Ensure kingpin is clean and secure; air supply and brakes released; parking brakes on; ensure coupling is fully latched; perform a tug test.
• B. Ensure air supply is available and the parking brakes are off; coupling latched.
• C. Verify that the load inside the trailer is secured before coupling.
• D. Check that the trailer is empty and upright.

Answer: (A)