How would you connect the truck cabin to the semi-trailer?
- By driving backwards at an angle of less than 15 degrees.
- By pushing the semi-trailer forward until the truck cabin.
- Correct answer: By driving backwards when both of them are aligned in a straight line.
- By driving backwards while the cabin is in a diagonal angle or any other comfortable angle..
Why this is the answer
The correct answer in the official bank: By driving backwards when both of them are aligned in a straight line.
The truck cabin should reverse slowly toward the semi-trailer with both aligned in a straight line. This lets the trailer's kingpin enter the centre of the fifth wheel squarely so the coupling locks fully. Coupling at an angle, even a small one, risks a partial lock, damage to the mechanism and the trailer breaking loose while driving. Pushing the semi-trailer toward the cabin is unsafe and uncontrolled.