On a semi-trailer, what is the required distance, , between the driver’s cab and the front wall of the trailer?
- A distance allowing free movement of the braking system’s air pipes, and not more than 50cm.
- The distance depends on the length of the cab and the position of the fifth wheel and should not be less than 400 cm.
- Correct answer: A distance in which both can move in all directions without touching each other, and that allows free movement of the connectors during maximal turn.
- The distance between the trailer and the cab should not be more than 150 cm.
Why this is the answer
The correct answer in the official bank: A distance in which both can move in all directions without touching each other, and that allows free movement of the connectors during maximal turn.
The rule sets no fixed number for this gap, because it varies from one combination to another. What matters is that the tractor and semi-trailer can move relative to each other in every direction without touching. The connectors, such as air pipes and cables, must also move freely even in the sharpest turn. That is why answers with a fixed minimum or maximum distance are wrong.