You take over a semitrailer which you have not used before. What must you remember before attaching the semitrailer?

You answered correctly. Before attaching a semitrailer that you have not used before, you must check the coupling pin for wear or damage to ensure that the connection is secure and safe. Additionally, there must be enough space between the driver's cabin and the semitrailer to prevent collisions during turns or when driving over uneven ground. It is not necessary for the tyres of the semitrailer and the truck tractor to be the same size, as they are designed to work together with different tyre sizes. These checks help ensure the safety and proper functioning of the vehicle combination.