On which of the following trailers and semi-trailers is it obligatory to install an independent brake?
- Correct answer: Trailers and semi-trailers with an all up weight of 8,000 kg or more.
- Trailers and semi-trailers with an all up weight that exceeds 19,000 kg.
- It is obligatory to install an independent brake on every trailer and semi-trailer, regardless of weight.
- Trailers and semi-trailers with an all up weight that exceeds 3,000 kg.
Why this is the answer
The correct answer in the official bank: Trailers and semi-trailers with an all up weight of 8,000 kg or more.
Heavy trailers and semi-trailers greatly lengthen stopping distance and raise the risk of skidding and jackknifing, so the towing vehicle's brakes alone are not enough. That is why trailers and semi-trailers with an all up weight of 8,000 kg or more must have their own independent brake acting on their wheels. The rule does not cover every trailer regardless of weight, and the threshold is not 3,000 or 19,000 kg.