CDL Vehicle Combination Practice Test

Using chocks to park a trailer that is not equipped with spring brakes is an important safety practice. In cases where trailers do not have spring brakes, relying solely on wheel chocks can be necessary to prevent rolling. The correct answer indicates that there may be situations when chocks are not required, such as parking on level ground or in circumstances where the brakes are fully functional and effective. While it is always wise to assess the parking situation, using chocks is particularly critical in conditions such as on inclines or when a trailer is parked for an extended period. However, if a trailer is parked on a level surface with proper braking systems engaged, it may not be necessary to use chocks every time. This understanding highlights the significance of evaluating each parking scenario independently, ensuring that safety measures like chocks are applied when essential to prevent movement.