Practice question
A trailer service line ruptures on a spring brake priority trailer and spring brakes remain released. How can trailer braking be applied?
- Close the trailer supply valve so trailer spring brakes apply automatically
- Use the trailer hand valve as a parking brake
- Cross-connect the gladhands
- Open every rear shut-off valve
Answer: A — Close the trailer supply valve so trailer spring brakes apply automatically
The correct answer is shown above. Try the full quiz for additional practice.
Practice more: Ontario Air Brake Z Test Practice Questions - Ontario Air Brake (Z Endorsement) Knowledge Test Exam →