Practice question
During the air brake pre-trip, how do you test that the spring brakes apply automatically?
- Apply the foot brake hard while driving
- Continue fanning the brakes until air pressure drops far enough; the spring brakes should apply between roughly 20 and 45 psi
- Pull the parking brake at 60 psi
- Drain the secondary tank only
Answer: B — Continue fanning the brakes until air pressure drops far enough; the spring brakes should apply between roughly 20 and 45 psi
The correct answer is shown above. Try the full quiz for additional practice.
Practice more: NY CDL Air Brakes Practice Questions - New York CDL Air Brakes Knowledge Test Exam →