2024 HI CDL Practice Test: Class B - Test 2
Based on
2024 HI CDL Handbook
8. How do air-operated disc brakes work?
A
They use an air compressor to feed air through a brake pipe into air tanks on each car.
B
They use compressed air instead of hydraulic fluid.
C
All of the listed answers.
D
When the engineer applied these brakes, the pipe filled with air and squeezed the brakes.