NM CDL Air Brakes study plan

Explain, in your own words, how the compressor, governor, and reservoirs work together to build and hold pressure, and sketch the flow from compressor to tanks

Identify the function of the foot valve, treadle, and brake chambers, and state what each does when you press the pedal

Distinguish the primary (rear) and secondary (front) circuits and describe what happens if one circuit loses pressure

Define cut-in and cut-out pressure ranges and explain why the governor matters for safe operation

Sequence the seven-step air brake pre-trip inspection in the correct order and state the target pressure behavior at each step

Perform and log a static leak test: build to governor cut-out, hold five minutes with engine off and brakes released, and record pressure drop

Perform and log an applied-brake leak test and compare results against acceptable limits

Explain what a low-pressure warning device must do and when it should activate

Test the parking brake and spring brake operation, including the push-pull knob behavior at normal and low pressure

Describe how to check slack adjuster travel and when a reading means the vehicle must be placed out of service

List the daily maintenance items a driver is responsible for versus what a mechanic must handle

Explain how moisture, oil, and contamination enter the system and how drains and air dryers address them

Describe the correct braking technique for a downgrade, including gear selection and why you avoid riding the brakes

Explain proper stopping distance management and following distance at highway speed with a heavy vehicle

Demonstrate the correct procedure for parking on a grade, including wheel chock and spring brake use

Explain the role of engine retarders and how they interact with air brakes in slippery conditions