CDL Air Brakes Endorsement

Free practice tests, topic drills and exam strategy for the CDL Air Brakes Endorsement credential, administered by FMCSA + state DMVs. Each topic below has dedicated practice variants with answer explanations.

25 questionsExam length

80%Passing standard

state variesExam fee

5Topic domains

Practice by topic domain

Click any topic to start a drill. Each topic has two practice variants — do them on different days for spaced repetition.

1

Air Brake System Parts

2 practice variants · 12 questions each · instant scoring

Variant 1 · Variant 2

2

Dual Air Brake Systems

2 practice variants · 12 questions each · instant scoring

Variant 1 · Variant 2

3

Inspecting Air Brakes

2 practice variants · 12 questions each · instant scoring

Variant 1 · Variant 2

4

Using Air Brakes Safely

2 practice variants · 12 questions each · instant scoring

Variant 1 · Variant 2

5

Combination-Vehicle Air Brakes

2 practice variants · 12 questions each · instant scoring

Variant 1 · Variant 2

About the CDL Air Brakes

The CDL Air Brakes Endorsement is administered by FMCSA + state DMVs and runs 25 questions, with a passing score of 80%. The current exam fee is state varies. The official candidate handbook and registration is available from the FMCSA + state DMVs directly: view the official exam page →

This credential is part of the Skilled Trades & Transportation career field. Skilled-trade and transportation licensing exams cover commercial driving (CDL by the FMCSA and state DMVs), HVAC refrigerant handling (EPA Section 608, NATE), electrical journeyman/master licensure, plumbing, welding (AWS) and OSHA construction-safety credentialing. Each is administered by a federal agency or trade body with a state-issued license layered on top.

State-specific practice tracks

This is a state-licensed credential. Pick your state below for a state-specific practice variant including local statutes and the appropriate state board\'s candidate handbook references.