CDL Air Brakes Endorsement/Topics

CDL Air Brakes Endorsement topics: what the test covers

6 main topics cover 78 of the 100 questions in the bank. Inspection Leak Tests is the biggest with 16 questions, Stopping Distance the smallest with 12. Pick one to drill, or take the full timed quiz.

Take the full timed quiz 20 free questions

The real test

Multiple-choice knowledge test · 80% to pass (49 CFR 383.135) · item count set by your state.

80% to pass · question count set by your state

How the bank is weighted

6 main topics, 78 of 100 questions

The wider the slice, the bigger that topic is among the main ones. Smaller topics live in the full bank. Each question is written from the official source and cites it.

Pick a topic

Drill one topic at a time

Before you pick a topic

The CDL Air Brakes Endorsement tests knowledge across 6 primary domains: Inspection Leak Tests, System Parts, Compressor Governor Tanks, Dual Brakes Spring, Stopping Distance, Brake Fade Use.

QuizCram covers 78 verified practice questions categorized by testing module, each citing official handbook rules.

The standard passing mark is 80% (Multiple-choice knowledge test · 80% to pass (49 CFR 383.135) · item count set by your state).