CDL Air Brakes

27 practice questions, split into sets of 50

Real CDL Air Brakes exam: 25 questions, 80% to pass

Free CDL practice test for the CDL Air Brakes. The CDL general knowledge test has 25 questions — work through 27 CDL practice test questions in English and Spanish to learn exactly how many questions are on the CDL test and what to expect. Administered by FMCSA with an 80% passing score requirement. Key topics include Air brake system components, Dual air brake systems, Spring brakes and parking, and more.