Arkansas CDL — Air Brakes Practice Test

The Arkansas CDL — Air Brakes knowledge test has ~25 questions; you need ~20 correct (80%) to pass.

Or take one of 10 full-length practice tests

25 questions · pass with 20 correct. You get instant feedback and an explanation after every answer.

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The full-length test, with feedback and an explanation after every answer.

Arkansas CDL — Air Brakes practice tests

10 full-length practice tests, each with 25 questions and a pass mark of 20, like the real test. You see the answers and explanations after you grade.

Test 1
25 questions · pass with 20
Among air-operated foundation brakes, which type does the manual call the most common?
Test 2
25 questions · pass with 20
A converter dolly was manufactured in 1999. What does the manual say about its ABS malfunction lamp?
Test 3
25 questions · pass with 20
Your truck's brake system is designed so that pressing the pedal while the spring brakes are on will not hurt anything. What does the manual still advise?
Test 4
25 questions · pass with 20
In a typical dual air brake system, which brakes does the secondary system run?
Test 5
25 questions · pass with 20
Since what year have all vehicles been built with automatic slack adjusters?
Test 6
25 questions · pass with 20
Some automatic air tank drains come fitted with electric heating devices. What are the heaters for?
Test 7
25 questions · pass with 20
Besides hiding the real fault, why does the manual call it dangerous to hand-adjust an automatic slack adjuster?
Test 8
25 questions · pass with 20
Since what year have all vehicles been built with automatic slack adjusters?
Test 9
25 questions · pass with 20
You press the brake pedal to slow for a red light in an air-braked truck. Which of its three braking systems is doing that work?
Test 10
25 questions · pass with 20
Your truck's brake system is designed so that pressing the pedal while the spring brakes are on will not hurt anything. What does the manual still advise?