This is the third of our seven Air Brakes CDL practice tests. Please take all of the practice tests to increase your chance of doing well on the actual test!
Our free Air Brakes CDL practice test contains 10 questions. There is no time limit on the test. You must answer every question.
You’re welcome to retake this test as many times as you’d like. If you want to improve your score or just need more practice, click the ‘Restart Quiz’ button at the end of the test. The questions will be displayed in a different order but they’ll be the same questions you already answered. The second time around you should know the answers!
Feel free to retake this test as many times as you’d like. Once you receive your score there will be a button to View Questions. Wrong answers will be highlighted in red. The correct answer will be in a green box outlined in green.
Being the driver of a commercial vehicle is a huge responsibility. The written CDL test isn’t that bad. The actual driving test is rigorous. Inspectors do not want anyone on the road who isn’t capable of handling a big rig. Make sure you practice your driving and especially BACKING UP.
Congratulations on your decision to become a commercial driver!
Air Brakes CDL Practice Test 3
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Question 1 of 10
During cold weather, how often should you check the alcohol evaporator __________.CorrectIncorrect
Question 2 of 10
What is the purpose of the safety release valve in the first air tank?CorrectIncorrect
Question 3 of 10
The brake pedal is also called the __________.CorrectIncorrect
Question 4 of 10
What can happen if the brake pedal is pressed and released too often?CorrectIncorrect
Question 5 of 10
The foundation brakes are found __________.CorrectIncorrect
Question 6 of 10
The brake shoes and linings are located __________.CorrectIncorrect
Question 7 of 10
When a brake lining is pushed against the inside of the drum __________.CorrectIncorrect
Question 8 of 10
On S-Cam brakes, what happens to the air when the brake pedal is pressed?CorrectIncorrect
Question 9 of 10
In which direction does the S-Cam force brake shoes when the brakes are applied?CorrectIncorrect
Question 10 of 10
If the air compressor starts to leak, what keeps air in the tanks?CorrectIncorrect