This is the second 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 2
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Question 1 of 10
The air compressor connects to the engine with __________.CorrectIncorrect
Question 2 of 10
The air compressor governor controls __________.CorrectIncorrect
Question 3 of 10
Where is compressed air stored?CorrectIncorrect
Question 4 of 10
The governor stops pumping air when it reaches the cut out level, which is normally around __________.CorrectIncorrect
Question 5 of 10
The governor allows air to resume pumping when it reaches the cut-in level, which is normally around __________.CorrectIncorrect
Question 6 of 10
An air tank drain value is used to remove __________.CorrectIncorrect
Question 7 of 10
An alcohol evaporator helps __________.CorrectIncorrect
Question 8 of 10
How often should the air tank be drained?CorrectIncorrect
Question 9 of 10
The safety valve on the air compressor tank is set to open at __________.CorrectIncorrect
Question 10 of 10
If the safety value releases air, which of the following probably happened?CorrectIncorrect