Kansas CDL — Air Brakes Practice Test
The Kansas 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.
Kansas 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
During your final air brake check, the gauge climbs past 125 psi and keeps rising until air starts blowing off at the first tank at around 150 psi. What does this point to?
- Test 2
25 questions · pass with 20
Only your tractor has ABS. During a hard stop, you see in the mirror that the trailer is starting to swing out. What should you do?
- Test 3
25 questions · pass with 20
Why does the manual tell you to check brake adjustment often, rather than only at the pre-trip inspection?
- Test 4
25 questions · pass with 20
During the final air brake check, how does the manual have you confirm that the parking brake will actually hold the vehicle?
- Test 5
25 questions · pass with 20
You're driving a truck built before 1975 that has a front brake limiting valve control in the cab. The roads are icy this morning. Where should you set the control?
- Test 6
25 questions · pass with 20
Partway down a long grade, your application pressure gauge shows you need more and more pressure on the brakes just to hold the same speed. What should you do?
- Test 7
25 questions · pass with 20
Automatic slack adjusters adjust themselves. When does that self-adjustment take place?
- Test 8
25 questions · pass with 20
During the final air brake check, how does the manual have you confirm that the parking brake will actually hold the vehicle?
- Test 9
25 questions · pass with 20
Your straight truck's air system is fully charged at about 125 psi. For the first leakage check, you turn off the engine, push in the parking brake knob, and simply time the pressure drop. What loss rate is acceptable?
- Test 10
25 questions · pass with 20
A bus is fitted with dual parking control valves. Which of the two do you use to set the spring brakes when you park?