Oklahoma CDL — Air Brakes Practice Test
The Oklahoma 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.
Oklahoma 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
If you keep having to increase application pressure just to hold the same speed, what is that telling you?
- Test 2
25 questions · pass with 20
At about what tank pressure does the governor reach its cut-out point and stop the compressor from pumping?
- Test 3
25 questions · pass with 20
When someone suddenly pulls out in front of you, how should you brake?
- Test 4
25 questions · pass with 20
On newer air brake vehicles, how do you apply the parking brakes?
- Test 5
25 questions · pass with 20
During the engine compartment step of the inspection, what extra air brake item should you check on a belt-driven compressor?
- Test 6
25 questions · pass with 20
While a vehicle is being driven, what holds the powerful springs of the spring brakes back?
- Test 7
25 questions · pass with 20
At roughly what pressure does the governor's cut-in point let the compressor start pumping again?
- Test 8
25 questions · pass with 20
The total stopping distance for an air brake vehicle is made up of which four parts?
- Test 9
25 questions · pass with 20
Compared with the instant action of hydraulic brakes, how long does air take to reach the brakes after the pedal is pushed?
- Test 10
25 questions · pass with 20
On large buses, at what pressure do the low pressure warning devices commonly activate?