Florida CDL — Air Brakes Practice Test
The Florida CDL — Air Brakes knowledge test has ~25 questions; you need ~20 correct (80%) to pass.
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25 questions · pass with 20 correct. You get instant feedback and an explanation after every answer.
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Florida 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
What information does the supply pressure gauge on the dash give you?
- Test 2
25 questions · pass with 20
You are about to park for the night in freezing weather, and your brakes are soaking wet from slush. What does the handbook suggest doing first?
- Test 3
25 questions · pass with 20
Unlike hydraulic brakes, air brakes have a built-in delay because air must travel through the lines. About how long is that brake lag?
- Test 4
25 questions · pass with 20
In an emergency stop, 'controlled braking' means:
- Test 5
25 questions · pass with 20
Why must air storage tanks be drained regularly if they only have manual drain valves?
- Test 6
25 questions · pass with 20
A driver who skips or fails the air brakes knowledge test can still earn a CDL, but it will:
- Test 7
25 questions · pass with 20
Some air brake systems include an alcohol evaporator. What job does it do?
- Test 8
25 questions · pass with 20
Unlike hydraulic brakes, air brakes have a built-in delay because air must travel through the lines. About how long is that brake lag?
- Test 9
25 questions · pass with 20
Any time you park a vehicle that has air brakes, the rule is to:
- Test 10
25 questions · pass with 20
While inspecting a manual slack adjuster on an s-cam brake, you pull hard on it with the wheels chocked and parking brakes released. When does it need adjustment?