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The air brakes endorsement applies to applicants who wish to drive a vehicle with air brakes in Class A, B, or C CDL. To drive a vehicle with air brakes, you must pass the air brake component of the Florida CDL knowledge test. The FL CDL air brakes test consists of 25 questions, and you'll need at least 20 correct answers to pass (80%). The test covers the information found in the air brakes section of the Florida CDL Manual. Take this FL CDL practice test now to prepare for the actual air brakes test!
1.
If your ABS is not working:
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you still have normal brake functions, and should drive and brake as you always have.
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the drive wheels will begin to spin, and you should take your foot off the accelerator.
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it will slow your truck to a halt and force you to pull over.
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you should immediately bring your vehicle to a complete stop.
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2.
As part of your vehicle inspection, you are checking that air flows to all trailers. After using the trailer handbrake to provide air to the service line, you go to the rear of the rig. When you open the emergency line shut-off valve at the rear of the last trailer, you should hear:
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a thumping sound.
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a mechanical vibration.
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air escaping from the open valve.
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the service line valve close.
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3.
Before driving a truck or bus with a dual air brake system, the minimum pressure in both the primary and secondary
systems should be at least:
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100 psi.
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130 psi.
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75 psi.
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50 psi.
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4.
The posted speed limit:
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may only be exceeded when driving in rural areas.
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should only be exceeded when passing other vehicles.
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should never be exceeded.
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is only a suggestion.
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5.
Air brakes use ________ to make the brakes work.
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compressed air
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compressed oil
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compressed gas cylinders
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compressed gases
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