LA CDL AIR BRAKES PRACTICE TEST
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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 Louisiana CDL knowledge test. The LA 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 Louisiana CDL Manual. Take this LA CDL practice test now to prepare for the actual air brakes test!
1.
To check slack adjusters on S-cam brakes, you should:
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use gloves and pull hard on each slack adjuster you can reach.
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press the brake pedal and listen for any strange noises.
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check that the spring brakes come on automatically.
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All of the above.
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2.
The safety valve installed in the first tank the air compressor pumps air is set to open:
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every 15 minutes.
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if there is too much pressure.
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if there is too little pressure.
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at 30 psi.
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3.
When should you be particularly careful about high winds?
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When driving in winter
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When going downhill
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When driving at night
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When emerging from a tunnel
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4.
To operate a vehicle equipped with air brakes, you must pass the air brakes knowledge test. Why?
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If you don't pass the air brakes test, you can't get a CDL.
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All trucks have air brakes.
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If you don't, you will only receive a CDL permit.
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If you don't pass the air brakes test, you will be restricted to driving vehicles without air brakes.
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5.
You are coming down a long, steep downgrade. Which of the following is a sign that your brakes may have started to fade?
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The steering feels heavy.
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The brake pedal feels spongy or goes to the floor.
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You have to apply your brakes harder and harder to get the same stopping power.
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You hear a loud "bang".
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