AIR BRAKES CDL PRACTICE TEST - LOUISIANA
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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!
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1.
When using a fire extinguisher, you should stay:
at whatever distance you think is safe.
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as close to the fire as possible, without getting burnt.
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as far away from the fire as possible.
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at least 10 feet away from the fire.
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2.
Banked curves:
are reserved for pedestrians.
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can be taken at any speed.
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have a safe "design speed".
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should always be avoided.
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3.
The safety relief valve is usually set to open at ____ psi.
75
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50
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100
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150
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4.
You should NOT use the parking brakes if:
the brakes are too dry.
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the brakes are very hot.
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the brakes are cold.
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All of the above.
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5.
Typically an air system is fully-charged at:
25 psi
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125 psi
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75 psi
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250 psi
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6.
The s-cam forces the brake shoes away from one another and presses them against the inside of the brake drum. It is called the s-cam because:
it is a safe-driving brake.
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"S" stands for "Shoes".
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it applies a "Shock" to the brakes.
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it is shaped like the letter "S".
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7.
You should drain the air tanks completely. If water and oil collect in the air tanks:
your brakes could become hard to press.
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your brakes could heat up.
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your brakes could fail.
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None of the above.
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8.
The Johnson bar is a valve that:
reduces the braking pressure to a safe level.
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is installed in the first tank the air compressor pumps air to.
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works the trailer brakes.
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keeps air from going out if the air compressor develops a leak.
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9.
With the air pressure built up to governor cutoff, the maximum leakage rates per minute are ___ psi for single vehicles and ___ psi for a combination of 2 vehicles.
3; 2
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5; 6
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3; 4
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4; 5
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10.
Emergency brakes must be held on by:
mechanical force.
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air pressure.
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hydraulic pressure.
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dynamic pressure.
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LA Air Brakes Test
Number of questions: | 25 |
Correct answers to pass: | 20 |
Passing score: | 80% |
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