CO 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 Colorado CDL knowledge test. The CO 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 Colorado CDL Manual. Take this CO CDL practice test now to prepare for the actual air brakes test!
1.
The __________ keeps air from going out if the air compressor develops a leak.
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emergency relay valve
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air compressor drive belt
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tractor protection valve
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one-way check valve
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2.
Before leaving your vehicle unattended, you should:
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Chock the wheels.
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Apply the parking brake.
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Remove the keys.
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All of the above.
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3.
To control your speed on a downgrade, you should:
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use controlled braking.
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use engine braking.
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fully apply the brakes.
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coast in neutral.
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4.
When the spring brakes are on, you should push the brake pedal down:
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Only when driving downhill.
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Never.
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Only when driving uphill.
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Only when approaching railroad-highway crossings.
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5.
Empty trucks have the best braking. True or False?
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It depends on the truck.
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It depends on the cargo.
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False.
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True.
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