COLORADO 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.
_________ must have a low air pressure warning signal.
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Vehicles with air brakes built after 2010
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Vehicles with air brakes built after 2005
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All vehicles with air brakes
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Only vehicles with air brakes built before 2015
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2.
The low pressure warning signal will generally activate when the air pressure falls between:
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85–100 psi.
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55–75 psi.
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80–85 psi.
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30–35 psi.
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3.
If you must stop on a one-way or divided highway, you should place warning devices _______ toward the approaching traffic.
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10, 100 and 200 feet
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5, 50 and 500 feet
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5, 25 and 50 feet
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3, 15 and 45 feet
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4.
Front brake limiting valves were used to:
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reduce the chance of the front wheels skidding on slippery surfaces.
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reduce your speed so further braking or shifting is not required.
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reduce exhaust emissions.
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prevent overheating of the front tires.
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5.
How many reflective triangles/emergency reflectors should you carry?
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4
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1
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2
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3
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