AIR BRAKES PRACTICE TEST - COLORADO
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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!
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1.
A dual air brake system:
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has two separate air brake systems, which use two separate sets of brake controls.
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has a single air brake system, which uses a single set of brake controls.
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has a single air brake system, which uses two separate sets of brake controls.
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has two separate air brake systems, which use a single set of brake controls.
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2.
If your vehicle has an alcohol evaporator, every day during cold weather, you should:
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fill it up with oil to prevent the pipes from freezing.
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check the alcohol container and fill up as necessary.
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ensure that compressed air usually has some water and some compressor oil in it.
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fill it up with oil to prevent alcohol from freezing.
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3.
With air brake vehicles, you should use the parking brakes:
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whenever you leave the vehicle unattended.
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only if your vehicle is equipped with ABS.
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as little as possible.
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only during the vehicle inspection test.
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4.
If you get stuck on the railroad tracks, the first thing you should do is:
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stay in your vehicle and call 911.
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try to move your vehicle until you see the train.
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immediately get out of the cab and move away from the tracks.
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scream for help.
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5.
When you push the brake pedal down, air brakes work:
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after about 15 seconds.
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immediately.
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only when ABS is working.
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after a short delay.
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6.
Hydroplaning is more likely if:
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tire tread is worn.
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the road is wet.
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tire pressure is low.
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All of the above.
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7.
Which of the following is NOT a warning sign of fatigue?
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Heavy eyelids
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Trouble remembering the last few miles driven
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Driving at the speed of the traffic
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Frequent blinking
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8.
With a dual air brake system:
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each system shares air tanks.
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one system is the main braking system while the other is a back-up system.
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each system shares the same lines and hoses.
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each system has its own air tanks, hoses and lines.
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9.
Slack adjusters:
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regulate the distance that the air brake has to travel to apply friction to the wheel.
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should move more than one inch where the push rods attach to them.
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are available in four types: manual, automatic, robotic and analog.
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regulate the distance between the rear wheels.
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10.
Typically an air system is fully-charged at:
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250 psi
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25 psi
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125 psi
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75 psi
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CO Air Brakes CDL Test
| Number of questions: | 25 |
| Correct answers to pass: | 20 |
| Passing score: | 80% |
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