CDL AIR BRAKES PRACTICE TEST - COLORADO
11.
ABS malfunction lamps are located:
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under the hood.
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on the instrument panel.
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on the driver'door.
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None of the above.
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12.
The Johnson bar is a valve that:
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is installed in the first tank the air compressor pumps air to.
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reduces the braking pressure to a safe level.
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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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13.
When driving at night, you should:
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put your own high beams on if other drivers don't put their low beams on.
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look directly at the lights of oncoming vehicles.
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use dark lenses if possible.
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drive slowly enough to see obstacles with your headlights.
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14.
If the air pressure gets too low:
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ABS will help maintain vehicle control.
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you should set the parking brake.
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the brakes will lock up.
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the brakes will not work.
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15.
What is an important thing to remember about emergency braking?
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The more heavily loaded semitrailer trailer should be in the rear.
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You should never use stab braking.
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Your natural response (hitting the brakes) is never the right solution.
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Pushing down on the brake pedal as hard as you can will only keep the wheels locked up and cause a skid.
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