CDL AIR BRAKES PRACTICE TEST - LOUISIANA
6.
The air compressor governor controls:
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the speed of the air compressor.
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the air pressure applied to the brakes.
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when air tank pressure falls below the “cut-out” level.
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when the air compressor will pump air into the air storage tanks.
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7.
Emergency brakes are:
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not required on buses.
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required on all vehicles.
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not required on doubles.
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not required on commercial vehicles with air brakes.
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8.
If you must make an emergency stop, you should:
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use the hand brake before the brake pedal.
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brake in a way that will keep your vehicle in a straight line.
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apply the brakes as hard as you can to lock them.
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None of the above.
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9.
When you make a quick lane change, the crack-the-whip effect can:
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improve your traction.
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make it harder to turn without skidding.
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the trailer to swing wide to the left.
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turn the trailer over.
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10.
If the spring brakes do not release when you push the trailer air supply control, you should:
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pump the brakes.
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rev or
lug the engine.
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check the electrical cables.
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check the air line connections.
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