CDL AIR BRAKES PRACTICE TEST - ALABAMA
11.
The heavier the vehicle:
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the higher the center of gravity will be.
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the less work the brakes must do to stop it.
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the more work the brakes must do to stop it.
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None of the above.
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12.
Some vehicles have a separate air tank which can be used to:
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release the spring brakes.
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unload cargo or passengers.
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hold the vehicle or combination of vehicles stationary.
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turn on the 4-way emergency flashers.
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13.
If stopped on a hill, how can you start moving without rolling back?
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Partly engage the clutch before you take your right foot off the brake, put on the parking brake if necessary.
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Release the parking brake before you have applied enough engine power to keep from rolling back.
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Press on the gas pedal, even if you have to roll back a little.
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None of the above.
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14.
With brake drums, if brakes become too hot:
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the brakes will supply too much power to the drive wheels.
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the air compressor will kick on to cool the brakes.
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the brakes may stop working.
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your ABS will malfunction.
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15.
Brake lag is:
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the time required for the air brakes to work after the brake pedal is pushed.
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the distance your vehicle will travel, in ideal conditions, while you are braking.
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the amount of air pressure required to stop the vehicle.
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the distance your vehicle will continue to travel, in ideal conditions, before you hit the brakes.
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