GA CDL AIR BRAKES PRACTICE TEST
11.
It is not safe to drive a vehicle that has brake drums with cracks that are longer than ___ the width of the friction area.
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1/2
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3/5
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9/10
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1/4
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12.
On
a tractor-trailer equipped with a trailer brake hand
valve, the hand valve can be used to:
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reduce the chance of the front wheels skidding.
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hold compressed air.
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prevent movement of cargo.
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keep from rolling back.
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13.
Air pressure should build up in a single air system, within about:
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1 minute.
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3 minutes.
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10 minutes.
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15 minutes.
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14.
Your vehicle is equipped with an antilock braking system:
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if the vehicle was manufactured after 2012.
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if the vehicle was manufactured after 1998.
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if the vehicle was manufactured after 2000.
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None of the above.
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15.
If air doesn't flow all the way to the back:
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your lower fifth wheel may fall off.
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your brakes will not work properly.
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the trailer will tend to swing around.
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a rollover is more likely.
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