CDL AIR BRAKES PRACTICE TEST - KENTUCKY
21.
If the ABS is not working:
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you still have normal brake functions.
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the vehicle will have weak brakes.
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the vehicle will have no brakes.
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None of the above.
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22.
Your truck has a dual air system. If either system is very low on pressure:
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either the front or the rear brake will not be fully operational.
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the ABS will not work properly.
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the tractor protection valve will not work properly.
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the low pressure warning signal will stop working.
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23.
You are driving on a steep downgrade. If your safe speed is 35 mph, you should apply the brakes when your speed reaches:
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25 mph
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45 mph
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30 mph
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35 mph
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24.
Vehicles with ABS have ______ ABS malfunction lamps on the instrument panel.
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orange
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blue
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green
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yellow
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25.
After supplying air to the trailer brake system, you should check the brake system for crossed air lines by:
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shutting the engine off so you can hear the brakes.
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applying and releasing the trailer brakes and listening for the sound of trailer brakes.
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checking the air brake system pressure gauge for signs of major air loss.
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All of the above.
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