CDL AIR BRAKES PRACTICE TEST - WYOMING
16.
If the air pressure gets too low:
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the brakes will not work.
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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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17.
If you must stop on a one-way or divided highway, you should place warning devices _______ toward the approaching traffic.
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5, 25 and 50 feet
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5, 50 and 500 feet
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10, 100 and 200 feet
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3, 15 and 45 feet
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18.
Hydroplaning is more likely if:
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tire tread is worn.
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the road is wet.
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tire pressure is low.
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All of the above.
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19.
To check the slack adjusters:
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Park on level ground and chock the wheels, release the parking brakes and pull hard on each slack adjuster. The slack adjuster shouldn't move more than one inch.
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check the air hoses connected to the brake chambers to make sure they aren't cut or worn.
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park downhill and see if the vehicle rolls.
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None of the above.
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20.
Which of the following is NOT TRUE? When you drive a tractor-trailer combination with ABS, you should:
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brake the same way, regardless of whether you have ABS on the tractor, the trailer, or both.
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use only the braking force necessary to stop safely.
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monitor your tractor and trailer as you slow down, and if it is safe to do so, back off the brakes to stay in control.
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drive slower to keep your vehicle in a straight line.
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