DELAWARE CDL AIR BRAKES PRACTICE TEST
21.
In air brake vehicles, the parking brake should be used:
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to hold your speed while going downhill.
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when the spring brakes are on.
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as little as possible.
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any time you park (with a few exceptions).
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22.
When a tire fails, you must:
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hold the steering wheel firmly.
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stay off the brake.
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get out and check all the tires after you have come to a stop.
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All of the above.
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23.
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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24.
You should always try to back toward the driver's side because:
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you can more easily correct any steering errors.
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you can watch the rear of your vehicle out the side window.
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backing toward the left side is more dangerous.
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None of the above.
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25.
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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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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use only the braking force necessary to stop safely.
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drive slower to keep your vehicle in a straight line.
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