AIR BRAKES CDL PRACTICE TEST - WISCONSIN
21.
If your ABS fails:
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you will still have normal brake functions.
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you will have no brake function, and could lose control.
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the first step is to get the vehicle off the road and stop.
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your tires might grab unexpectedly and you could lose control.
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22.
Most heavy-duty vehicles use:
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solid brakes.
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pressure brakes.
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hydraulic brakes.
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air brakes.
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23.
A broken exhaust system:
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can improve fuel efficiency.
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can let poisonous carbon monoxide to leak into the cab.
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does not cause problems.
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poses no threat to the driver.
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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.
At 55 mph, the total stopping distance for vehicles with air brake systems traveling in ideal conditions is:
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less than 250 feet.
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over 250 feet.
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over 450 feet.
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less than 150 feet.
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