SOUTH CAROLINA CDL AIR BRAKES PRACTICE TEST
6.
The ________ brake system applies and releases the brakes when the driver uses the brake pedal during normal driving.
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anti-lock
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service
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emergency
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parking
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7.
Which of the following is NOT TRUE? When you drive a tractor-trailer combination with ABS, you should:
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drive slower to keep your vehicle in a straight line.
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use only the braking force necessary to stop safely.
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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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8.
You are coming down a long, steep downgrade. Which of the following is a sign that your brakes may have started to fade?
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The steering feels heavy.
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You have to apply your brakes harder and harder to get the same stopping power.
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You hear a loud "bang".
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The brake pedal feels spongy or goes to the floor.
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9.
What should you do to correct a drive-wheel braking skid?
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Fully apply the brakes, turn the steering wheel quickly, push in the clutch, and countersteer.
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Turn in the same direction as the skid.
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Stop braking, turn the steering wheel quickly, push in the clutch, and countersteer.
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None of the above.
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10.
Air pressure should build up in a single air system, within about:
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10 minutes.
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3 minutes.
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15 minutes.
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1 minute.
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