NORTH CAROLINA CDL AIR BRAKES PRACTICE TEST
16.
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 brake pedal feels spongy or goes to the floor.
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You hear a loud "bang".
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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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17.
Spring brakes are usually held back by:
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the brake pedal.
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modulating control valves.
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the antilock braking system.
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air pressure.
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18.
ABS helps you:
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avoid wheel lock up and maintain control of your vehicle when you brake.
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increase your normal braking capability.
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stop much faster.
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steer gently and smoothly while you are braking.
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19.
The best way to recognize that your trailer has started to skid is:
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by feeling the brakes come on.
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by recognizing tire failure.
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by opening the window and feeling the front of the mirror.
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by seeing it in your mirrors.
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20.
After starting the engine, oil pressure should rise to a normal level:
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within 3 miles.
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within 6 minutes.
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within 2 minutes.
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within seconds.
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