CDL AIR BRAKES PRACTICE TEST - ILLINOIS
21.
Excessive use of the service brakes results in overheating. Too much heat can:
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cause the brakes to squeak.
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cause the brakes to grab.
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cause the brakes apply unevenly.
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make the brakes stop working.
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22.
If your vehicle is hydroplaning, you should:
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accelerate to get through the water as quickly as possible.
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release the accelerator and push in the clutch.
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use the brakes to slow down.
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None of the above.
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23.
The braking power of the spring brakes:
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is not affected by the air pressure level.
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depends on the brakes being in adjustment.
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is not affected by the condition of the service brakes.
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All of the above.
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24.
ABS brakes help you:
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find an escape route when the service brakes fail.
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downshift before starting down a hill.
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avoid wheel lock up.
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lock up the wheels in an emergency stop.
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25.
The service brake applies and releases:
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the brake in an emergency situation.
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the parking brake when you use the parking brake control.
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the brake when you use the brake pedal during normal driving.
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None of the above.
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