AIR BRAKES CDL PRACTICE TEST - SOUTH CAROLINA
16.
An anti-lock braking system (ABS):
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helps you avoid skids caused by over braking.
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should help you steer around an obstacle while braking.
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helps you avoid wheel lock up.
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All of the above.
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17.
When parking a trailer without spring brakes, it is very important for safety that you use wheel chocks. Why?
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You may not notice a major leak in the service line until you try to put the brakes on.
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if you don't use wheel chocks, supply air will be sent to the service line instead of going to charge the trailer air tanks.
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The air could leak out of the trailer air tank, releasing its emergency brakes.
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None of the above.
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18.
Which of the following is not part of the air brake system?
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Air compressor
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Air filter
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Alcohol evaporator
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Air storage tanks
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19.
If you perform the skills test in a vehicle that is not equipped with air brakes:
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you will be required to operate vehicles with air brakes.
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you will be required to take the tank vehicle test.
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you will be required to operate a CMV without hydraulic brakes.
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you will be restricted from operating vehicles with air brakes.
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20.
You are driving a vehicle with air brakes when the low air pressure warning light and buzzer come on. You should:
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activate your hazard lights and drive to the nearest place where you can stop.
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pull off the road and stop immediately.
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slow down and test your brakes.
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apply the brakes as hard as you can.
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