AIR BRAKES PRACTICE TEST - ALABAMA
11.
If a vehicle is equipped with ABS, when you start the engine:
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the trailer emergency brakes will come on.
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the spring brakes will come on.
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the ABS indicator light on the dash should come on and then turn off.
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the wheels will lock up.
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12.
When parking a trailer without spring brakes, it is very important for safety that you use wheel chocks. Why?
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The air could leak out of the trailer air tank, releasing its emergency brakes.
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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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None of the above.
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13.
The air compressor stops pumping air into the air storage tanks when air tank pressure rises to around:
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125 psi.
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450 psi.
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250 psi.
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100 psi.
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14.
With a dual air brake system:
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one system is the main braking system while the other is a back-up system.
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each system shares the same lines and hoses.
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each system shares air tanks.
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each system has its own air tanks, hoses and lines.
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15.
You should drain the air tanks completely. If water and oil collect in the air tanks:
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your brakes could become hard to press.
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your brakes could fail.
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your brakes could heat up.
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None of the above.
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