WI CDL AIR BRAKES PRACTICE TEST
16.
Before driving a truck or bus with a dual air brake system, the minimum pressure in both the primary and secondary
systems should be at least:
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75 psi.
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130 psi.
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50 psi.
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100 psi.
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17.
Before transporting sealed loads, you should check that:
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the load can be inspected.
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the load is properly secured.
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the seal numbers match the placard numbers.
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All of the above.
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18.
After a tire has been changed, the driver should stop a short while later to:
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check tread separation.
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deflate the tire to 10 psi.
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decrease tire pressure.
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check the tightness of the nuts.
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19.
You should drain the air tanks completely. If water and oil collect in the air tanks:
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your brakes could heat up.
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your brakes could become hard to press.
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your brakes could fail.
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None of the above.
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20.
If your vehicle catches fire, you should pull over:
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in an open area.
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near trees.
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at a service station.
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near other vehicles.
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