ME CDL AIR BRAKES PRACTICE TEST
21.
You should drain your air tanks:
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at the beginning of each trip.
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at the end of each working day.
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every month.
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22.
Before transporting sealed loads, you should check that:
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the load is properly secured.
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the load can be inspected.
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the seal numbers match the placard numbers.
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23.
If your trailer starts to skid, you should:
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use the trailer hand brake (if you have one) to straighten out the rig.
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release the brakes to get traction back.
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keep the rear of your vehicle close to the curb.
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24.
The safety valve is usually set to open at:
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150 psi
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200 psi
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125 psi
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25.
Radial and bias-ply tires:
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should be used together.
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should be used together only when driving in packed snow.
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should not be used together.
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