MONTANA CDL AIR BRAKES PRACTICE TEST
16.
If your vehicle does not have automatic air tank drains, how often should you drain air tanks to remove moisture and oil?
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Once a week.
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At least once a month.
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At the end of each working day.
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Every 4 hours.
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17.
Some vehicles have a separate air tank which can be used to:
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release the spring brakes.
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unload cargo or passengers.
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turn on the 4-way emergency flashers.
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hold the vehicle or combination of vehicles stationary.
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18.
Air tanks must be drained completely to:
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remove all moisture and oil.
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remove all the air.
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put alcohol into the air system.
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pump water and compressor oil into the tanks.
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19.
On front tires, tread should be at least:
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4/32 inch
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2/32 inch
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4/16 inch
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1/16 inch
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20.
The air compressor governor:
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allows the compressor to start pumping air when the tank pressure rises to the "cut-out" pressure.
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controls when the air storage tanks will pump air into the air compressor.
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stops the compressor from pumping air.
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All of the above.
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