AIR BRAKES CDL PRACTICE TEST - LOUISIANA
16.
Most heavy duty vehicles use ___ air brake systems for safety.
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triple
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reduced
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single
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dual
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17.
In a vehicle with a dual air brake system:
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one system supplies air to the trailer.
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both systems typically operate the regular brakes on the rear axle.
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each system has its own air tanks.
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All of the above.
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18.
The best way to recognize that your trailer has started to skid is:
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by recognizing tire failure.
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by opening the window and feeling the front of the mirror.
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by feeling the brakes come on.
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by seeing it in your mirrors.
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19.
When driving in hot weather, drivers should inspect tires:
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every hour or every 50 miles.
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every 4 hours or every 200 miles.
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every 3 hours or every 75 miles.
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every 2 hours or every 100 miles.
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20.
When you apply the brakes, the brake shoes and linings are pushed against:
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the safety relief valve.
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the S-cam.
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the supply pressure gauge.
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None of the above.
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