AIR BRAKES CDL PRACTICE TEST - UTAH
11.
When the spring brakes are on, you should:
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press the accelerator.
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not push the brake pedal down.
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pump the brakes.
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exceed the posted speed limit.
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12.
You should drain the air tanks completely. If water and oil collect in the air tanks:
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your brakes could fail.
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your brakes could become hard to press.
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your brakes could heat up.
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None of the above.
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13.
With the air pressure built up to governor cutoff, the maximum leakage rates per minute after the initial pressure drop are:
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4 psi for single vehicles and 2 psi for a combination of 2 vehicles.
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1 psi for single vehicles and 2 psi for a combination of 2 vehicles.
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5 psi for single vehicles and 6 psi for a combination of 2 vehicles.
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3 psi for single vehicles and 4 psi for a combination of 2 vehicles.
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14.
To brake in a way that will keep your vehicle in a straight line and allow you to turn if it becomes necessary, you can use:
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the "controlled braking" method.
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the "controlled braking" method or the "stab braking" method.
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the "stab braking" method.
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None of the above.
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15.
If your vehicle has dual parking control valves, you can use pressure from a separate tank to:
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balance the service brakes while you are parked.
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park better.
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release the spring brakes so you can move the vehicle in an emergency.
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None of the above.
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