AIR BRAKES CDL PRACTICE TEST - VIRGINIA
11.
By pushing the trailer air supply control knob in, you:
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supply the trailer with air.
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supply the tires with air.
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shut the air off and put on the trailer emergency brakes.
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12.
Weight that is loaded so there is a high center of gravity:
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reduces the chance that the load will shift to the side or fall off.
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makes a vehicle easier to handle.
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causes greater chance of rollover.
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13.
To test the air leakage rate, with a fully-charged air system you should ____________ and time the air pressure drop.
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release the parking brake, leave the engine running
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turn off the engine, release the parking brake
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put alcohol into the air system, run the engine at a fast idle
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14.
Which of the following is NOT part of the drum brake?
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Brake drum
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Axle
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Safety valve
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15.
If your ABS is not working:
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it will slow your truck to a halt and force you to pull over.
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the drive wheels will begin to spin, and you should take your foot off the accelerator.
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you still have normal brake functions, and should drive and brake as you always have.
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