AIR BRAKES CDL PRACTICE TEST - DISTRICT OF COLUMBIA
11.
The best way to know what's going on behind and to the sides of your vehicle is to:
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ask your passenger(s).
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check your mirrors regularly.
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lean out of the window.
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use the rear view camera.
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12.
If you are feeling sleepy, you should:
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pull off the road and rest.
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get some coffee.
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slow down.
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drive faster.
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13.
Most heavy vehicles require ________ change gears.
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triple shifting
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double shifting
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double clutching
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single clutching
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14.
Your vehicle has air brakes. To stop, you should:
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pump the brake pedal 3 times.
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release the accelerator, push in the clutch, and shift to Neutral at the same time.
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push the brake pedal down.
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pull the parking brake control knob out.
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15.
When parking a trailer without spring brakes, it is very important for safety that you use wheel chocks. Why?
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if you don't use wheel chocks, supply air will be sent to the service line instead of going to charge the trailer air tanks.
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The air could leak out of the trailer air tank, releasing its emergency brakes.
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You may not notice a major leak in the service line until you try to put the brakes on.
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None of the above.
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