CDL GENERAL KNOWLEDGE TEST (DISTRICT OF COLUMBIA) - PRACTICE TEST
31.
When you park, you should try to park:
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on the shoulder of the road.
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so you'll be able to pull forward when you leave.
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so there is enough room to back out.
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None of the above.
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32.
If your vehicle thumps or vibrates heavily, it may be a sign that:
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the engine belt is loose.
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one of the tires has gone flat.
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you need to shift up.
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the brakes have failed.
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33.
You must have at least 4/32 inch tread depth in every major groove on front tires and at least ___ inch on other tires.
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2/32
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1/32
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4/32
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3/32
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34.
When backing a trailer, turn the wheel right to make the cab go ________ and the trailer go ________.
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right; right
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right; left
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left; right
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left; left
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35.
How can you tell if your vehicle is equipped with ABS?
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Trailers will have yellow ABS malfunction lamps on the left side.
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Look for yellow ABS malfunction lamps on the instrument panel.
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Look under the vehicle for the wheel speed sensor wires coming from the back of the brakes.
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All of the above.
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36.
Which of the following statements about over-the-counter drugs is true?
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They are not considered drugs.
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They may affect safe driving ability.
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They are perfectly safe and legal.
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They can be used while on duty, as long as you drink coffee to stay awake.
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37.
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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causes greater chance of rollover.
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makes a vehicle easier to handle.
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All of the above.
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38.
Which of these is FALSE? The spare tire must:
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be properly inflated.
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be approved by the truck manufacturer.
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be the proper size.
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not be damaged.
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39.
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 seeing it in your mirrors.
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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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40.
Without engine oil:
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exhaust emissions will be reduced.
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traction will be reduced.
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the ABS won't work.
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the engine can be destroyed rapidly.
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