DISTRICT OF COLUMBIA CDL PRACTICE TEST - GENERAL KNOWLEDGE
21.
Activities inside the vehicle that can distract your attention include:
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picking up something that fell.
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talking to passengers.
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adjusting the radio.
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All of the above.
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22.
If your drive wheels begin to spin, you should:
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pump the brake pedal three times.
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use the parking brake.
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take your foot off the accelerator.
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use the Anti-lock Braking System.
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23.
If your vehicle is hydroplaning, you should:
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release the accelerator and push in the clutch.
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use the brakes to slow down.
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accelerate to get through the water as quickly as possible.
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None of the above.
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24.
When checking the steering system during your pre-trip inspection you should look for:
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mismatched lock rings.
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steering wheel play of more than 10 degrees.
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cracked drums.
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shoes or pads with oil or grease on them.
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25.
Dry bulk tanks require special care because:
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they have a low center of gravity.
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they have a high center of gravity.
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take up more space than other CMVs.
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are heavier than other CMVs.
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26.
In vehicles with air brakes, the air compressor governor:
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controls how much air the air compressor will pump into the air storage tanks.
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controls when the air storage tanks will pump air into the air compressor.
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controls when the air compressor will pump air into the air storage tanks.
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None of the above.
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27.
When driving on wet roads, you should reduce your speed by about:
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one-half.
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one-quarter.
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one-fifth.
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one-third.
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28.
You should downshift in advance before:
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crossing a bridge.
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starting down a hill or entering a curve.
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entering a tunnel.
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entering the highway.
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29.
Brake fade results from:
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excessive heat caused by using brakes too much.
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using brakes in cold weather.
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wet brakes.
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All of the above.
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30.
A steering wheel play of more than ___ degrees can make it hard to steer.
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60
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45
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10
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20
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