2025 District of Columbia Cdl Combination - Test 1
The following questions are from real District of Columbia CDL practice tests. After selecting the answer, you can see the explanation. After confirming, click "Next" to jump to the next question.
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1. Failure to keep the fifth wheel plate properly greased could:
Cause the trailer to disconnect.
Cause steering problems.
Cause braking problems.
Affect the lights.
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Key Data
Number of Tests: 18
Number of Question: 20
Passing Score: 16
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