2025 District of Columbia Cdl Combination - Test 2
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. The trailer hand valve should:
Be used for parking.
Be used only to test the trailer brakes.
Be used together with the brake pedal.
Be used on slippery surfaces.
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Key Data
Number of Tests: 18
Number of Question: 20
Passing Score: 16
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