2025 Maine Cdl Tank - Test 1
The following questions are from real Maine 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. A driver should test the tractor protection valve by:
Pulling the yellow, diamond-shaped knob.
Releasing air with the brake pedal.
Unlocking the trailer doors.
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Key Data
Number of Tests: 18
Number of Question: 20
Passing Score: 16
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