2025 Pennsylvania Cdl Combination - Test 1
The following questions are from real Pennsylvania 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. What does the trailer air supply control look like?
It is a square blue knob.
It is a triangular yellow knob.
It is an eight-sided red knob.
It is a circular orange knob.
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Key Data
Number of Tests: 18
Number of Question: 20
Passing Score: 16
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