2025 Pennsylvania Cdl Combination - Test 2
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. A loss of air pressure in the emergency line will cause:
The suspension springs to extend.
The tractor protection valve to open.
The rear trailer to detach from the combination.
The emergency brakes to activate.
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Key Data
Number of Tests: 18
Number of Question: 20
Passing Score: 16
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