2025 Illinois Cdl Air Brakes - Test 2
The following questions are from real Illinois 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 dual air brake system:
Has a single air brake system, but uses two sets of controls.
Has one air brake system for each side of the truck.
Has two brakes for each wheel.
Has two separate air brake systems, but uses a single set of controls.
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Key Data
Number of Tests: 18
Number of Question: 25
Passing Score: 20
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