2025 North Dakota Cdl Air Brakes - Test 1
The following questions are from real North Dakota 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 one-way check valve:
Drains the water and compressor oil from the air tanks.
Prevents air from escaping if the air compressor has a leak.
Activates the emergency brakes when there is a leak.
Holds the spring brakes in position until they are used.
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Key Data
Number of Tests: 18
Number of Question: 25
Passing Score: 20
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