2025 Oklahoma Cdl Class A Knowledge Test - 2
The following questions are from real Oklahoma 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. If a truck is equipped, a trailer brake hand valve can be used to:
Add fuel to the truck.
Prevent the truck from rolling back when being started from a stop.
Check the engine oil level.
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Key Data
Number of Tests: 18
Number of Question: 50
Passing Score: 40
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