2025 Iowa Cdl Class B Knowledge Test - 1
The following questions are from real Iowa 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. Do not base your decision to shift gears on:
The speed of your engine (rpm).
The speed of the road (mph).
The actions of the vehicle next to you.
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Key Data
Number of Tests: 18
Number of Question: 50
Passing Score: 40
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