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General Knowledge Practice Test

The questions on this CDL general knowledge practice exam will test your understanding of commercial truck driving rules and regulations. Take this CDL Class-A practice test as many times as you want, and go for a perfect score! If you think you might want to take classes, check out our partner schools.

Study materials: CDL Manual - CDL Pre Trip Inspection Checklist

Question 1 of 52

Which of the following is the most important reason for doing a pre-trip inspection?