Free CDL: Commercial Drivers Licence Exam Questions and Answers
Commercial Drivers Licence is one of the Test Prep tests covered here, sat under the code CDL. These are standardised tests from different organisations rather than one programme — the Praxis series for US teacher licensure is awarded by ETS, and admissions and licensure tests alongside it come from other bodies entirely, each with its own format and scoring.
The first 10 questions on this page are free to read, answers included — no account and no card. A plan opens the rest of the bank, the full timed practice test and your weak-topic reporting.
Last updated: August 29, 2026
- Exam code
- CDL
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- Questions in our bank
- 1000+
- Free to read
- First 10, with answers
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- 130 mins · 70%
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Recommended: Switch to Test Mode to start a practice test that simulates the real exam experience.
Question #1
What is the maximum blood alcohol concentration (BAC) allowed for a commercial driver?
Please select an optionIncorrectCorrect answer: A
Commercial drivers must have a BAC of 0.04% or lower while operating a vehicle.
Was this answer correct?Question #2
When must a driver conduct a pre-trip inspection?
Please select an optionIncorrectCorrect answer: D
Pre-trip inspections should be conducted before every trip to ensure vehicle safety and compliance.
Was this answer correct?Question #3
How should you respond if you encounter a section of road under construction?
Please select an optionIncorrectCorrect answer: C
Drivers should slow down and proceed with caution in construction zones for their safety and the safety of workers.
Was this answer correct?Question #4
What is the purpose of the Commercial Driver's License (CDL) program?
Please select an optionIncorrectCorrect answer: C
The CDL program regulates commercial driving to ensure that drivers meet necessary standards for safety.
Was this answer correct?Question #5
Which of these actions is illegal for commercial drivers?
Please select an optionIncorrectCorrect answer: A
Adjusting the stereo could lead to distracted driving, which is illegal for commercial drivers.
Was this answer correct?Question #6
What should a driver do if their vehicle breaks down on the road?
Please select an optionIncorrectCorrect answer: B
Drivers must set warning signals and park safely to alert other vehicles of a breakdown.
Was this answer correct?Question #7
At what distance should you signal before turning or changing lanes?
Please select an optionIncorrectCorrect answer: D
Drivers should signal their intent to turn or change lanes at least 200 feet in advance to allow other drivers to react.
Was this answer correct?Question #8
When should you use low-beam headlights?
Please select an optionIncorrectCorrect answer: D
Low-beam headlights are recommended in foggy conditions to enhance visibility without reflecting light back.
Was this answer correct?Question #9
What is the first step you should take in the event of an accident?
Please select an optionIncorrectCorrect answer: A
The first priority after an accident is to check for injuries and ensure safety before taking further actions.
Was this answer correct?Question #10
How often should you check your mirrors while driving?
Please select an optionIncorrectCorrect answer: B
Drivers should check their mirrors every 5 to 8 seconds to remain aware of their surroundings.
Was this answer correct?
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FAQ
- Q1: What is the CDL: Commercial Drivers Licence exam?
- A: CDL: Commercial Drivers Licence is a Test Prep certification exam. Judging by the questions in our bank, it concentrates on driver, vehicle, commercial, driving and road.
- Q2: What topics does the CDL: Commercial Drivers Licence exam cover?
- A: Questions in our CDL: Commercial Drivers Licence bank cluster around driver, vehicle, commercial, driving, road, brake, tire and transport. Working through the full set is the quickest way to find which of these you are weakest on.
- Q3: How should I prepare for CDL: Commercial Drivers Licence?
- A: Work through the CDL: Commercial Drivers Licence practice questions here, checking your answer on each one, then sit the practice test to rehearse the exam under timed conditions before the real thing.
- Q4: Are these real CDL: Commercial Drivers Licence exam questions?
- A: They are drawn from officially released past questions and from community members who have sat CDL: Commercial Drivers Licence. Answers are verified and updated weekly.
- Q5: Where do I register for the CDL: Commercial Drivers Licence exam?
- A: Register through Test Prep directly. Exampractice is not affiliated with Test Prep and does not administer the exam.
- Q6: Is there a free CDL: Commercial Drivers Licence sample?
- A: Yes. Every CDL: Commercial Drivers Licence page shows a free sample of real questions. Upgrading opens the full bank and the practice test.