Michigan General Knowledge CDL Practice Test
Below are 25 exam-style questions for the Michigan General Knowledge CDL knowledge test, modeled on the FMCSA-aligned content used by the Michigan Department of State. Try to answer each question on your own before reading the answer key directly under it. The questions and answer choices are shuffled deterministically per state and endorsement, so the order will stay the same on repeat visits — that lets you genuinely measure your improvement.
- A Move to the right lane
- B Honk and accelerate
- C Maintain speed
- D Cover the brake and slow down
- A Brake-lag distance only
- B Speed times weight
- C Perception distance + reaction distance + brake-lag distance + braking distance
- D Reaction distance only
- A The fuel tank area
- B A federal speed restriction
- C The area in front of the steer axle
- D The area immediately next to it where other drivers are hidden in your blind spots
- A Tractor-trailers under 26,001 lbs GCWR
- B Any vehicle over 26,001 lbs
- C Vehicles designed to carry 16+ passengers including the driver, or that require hazmat placards
- D Class A combinations only
- A It prevents wheel lockup so the driver can keep steering
- B It always stops the vehicle in a shorter distance
- C It increases brake pressure automatically
- D It applies the parking brake
- A It is illegal
- B It increases fuel use
- C It causes the engine to overheat
- D It can let poisonous carbon monoxide into the cab
- A A type of cargo strap
- B A low-air pressure warning device that drops a flag in front of the driver
- C A trailer hitch component
- D A fuel-saving switch
- A A spotter walking 1,000 ft up the road
- B A flare burning constantly
- C Three reflective triangles: 10 ft, 100 ft, and 200 ft toward approaching traffic
- D One reflective triangle within 10 feet
- A Considered driving under the influence for CDL purposes
- B Allowed off-duty only
- C Allowed if the driver feels fine
- D A traffic violation, but not a CDL disqualification
- A Tying a load down once at the start is enough
- B You must inspect cargo and securement before driving and within the first 50 miles
- C Federal rules do not apply to cargo securement
- D Cargo is the shipper's responsibility, not yours
- A 7 days
- B 1 hour
- C A reasonable time, before going off duty
- D 24 hours
- A Test the parking brake then the service brake
- B Test only the air-leak rate
- C Test the low-air warning then drive
- D Test the service brake then the parking brake
- A The cargo is not properly secured or placarded
- B It would push your weight over legal limits
- C All of the above
- D It would make you exceed federal hours-of-service rules
- A Locking the wheels
- B Coasting in neutral
- C Pumping the brakes hard and fast
- D Applying the brakes as hard as possible without locking the wheels
- A Triples
- B Quadruples
- C Doubles
- D Stays the same
- A Engine oil level is safe to operate
- B Power steering fluid is at the proper level
- C All of the above
- D Coolant level is above LOW and the cap is secure
- A 10 seconds
- B 1 second
- C 4 seconds
- D 6 seconds
- A Use low-beam headlights and slow down
- B Use high-beam headlights for maximum visibility
- C Use the four-ways while in motion at highway speed
- D Drive faster to get out of the fog quickly
- A Shift into reverse
- B Look for an escape ramp
- C Coast in neutral
- D Use the parking brake hard
- A 11 hours
- B 10 hours
- C 14 hours
- D 16 hours
- A Increase your following distance from the vehicle in front to give both of you more room
- B Brake suddenly to teach a lesson
- C Move to the left lane only
- D Speed up to get away
- A Properly working brakes
- B Old tires
- C Manual transmissions
- D Driving too fast for conditions
- A Slow down
- B Increase following distance
- C All of the above
- D Make smooth steering and braking inputs
- A High beams improve visibility in heavy rain
- B It is safe to drive at the posted speed limit
- C Tire chains are required by federal law
- D Roads are most slippery just after rain begins, when water mixes with road oil
- A Brake immediately and pull off the road
- B Shift to neutral and coast
- C Hold the steering wheel firmly, ease off the accelerator, and let the vehicle slow down
- D Steer sharply toward the shoulder
Study tips for the Michigan General Knowledge exam
The General Knowledge portion of the Michigan CDL exam is graded out of the bank of questions the Michigan Department of State draws from each year. While the exact bank is not published, every question is sourced from the General Knowledge chapter of the Michigan CDL handbook, which itself is derived from the FMCSA Model Commercial Driver's License Manual. That means studying our practice tests, reading the corresponding handbook chapter, and re-reading the parts you got wrong is genuinely the most efficient route to a first-time pass.
Most successful applicants follow a simple cycle: take the practice test cold, write down every question you missed, open the matching chapter of the official Michigan handbook, re-read the section that contains the right answer, then re-take the practice test 24 to 48 hours later. The 24-hour delay matters — sleep is when your brain commits new information to long-term memory, and CDL knowledge questions reward that kind of consolidated learning rather than cramming.
Pay particular attention to questions that include qualifier words like always, never, only, primary, or most. CDL test writers love to flip the right answer with a single qualifier. When two answer choices look almost identical, pay attention to the verb (is it must, should, or may?) and to any numbers (14 days, 100 air miles, 8 hours, 70/8 split). On endorsement tests in particular, watch for trick framing where a true statement about a different endorsement is offered as the "correct" answer to a question that is actually about General Knowledge.
Test-day logistics matter too. Bring photo ID, your Social Security card or birth certificate, your medical examiner's certificate (DOT card), and proof of state residency if you haven't already submitted those documents. The Michigan Department of State will not let you sit for the knowledge exam without your documentation, and most offices charge an additional fee for re-attempts. Arrive early — the wait at most CDL testing offices runs 30 to 60 minutes — and silence your phone before the exam begins.
Finally, keep your General Knowledge fundamentals sharp even when you're focused on the General Knowledge exam. Many states administer multiple knowledge tests in a single sitting, and questions on weight definitions (GVWR, GCWR, GAWR), stopping distance, and the pre-trip inspection routine show up across endorsements. If you're unsure on the basics, sit a fresh Michigan General Knowledge practice test before scheduling the real exam.
Next steps
Missed more than four questions? Re-read the General Knowledge study guide and the matching chapter in the official Michigan CDL handbook. Then come back and re-take the test. Once you can score 22 of 25 or higher on three runs in a row, you're in good shape to schedule the real exam at your local Michigan Department of State office.
Already comfortable with this endorsement? Drill another: MI Air Brakes · MI Combination Vehicles · MI Hazardous Materials · MI Passenger · MI School Bus · MI Tank Vehicle · MI Doubles / Triples
New to the CDL process in Michigan? Read How to apply for a CDL in Michigan for the document checklist and step-by-step timeline.