Florida Commercial Driver License (CDL) 2026 General Knowledge Exam.

The Reality Check: The General Knowledge test is the first hurdle. It consists of 50 questions, and you must get at least 40 correct (80%) to pass. A huge percentage of applicants fail because they rely on outdated online tests that don't cover recent changes.

DMVTestMaster Advantage: We have included questions on the newly expanded "Move Over" law and other Florida-specific regulations to give you the edge.

🐊 SECTION 1: CRITICAL FLORIDA LAWS & 2026 UPDATES
Q1. As of early 2026, in what language must all Florida driver's license examinations, including CDL knowledge and skills tests, be administered?

A: exclusively in English. Why: Effective February 6, 2026, the FLHSMV announced that interpreters and translation services are no longer permitted for any driver's license tests.

Q2. You are driving on a multi-lane highway and approach a disabled passenger vehicle on the shoulder with its hazard lights flashing. Under Florida's expanded "Move Over" law, what must you do?

A: Move over a lane away from the vehicle if safe to do so, or slow down to a speed that is 20 mph less than the posted limit. Why: The law was expanded to protect all vehicles stopped on the roadside displaying warning lights, not just emergency or utility vehicles.

Q3. What is the legal Blood Alcohol Concentration (BAC) limit for operating a commercial motor vehicle (CMV) in Florida?

A: 0.04%. Why: This is half the legal limit for a passenger car driver (0.08%). Commercial drivers are held to a higher standard of sobriety.

Q4. If you are convicted of a first-time DUI while operating your personal vehicle, what happens to your CDL?

A: Your CDL will be disqualified for one year. Why: Major offenses committed in any vehicle affect your commercial driving privileges.

Q5. Under Florida law, who is responsible for ensuring that cargo is properly secured and does not obscure vision or interfere with driving?

A: The driver. Why: Even if someone else loaded the cargo, the driver is ultimately responsible for the safety of the load before moving the vehicle.

🚛 SECTION 2: VEHICLE INSPECTION & BASIC CONTROL
Q6. What is the most important reason for doing a pre-trip inspection?

A: Safety. Why: To find problems that could cause a crash or breakdown before you get on the road.

Q7. Which of these is NOT part of the pre-trip inspection of the engine compartment?

A: Checking the air pressure in all tires. Why: Tire pressure is checked during the walk-around inspection, not in the engine compartment.

Q8. What is the minimum tread depth required for front steering tires?

A: 4/32 of an inch. Why: Front tires require more tread for steering control than other tires, which require 2/32 inch.

Q9. When testing hydraulic brakes for a leak, you should pump the brake pedal three times, then hold it down for five seconds. The pedal should not move. If it does, what does that mean?

A: There may be a leak in the hydraulic system.

Q10. Why should you back toward the driver's side whenever possible?

A: You can see better. Why: Backing to the driver's side allows you to watch the rear of your vehicle out of the side window, reducing blind spots.

Q11. When stopped on a hill, what should you do before you start moving forward to prevent rolling back?

A: Apply the parking brake or use the trailer hand valve until the engine has enough power to pull forward.

Q12. What is the basic rule for using turn signals?

A: Signal early. Signal continuously. Cancel your signal after the turn is complete.

Q13. How does the weight of the vehicle affect stopping distance?

A: Heavier vehicles require more braking power and longer distances to stop.

Q14. What is "brake fade"?

A: The loss of braking power caused by excessive heat build-up from using the brakes too much. Why: This is a critical danger on long downgrades.

Q15. The proper way to hold a steering wheel is at what clock positions?

A: 9 o'clock and 3 o'clock (or 10 and 2), with hands on opposite sides of the wheel. Why: This provides the best leverage and control.

🛣️ SECTION 3: SPEED & SPACE MANAGEMENT
Q16. What are the three factors that add up to total stopping distance?

A: Perception Distance + Reaction Distance + Braking Distance.

Q17. You are driving a 40-foot vehicle at 35 mph. How much following distance should you leave between you and the vehicle ahead?

A: 4 seconds. Why: The rule is one second for every 10 feet of vehicle length at speeds below 40 mph.

Q18. You are driving the same 40-foot vehicle at 55 mph. What is the required following distance now?

A: 5 seconds. Why: For speeds over 40 mph, you must add an additional second to the total.

Q19. Why is it dangerous to travel directly alongside another vehicle?

A: You may be in their blind spot, and it limits your ability to change lanes to avoid a hazard.

Q20. If you are being tailgated, what is the safest action to take?

A: Increase your following distance from the vehicle in front of you. Why: This gives you more time to stop smoothly, reducing the chance of the tailgater hitting you from behind.

Q21. How does speed affect hydroplaning?

A: Hydroplaning is more likely to occur at higher speeds.

Q22. What should you do if you miss your exit on a highway?

A: Continue to the next exit. Why: Never back up on a highway or attempt a U-turn across the median.

Q23. When driving at night, you should be able to stop within:

A: The distance you can see ahead with your headlights.

Q24. You should use your high beams whenever possible, except when:

A: Within 500 feet of an approaching vehicle or when following another vehicle within 500 feet.

Q25. What is the primary reason for slowing down before entering a curve?

A: To avoid locking the wheels when braking in the curve, and to prevent a rollover from centrifugal force.

⚠️ SECTION 4: HAZARDS & EMERGENCIES
Q26. What is the first thing you should do if your brakes fail while driving downhill?

A: Look for an escape ramp or escape route.

Q27. If your vehicle goes into a front-wheel skid, what will happen when you turn the steering wheel?

A: The vehicle will continue to go straight ahead regardless of how you turn the wheel.

Q28. What is the correct technique for recovering from a rear-wheel skid?

A: Stop braking and steer in the direction of the skid (the direction the rear is sliding).

Q29. You are driving on a two-lane road and an oncoming driver drifts into your lane, heading straight for you. Which of these is generally the best action?

A: Steer to the right. Why: Moving to the right (onto a shoulder or field) is almost always safer than moving left into oncoming traffic.

Q30. What are the three reflective triangles intended to do?

A: Warn other drivers that you are stopped on the side of the road.

Q31. Where must you place the three reflective triangles on a two-lane or undivided highway?

A: One within 10 feet of the rear, one about 100 feet behind, and one about 100 feet ahead of the vehicle.

Q32. If a fire occurs in your cargo area, what should you NOT do?

A: Open the cargo doors. Why: Opening the doors introduces oxygen, which can cause the fire to flare up rapidly.

Q33. A B:C type fire extinguisher is designed to fight which types of fires?

A: Electrical fires and burning liquids (like gasoline or oil).

Q34. What should you do if a tire blows out at highway speed?

A: Hold the steering wheel firmly, stay off the brake until the vehicle slows down, and move to the side of the road.

Q35. When should you use your four-way flashers (hazard lights)?

A: When your vehicle is stopped on the side of the road or moving very slowly and creating a hazard for other drivers.

🧠 SECTION 5: DRIVER FITNESS & CARGO
Q36. Which of these statements about drinking alcohol and driving is true?

A: A few beers are just as dangerous as a few shots of whiskey; it's the amount of pure alcohol that matters.

Q37. What is the only thing that can sober up a person who has been drinking?

A: Time.

Q38. What happens if you refuse to submit to a chemical test for alcohol or drugs when requested by a law enforcement officer (Implied Consent Law)?

A: You will be immediately placed out-of-service for 24 hours and your CDL will be disqualified for at least one year.

Q39. Can you use over-the-counter drugs while driving a CMV?

A: Only if the doctor who prescribed them or the pharmacist confirms they will not affect your ability to drive safely. Why: Many common cold and allergy medicines can cause drowsiness.

Q40. What is the definition of "Gross Vehicle Weight Rating" (GVWR)?

A: The maximum total weight of a single vehicle plus its load, as specified by the manufacturer.

Q41. Why must you cover cargo?

A: To protect people from spilled cargo, to protect the cargo from weather, and to reduce drag (improve fuel economy).

Q42. How often must you check your cargo while on the road?

A: Within the first 50 miles, and then every 3 hours or 150 miles, whichever comes first.

Q43. What is the minimum number of tie-downs required for any flatbed load, regardless of weight or size?

A: Two.

Q44. You do not have a Hazardous Materials endorsement on your CDL. Are you allowed to drive a vehicle hauling hazardous materials?

A: Yes, but only if the materials do not require placards.

Q45. What is the purpose of a cargo headerboard (headache rack)?

A: To protect the driver from cargo shifting forward during a sudden stop or crash.

📝 SECTION 6: MISCELLANEOUS GENERAL KNOWLEDGE
Q46. You are driving a vehicle with a manual transmission. When should you downshift for a curve?

A: Before entering the curve.

Q47. What is the main reason you should not use the trailer hand brake to straighten out a jackknifing trailer?

A: Because the trailer brakes are what caused the skid in the first place; applying them more will worsen the jackknife.

Q48. What is "off-tracking" or "cheating"?

A: When the rear wheels follow a different, shorter path than the front wheels during a turn.

Q49. When should you avoid using the engine brake (jake brake)?

A: On slippery or icy roads. Why: The sudden braking force on the drive wheels can cause a skid.

Q50. You are approaching a railroad crossing. You must stop within how many feet of the nearest rail?

A: Within 50 feet but not less than 15 feet.

Ready for the Real Thing? If you missed more than 10 questions, you are not ready. Go back to the 2026 Florida CDL Handbook and review the sections where you struggled. Don't gamble with your career—master the material. Good luck from the team at DMVTestMaster!