Florida CDL Practice Test: General Knowledge (FL) 6

4.8 out of 5 (93 votes)
80% Passing score
50 Questions
10 Mistakes allowed
Florida residents gearing up to obtain a Commercial Driver's License (CDL), you've arrived at the right place. Our Florida CDL General Knowledge Practice Test is a crucial step in your preparation. This sixth test in our series is designed to closely mimic the real exam you'll face, offering a comprehensive review of key topics. Featuring 50 questions, our Florida DMV CDL practice test challenges your knowledge across a diverse range of subjects essential for every aspiring commercial driver. From understanding your vehicle's equipment to mastering emergency response and accident procedures, the practice test ensures you're well-prepared for the road ahead. It includes questions on pre-trip inspections, which are pivotal in ensuring vehicle safety before each journey. Additionally, while you may not be applying for a Hazardous Materials (HazMat) endorsement just yet, the DMV practice test introduces crucial HazMat knowledge every CDL holder should possess. Our Florida CDL general knowledge practice test stands out because it's tailored specifically to Florida's driving regulations and road signs. The questions are derived directly from the official CDL driver's manual provided by the state of Florida, ensuring that you're studying the most relevant and accurate information. The manual is the foundation for both our practice tests and the real CDL exam, so if it's not in the manual, it won't appear on the test in 2026. To enhance your learning experience, we've included visual aids like images of road signs and typical traffic scenarios. These visuals are a great help, especially for those who find learning through images more effective. Remember, the set of 50 Florida CDL test questions remains constant no matter how many times you attempt the test, allowing you to focus on mastering each one. A score of at least 40 correct answers is required to pass, mirroring the real Florida CDL test requirements. So, take your time, review your answers, and use this practice test to build a solid foundation for your CDL exam success.
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Sample Florida CDL Test Questions - General Knowledge

Question 1

If you are not seriously injured at a crash scene, what should be your first priority?

  1. A Leave the scene immediately
  2. B Remove your personal belongings
  3. C Protect the area from another crash
  4. D Determine which driver was at fault

Correct answer: C – Protect the area from another crash

The first priority is to keep another crash from happening at the same location. If possible, move the involved vehicle to the roadside, activate the flashers, and place reflective triangles where approaching drivers can see them in time. After protecting the area, notify authorities and care for injured people.

Source: Florida Commercial Driver’s License Manual — § 2.20.1, “Protect the Area” alterations reviewed and applied for localization.

Question 2

What is gross combination weight, or GCW?

  1. A The combined weight of the cargo, driver, and passengers
  2. B The manufacturer’s maximum weight rating for one vehicle
  3. C The combined weight of a trailer and its cargo only
  4. D The total weight of the powered unit, trailers, and cargo

Correct answer: D – The total weight of the powered unit, trailers, and cargo

Gross combination weight is the total actual weight of the powered unit, the attached trailer or trailers, and the cargo. GCW differs from GCWR. Gross combination weight rating is the manufacturer-specified maximum weight for a particular combination of vehicles and its load.

Source: Florida Commercial Driver’s License Manual — § 3.2.1, “Definitions You Should Know” alterations reviewed and applied for localization.

Question 3

What condition must be verified before driving a tank vehicle?

  1. A All valves and manhole covers are closed
  2. B Open covers are used only during daylight
  3. C Open valves are used only on city streets
  4. D Open covers are used only on highways

Correct answer: A – All valves and manhole covers are closed

Never drive a tank vehicle with open valves or manhole covers. During inspection, check the intake, discharge, and cutoff valves and make sure they are in the correct positions before moving the vehicle. Manhole covers must have their gaskets and close correctly.

Source: Florida Commercial Driver’s License Manual — §§ 8.1.1-8.1.2, “Leaks” and “Check Special Purpose Equipment” alterations reviewed and applied for localization.

Question 4

On a Florida road, what does a yellow diamond sign containing a black cross symbol warn about?

This sign indicates _________________.
  1. A A pedestrian crosswalk
  2. B A railroad crossing
  3. C A roadside rest area
  4. D A crossroad intersection

Correct answer: D – A crossroad intersection

The black cross symbol is the Cross Road warning sign, designated W2-1. It provides advance notice of an intersection and the possibility of traffic turning or entering from the intersecting road. Drivers should be prepared to observe and respond to traffic at the upcoming intersection.

Source: Fla. Admin. Code R. 14-15.010 – Manual on Uniform Traffic Control Devices, Manual on Uniform Traffic Control Devices, 11th Edition — § 2C.41, “Intersection Warning Signs (W2-1 through W2-8)”

Question 5

At 55 mph, what following interval should be allowed for a 30-foot commercial vehicle?

  1. A 3 seconds
  2. B 4 seconds
  3. C 5 seconds
  4. D 6 seconds

Correct answer: B – 4 seconds

The recommended interval is at least one second for every 10 feet of vehicle length at speeds below 40 mph. A 30-foot vehicle begins with three seconds. Because 55 mph is above 40 mph, one additional second is required, producing a four-second following interval.

Source: Florida Commercial Driver’s License Manual — § 2.7.1, “Space Ahead” alterations reviewed and applied for localization.

Question 6

During the Florida CDL vehicle inspection, what must be checked on every tire?

  1. A Tread depth
  2. B Tire condition
  3. C Tire inflation
  4. D All of these answers are correct

Correct answer: D – All of these answers are correct

Every tire must be inspected for proper inflation, physical condition, and tread depth. Condition checks include cuts, exposed body plies, damaged valve stems, bumps, and bulges. Minimum tread depth is 4/32 inch on steering-axle tires and 2/32 inch on all other tires.

Source: Florida Commercial Driver License Manual — Section 11M, “Tires”

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