Free Florida CDL practice test online
Take a free Florida CDL practice exam online with clear explanations—no sign-up. Coverage includes general knowledge, vehicle systems, combination vehicles, cargo, and endorsements. Then verify current requirements with Florida Highway Safety and Motor Vehicles.
CDL knowledge tests are federally regulated, so the passing score in Florida is the same as everywhere else: 80% correct on every knowledge test. You must also hold a commercial learner’s permit for 14 days before the skills test.
New to the knowledge test? CDL endorsements explained · One-week study plan
Requirements before you test
Florida CDL test requirements
Commercial licensing is largely federal. Any figure above credited to a 49 CFR section applies in every state — see 49 CFR 383.135(a)(1) and 49 CFR 383.25(e). A figure credited to Florida Highway Safety and Motor Vehicles is Florida’s own, and may be stricter than the federal floor. Test length, fees, and scheduling are set by Florida Highway Safety and Motor Vehicles (official source).
Entry-Level Driver Training comes first
Since February 7, 2022, a new Class A or Class B CDL, a class upgrade, or a first passenger, school bus, or hazardous materials endorsement requires training from a provider on the FMCSA Training Provider Registry (49 CFR 380.600). Practice questions are study material and do not satisfy that requirement.
FMCSA Training Provider RegistryYou need a Florida licence first
A commercial learner’s permit only counts if you already hold an ordinary licence from the same state (49 CFR 383.25(a)(2)). The Florida non-commercial knowledge test runs 50 questions and needs 40 correct, with permits issued from age 15.
Florida permit practice testWhat you will practice
Build coverage topic by topic.
Each question carries a topic, difficulty, explanation, and source section so your review has context.
Sample questions
5 Florida CDL practice questions
Try these Florida sample questions now — each shows the correct answer with a plain-language explanation and a source section. The full 600-question bank is in the practice run.
1. Gross Combination Weight Rating (GCWR) is:
- AThe weight of cargo alone
- BThe empty weight of the tractor only
- The maximum combined weight rating of the power unit and towed unit(s)
- DAlways equal to GVWR
Answer: The maximum combined weight rating of the power unit and towed unit(s). GCWR is the manufacturer’s maximum for the combination. GVWR applies to a single vehicle.
Source: Commercial Driver License Manual — General knowledge — vehicle weights
2. What is the only genuine remedy for fatigue behind the wheel?
- AStrong coffee
- BFresh air from an open window
- Sleep
- DLoud music
Answer: Sleep. Stimulants and fresh air only mask drowsiness for a short time. Stop in a safe place and sleep before continuing.
Source: Commercial Driver License Manual — Driver fitness — fatigue
3. After coupling a converter dolly, the pintle hook must be:
- ALeft open for flexibility
- Latched closed with its lock engaged
- CRemoved while the trailer is loaded
- DResting on the safety chains only
Answer: Latched closed with its lock engaged. An unlatched pintle can drop the towed trailer. Confirm the latch and any secondary lock.
Source: Commercial Driver License Manual — Doubles and triples — converter dollies
4. Never load corrosive liquids with certain incompatible explosives, poisonous gases, or:
- AEmpty packaging only
- BORM-D consumer commodities always
- CClass 9 miscellaneous only
- Division 4.2 spontaneously combustible materials and specified poison divisions
Answer: Division 4.2 spontaneously combustible materials and specified poison divisions. Segregation tables forbid many corrosive/explosive/poison combinations because mixing can cause fires or toxic releases.
Source: Commercial Driver License Manual — Hazardous materials — segregation
5. What happens if the service and emergency glad hands are connected the wrong way round?
- AThe tractor will not start
- BThe trailer lights fail
- CThe trailer brakes apply permanently
- Air goes to the wrong line and the trailer brakes may not work when needed
Answer: Air goes to the wrong line and the trailer brakes may not work when needed. Crossed lines can leave the trailer without emergency braking. Colour-coded and shaped couplers exist to prevent the mistake.
Source: Commercial Driver License Manual — Combination vehicles — air lines
CDL knowledge areas
Classes and endorsements, organized.
Each area below scopes the reviewed question bank to one knowledge test. The material is federal, so it applies in Florida just like everywhere else — the endorsement guide explains how the codes fit together.
The foundation for commercial driving: inspections, space, speed, communication, hazards, and safe operation.
- Pre-trip inspection
- Space and speed management
- Railroad crossings
- Emergency procedures
Understand air-brake components, inspections, warning devices, stopping distance, and controlled braking.
- Dual air systems
- Low-air warnings
- Brake lag and fade
- Applied-leak and static checks
Prepare for safe coupling, inspection, turning, backing, and handling of tractor-trailer combinations.
- Fifth-wheel inspection
- Coupling and uncoupling
- Off-tracking
- Trailer skid prevention
Study hazard communication, shipping papers, placards, loading rules, parking, and emergency response responsibilities.
- Hazard classes
- Placards and labels
- Shipping papers
- Loading and segregation
Learn how liquid surge, outage, bulkheads, and high centers of gravity change vehicle handling.
- Liquid surge
- Outage requirements
- Smooth braking
- Rollover prevention
Practice converter-dolly inspection, coupling order, rearward amplification, and stability principles.
- Coupling sequence
- Converter dollies
- Rearward amplification
- Space management
Prepare to inspect, load, and operate buses while keeping passengers, aisles, and exits safe.
- Vehicle inspection
- Passenger loading
- Emergency exits
- Prohibited practices
Review student loading, danger zones, mirrors, emergency procedures, and special railroad-crossing duties.
- Danger zones
- Student loading
- Mirror use
- Railroad crossings
More south practice
Nearby CDL practice tests
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Common questions
What this practice can—and cannot—tell you.