Florida CDL Written Test 2026

Florida CDL General Knowledge (Q1–30)

Q1. What is the minimum age to hold a Florida CDL for intrastate driving?
A. 18 years old

Q2. What is the minimum age to drive interstate with a CDL?
A. 21 years old

Q3. What does GVWR stand for?
A. Gross Vehicle Weight Rating

Q4. What is the legal BAC limit for CDL drivers?
A. 0.04%

Q5. How many days does a CDL driver have to report a conviction to their employer?
A. 30 days

Q6. Who is responsible for cargo securement?
A. The driver

Q7. What document allows you to operate a commercial motor vehicle?
A. Commercial Driver License

Q8. What must be inspected before every trip?
A. The vehicle

Q9. What does “out-of-service” mean?
A. The driver or vehicle cannot operate

Q10. What vehicle weight requires a CDL?
A. Over 26,001 pounds GVWR

Q11. What increases stopping distance most?
A. Vehicle weight and speed

Q12. What is off-tracking?
A. Trailer wheels follow a different path

Q13. What must you do at railroad crossings?
A. Stop, look, and listen

Q14. Who has the right-of-way at uncontrolled intersections?
A. Traffic on the right

Q15. What happens if a CDL driver refuses a DOT alcohol test?
A. Immediate disqualification

Q16. How often must a CDL medical certificate be renewed?
A. Every 2 years or as required

Q17. Who regulates CDL safety rules?
A. FMCSA

Q18. What is jackknifing?
A. Trailer swings toward the tractor

Q19. What is the purpose of engine retarders?
A. Help slow the vehicle

Q20. What is the first step in skid recovery?
A. Ease off the accelerator

Q21. Who must wear seat belts in a CMV?
A. All occupants

Q22. What is the leading cause of truck rollovers?
A. Speeding in curves

Q23. What is the minimum tread depth on steer tires?
A. 4/32 inch

Q24. When are headlights required?
A. Sunset to sunrise or low visibility

Q25. Who is responsible for vehicle condition?
A. The driver

Q26. What is space management?
A. Controlling space around the vehicle

Q27. What happens when brakes overheat?
A. Brake fade

Q28. What does CDL stand for?
A. Commercial Driver License

Q29. What should you do if driving conditions worsen?
A. Reduce speed

Q30. What document proves medical qualification?
A. Medical Examiner’s Certificate

Air Brakes (Q31–50)

Q31. What powers air brakes?
A. Compressed air

Q32. Normal operating air pressure range?
A. 100–125 PSI

Q33. What happens when air pressure is too low?
A. Spring brakes engage

Q34. What controls braking force?
A. Brake pedal

Q35. What is brake fade?
A. Loss of braking power from heat

Q36. What should be drained daily from air tanks?
A. Moisture

Q37. What controls maximum air pressure?
A. Air governor

Q38. What warning light indicates low air pressure?
A. Red warning light

Q39. What should you do if low air warning activates?
A. Stop safely

Q40. What causes air leaks?
A. Damaged hoses or fittings

Q41. What prevents air line freezing?
A. Alcohol evaporator

Q42. What type of braking is used on slippery roads?
A. Controlled or stab braking

Q43. How fast should air pressure build from 85–100 PSI?
A. Within 45 seconds

Q44. What engages spring brakes?
A. Loss of air pressure

Q45. What brake component pushes shoes outward?
A. S-cam

Q46. Why are air brakes safer than hydraulic brakes?
A. They have redundancy

Q47. What must be checked in air brake tests?
A. Pressure buildup and leaks

Q48. What happens if air tanks are not drained?
A. Brake failure risk

Q49. Air brake endorsement required?
A. Yes

Q50. Air brakes are required on vehicles over what weight?
A. 26,001 pounds

Combination Vehicles (Q51–65)

Q51. What increases jackknife risk?
A. Hard braking

Q52. Where is the pivot point of a tractor-trailer?
A. Fifth wheel

Q53. What must be locked before driving?
A. Fifth wheel jaws

Q54. What is trailer swing?
A. Rear trailer moves outward

Q55. What makes backing difficult?
A. Delayed trailer response

Q56. What must be set before uncoupling?
A. Parking brakes

Q57. Why inspect glad hands?
A. Prevent air leaks

Q58. What affects stopping distance most?
A. Speed and weight

Q59. Why are combination vehicles unstable?
A. High center of gravity

Q60. What should be tested before moving?
A. Trailer brakes

Q61. What causes fishtailing?
A. Excessive speed

Q62. Why do trailers cut corners?
A. Off-tracking

Q63. What is required for Class A CDL?
A. Combination vehicle test

Q64. What increases rollover risk?
A. Top-heavy loads

Q65. What should be checked before coupling?
A. Fifth wheel alignment

HazMat, Passenger & School Bus (Q66–100)

Q66. What requires HazMat placards?
A. Regulated hazardous materials

Q67. Who needs a HazMat endorsement?
A. HazMat drivers

Q68. What document identifies HazMat cargo?
A. Shipping papers

Q69. Smoking near HazMat is:
A. Prohibited

Q70. Who inspects HazMat loads?
A. Driver

Q71. What endorsement is needed for buses?
A. Passenger endorsement

Q72. Why are passengers considered dangerous cargo?
A. High injury risk

Q73. School buses must stop at:
A. Railroad crossings

Q74. Emergency exits must be:
A. Clearly marked

Q75. What is prohibited on school buses?
A. Hazardous materials

Q76. When should passengers be evacuated?
A. When danger exists

Q77. Who conducts HazMat background checks?
A. TSA

Q78. Placards must appear on how many sides?
A. Four sides

Q79. What is a forbidden load?
A. Certain explosives

Q80. What increases HazMat risk?
A. Poor securement

Q81. Passenger endorsement includes what topic?
A. Evacuation procedures

Q82. School bus stop arm means:
A. Traffic must stop

Q83. What color are school buses?
A. National School Bus Yellow

Q84. HazMat penalties include:
A. Fines and disqualification

Q85. Who enforces HazMat laws?
A. FMCSA and DHS

Q86. When should placards be removed?
A. After unloading

Q87. What is segregation?
A. Separating incompatible materials

Q88. Passenger safety briefings are:
A. Required

Q89. Emergency equipment includes:
A. Fire extinguisher

Q90. HazMat leaks must be:
A. Reported immediately

Q91. Passenger vehicles require:
A. Longer stopping distance

Q92. School bus mirrors are used to:
A. Monitor danger zones

Q93. Who is responsible for HazMat compliance?
A. The driver

Q94. What endorsement is considered the hardest?
A. HazMat

Q95. Passenger endorsement test covers:
A. Loading and safety

Q96. School bus endorsement requires:
A. Special training

Q97. What happens if HazMat rules are violated?
A. CDL penalties

Q98. Who has final authority over safety?
A. The driver

Q99. What improves CDL test success?
A. Repeated practice

Q100. What is the key to passing the Florida CDL written test?
A. Studying the Florida CDL Handbook
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