Free Louisiana CDL Practice Test — Updated for 2025

Getting your Commercial Driver’s License in Louisiana starts with the written knowledge tests. This page gives you free, simple Louisiana CDL practice tests for every major section: General Knowledge, Air Brakes, Combination Vehicles, Hazmat, Passenger, School Bus, Tankers, and Doubles/Triples. You’ll see one question at a time, get instant right/wrong feedback, and read a short explanation after each answer. Use these tests to learn the rules, fix weak spots fast, and build real confidence before you walk into your exam.

Kentucky CDL at a Glance (Plain-English Summary)

  • Age & eligibility:
    You must be 18+ to drive in-state (intrastate) and 21+ to drive across state lines (interstate) or to carry hazardous materials or passengers.
  • Valid license & record:
    You need a valid Louisiana driver’s license and a fairly clean driving record.
  • Medical card:
    Most CDL drivers must hold a valid DOT Medical Examiner’s Certificate and self-certify their driving type.
  • CLP:
    Pass the written tests for your vehicle class (A/B/C) and any needed endorsements to get a Commercial Learner’s Permit (CLP).
  • Skills test:
    After holding your CLP for at least 14 days, take the three-part skills test (pre-trip, basic control, on-road).
  • ELDT:
    Entry-Level Driver Training is required (federal rule) for Class A/B and for H, S, P endorsements before you take the skills test.
  • Hazmat:
    Hazmat (H) also requires a TSA background check and a Hazmat knowledge test.
  • Where to test:
    Knowledge and skills tests are handled by the Louisiana Office of Motor Vehicles (OMV) and approved third-party testers. Check current steps, fees, and locations with the OMV.
  • Tip:
    Rules and fees can change. Always confirm the latest requirements with the Louisiana OMV before you schedule.

What’s on the Louisiana CDL Knowledge Tests

General Knowledge

— vehicle inspection, safe driving habits, space and speed management, night/poor weather driving, distracted and drowsy driving, emergency maneuvers, railroad crossings, cargo basics, and road sharing.

Air Brakes

— parts and functions, dual-air systems, warning signals, spring brakes, proper brake use, stopping distance, downhill control, and brake fade.

Combination Vehicles

— coupling/uncoupling, skid and jackknife prevention, rollover risks, following distance, backing safety, and inspections for tractor-trailers.

Hazardous Materials (H)

— hazmat classes, placards, shipping papers, loading/unloading, segregation, parking and attendance, emergency response, and security awareness (plus TSA background check requirement).

Passenger (P) & School Bus (S)

— loading/unloading, prohibited practices, emergency exits, evacuation, rail crossings, student management, and mirror checks.

Tankers (N)

— surge and slosh, rollover risk, safe speed on curves, proper stops/starts, and inspection points.

Doubles/Triples (T)

— converter dollies, coupling order, trailer checks, rollover and off-tracking control.

Pre‑Trip Inspection

— engine compartment, steering, suspension, brakes, tires/wheels, lights, coupling, in-cab checks, and emergency equipment.

Required for All CDL Drivers

These tests are mandatory for all Commercial Driver's License applicants

About General Knowledge Tests

Basic rules, regulations, and safe driving practices for commercial vehicles

General Knowledge Test 1

Basic CDL knowledge and traffic laws

📝 50 Questions 🎯 80% to pass
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General Knowledge Test 2

Vehicle safety and inspection procedures

📝 50 Questions 🎯 80% to pass
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General Knowledge Test 3

Driving techniques and hazard awareness

📝 50 Questions 🎯 80% to pass
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General Knowledge Test 4

Transportation of cargo and passengers

📝 50 Questions 🎯 80% to pass
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General Knowledge Test 5

Emergency procedures and vehicle maintenance

📝 50 Questions 🎯 80% to pass
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General Knowledge Test 6

Final comprehensive review test

📝 50 Questions 🎯 80% to pass
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About Air Brakes Tests

Air brake systems, inspection, and operation procedures

Air Brakes Test 1

Basic air brake system components and operation

📝 25 Questions 🎯 80% to pass
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Air Brakes Test 2

Air brake inspection and testing procedures

📝 25 Questions 🎯 80% to pass
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Air Brakes Test 3

Emergency procedures and troubleshooting

📝 25 Questions 🎯 80% to pass
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Air Brakes Test 4

Advanced air brake systems and safety

📝 25 Questions 🎯 80% to pass
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About Pre-Trip Inspection Tests

Vehicle inspection procedures and safety checks

Pre-Trip Inspection Test 1

Engine compartment and cab inspection

📝 20 Questions 🎯 80% to pass
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Pre-Trip Inspection Test 2

Exterior vehicle inspection

📝 20 Questions 🎯 80% to pass
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Pre-Trip Inspection Test 3

Trailer and coupling system inspection

📝 20 Questions 🎯 80% to pass
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Endorsement Tests

Additional certifications for specialized commercial driving

About Combination Vehicles Tests

Tractor-trailers, truck and trailer combinations

Combination Vehicles Test 1

Coupling and uncoupling procedures

📝 20 Questions 🎯 80% to pass
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Combination Vehicles Test 2

Inspection of combination vehicles

📝 20 Questions 🎯 80% to pass
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Combination Vehicles Test 3

Driving combination vehicles safely

📝 20 Questions 🎯 80% to pass
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Combination Vehicles Test 4

Backing and maneuvering techniques

📝 20 Questions 🎯 80% to pass
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Combination Vehicles Test 5

Advanced combination vehicle operation

📝 20 Questions 🎯 80% to pass
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About Hazmat Tests

Hazardous materials transportation and safety

Hazmat Test 1

Hazmat classification and identification

📝 30 Questions 🎯 80% to pass
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Hazmat Test 2

Loading and handling procedures

📝 30 Questions 🎯 80% to pass
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Hazmat Test 3

Documentation and placarding

📝 30 Questions 🎯 80% to pass
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Hazmat Test 4

Emergency response and safety procedures

📝 30 Questions 🎯 80% to pass
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About Passenger Vehicles Tests

Buses and vehicles designed to transport passengers

Passenger Vehicle Test 1

Pre-trip inspection for passenger vehicles

📝 20 Questions 🎯 80% to pass
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Passenger Vehicle Test 2

Loading and unloading passengers

📝 20 Questions 🎯 80% to pass
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Passenger Vehicle Test 3

Passenger safety and emergency procedures

📝 20 Questions 🎯 80% to pass
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Passenger Vehicle Test 4

Special situations and regulations

📝 20 Questions 🎯 80% to pass
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About School Bus Tests

School bus operation and student transportation safety

School Bus Test 1

Loading and unloading students

📝 20 Questions 🎯 80% to pass
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School Bus Test 2

Emergency exits and evacuation procedures

📝 20 Questions 🎯 80% to pass
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School Bus Test 3

Student management and safety

📝 20 Questions 🎯 80% to pass
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School Bus Test 4

Special hazards and situations

📝 20 Questions 🎯 80% to pass
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About Tanker Vehicles Tests

Liquid cargo transportation and tank vehicle operation

Tanker Vehicle Test 1

Tanker vehicle inspection and safety

📝 20 Questions 🎯 80% to pass
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Tanker Vehicle Test 2

Driving techniques for liquid cargo

📝 20 Questions 🎯 80% to pass
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Tanker Vehicle Test 3

Loading, unloading, and emergency procedures

📝 20 Questions 🎯 80% to pass
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About Doubles/Triples Tests

Double and triple trailer combinations

Doubles/Triples Test 1

Coupling and inspection procedures

📝 20 Questions 🎯 80% to pass
Start Test

Doubles/Triples Test 2

Driving techniques and safety

📝 20 Questions 🎯 80% to pass
Start Test

Doubles/Triples Test 3

Emergency procedures and troubleshooting

📝 20 Questions 🎯 80% to pass
Start Test

FAQs — Louisiana CDL

Additional certifications for specialized commercial driving

Q1- Who needs a CDL in Louisiana?

Vehicles at or above 26,001 lb GVWR, combinations 26,001+ GCWR with a 10,001+ lb trailer, vehicles carrying 16+ passengers, or vehicles requiring hazmat placards.

Q2- Minimum age for CDL in Louisiana?

18 intrastate, 21 interstate/hazmat/passenger.

Q3- Do I need a DOT medical card?

Generally yes, keep a current Medical Examiner’s Certificate and self‑certify your driving type.

Q4- What is ELDT?

Entry‑Level Driver Training required for Class A/B and H/P/S endorsements before skills/endorsement tests.

Q5- CLP holding period?

Hold your CLP at least 14 days before taking the skills test.

Q6- Where do I test?

Knowledge/skills tests are scheduled with the Louisiana OMV and approved third-party testers.

Q7- Passing score?

Most knowledge tests require 80% to pass; confirm locally.

Q8- Hazmat background check?

Yes — TSA background check plus hazmat knowledge test.

Q9- What to bring on test day?

Driver’s license, CLP, medical card, ELDT proof (if needed), and a compliant test vehicle for the skills exam.