Free Connecticut CDL Practice Test — Updated for 2025

To get your Commercial Driver’s License in Connecticut, you must pass the CDL knowledge exams. This page provides free Connecticut CDL practice tests across every subject: General Knowledge, Air Brakes, Combination Vehicles, Hazmat, Passenger, School Bus, Tankers, and Doubles/Triples. Each test shows one question at a time, provides instant feedback, and explains the answer. Updated for 2025 to help you prepare with confidence.

Connecticut CDL at a Glance (Plain-English Summary)

  • Age & eligibility:
    Must be 18+ for intrastate driving, 21+ for interstate, hazmat, or passengers.
  • License:
    Must hold a valid Connecticut driver’s license.
  • Medical card:
    CDL drivers usually must hold a valid DOT Medical Examiner’s Certificate
  • CLP:
    Pass written CDL exams for your class and endorsements to get a Commercial Learner’s Permit (CLP).
  • ELDT:
    Entry‑Level Driver Training required federally for Class A/B and endorsements H, S, P.
  • Skills test:
    CLP must be held at least 14 days before pre‑trip, basic control, and road test.
  • Hazmat:
    Requires TSA background check and Hazmat test.
  • Testing agency:
    Administered by the Connecticut DMV.

What’s on the California CDL Knowledge Tests

General Knowledge

— inspections, safe driving, emergencies, sharing the road, cargo, speed/space management.

Air Brakes

— parts, dual systems, gauges, brake use, stopping distance.

Combination Vehicles

— coupling/uncoupling, rollover, jackknife prevention, inspections.

Hazardous Materials (H)

— hazmat classes, placards, shipping papers, segregation, TSA.

Passenger (P) & School Bus (S)

— loading/unloading, evacuation, mirror checks, safety practices.

Tankers (N)

— surge/slosh, rollover prevention, speed on curves, inspections.

Doubles/Triples (T)

— converter dollies, coupling order, off‑tracking.

Pre‑Trip Inspection

— engine, tires, brakes, suspension, lights, in‑cab, safety gear.

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
Start Test

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
Start Test

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
Start Test

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
Start Test

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
Start Test

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
Start Test
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 — Connecticut CDL

Additional certifications for specialized commercial driving

Q1- Who needs a CDL in Connecticut?

Drivers of:
  • Vehicles 26,001 lb+ GVWR
  • Combinations 26,001 lb+ GCWR with trailer over 10,001 lb.
  • Buses/vans for 16+ passengers.
  • Hazmat placarded vehicles.

Q2- Minimum age for CDL in Connecticut?

18 intrastate, 21 interstate/hazmat/passenger.

Q3- DOT medical card required?

Yes, unless exempt.

Q4- What is ELDT?

Entry‑Level Driver Training required for Class A/B and H, S, P endorsements.

Q5- CLP holding time?

At least 14 days

Q6- Where to take CDL tests?

Through the Connecticut DMV

Q7- Passing score?

80%

Q8- CDL tests in Spanish?

Some tests may be offered in Spanish. Confirm with DMV.

Q9- Hazmat endorsement requirements?

TSA background check + Hazmat exam.

Q10- What to bring test day?

Connecticut license, CCLP, medical card, ELDT proof, and a test vehicle.