Connecticut CDL practice test
Published Updated Licensing sources checked:
How do I prepare for the Connecticut CDL knowledge test?
If you are preparing for your first permit, start with general knowledge and the official Connecticut instructions below. If your vehicle needs air brakes or combination vehicles, add those federal study sets; for hazardous materials, use the separate hazmat set. Compare the state’s published test rules with its current manual before you test. These practice sets teach federal topics and do not copy the state exam.
This page is study material. It is not the Connecticut state exam, and it does not copy state test questions. Check the official Connecticut pages below before you test.
| Your situation | Start with… |
|---|---|
| A quick first try | Take a 10-question warm-up |
| Ready for a longer attempt | Take the 50-question general knowledge exam |
| Need state rules or documents | Check the Connecticut application steps |
Connecticut official CDL manual (PDF) — link checked . Study its rules alongside our federal-standard bank. Our 50-question exam length is a study setting; use the official counts below for Connecticut.
Connecticut DMV’s CLP page, checked November 13, 2026, prints question counts and correct-answer thresholds for general knowledge, vehicle and endorsement tests. Use those figures below alongside the manual designated for current testing. Our federal study banks do not copy Connecticut exam questions.
Which tests do I need in Connecticut?
| Your vehicle or work | Required study and tests |
|---|---|
| All permit applicants | Start with general knowledge. Official requirements. Federal warm-up · Federal exam mode |
| Class A combination vehicle | Add combination vehicles. Official requirements. Federal warm-up · Federal exam mode |
| Vehicle with air brakes | Add air brakes and check restriction rules. Official requirements. Federal warm-up · Federal exam mode |
| Passenger vehicle | Add passenger testing. Official requirements. Federal warm-up · Federal exam mode |
| School bus | Study school bus and passenger topics; check state requirements. Official requirements. Federal warm-up · Federal exam mode |
| Tank vehicle | Add tank vehicle testing. Official requirements. Federal warm-up · Federal exam mode |
| Hazardous materials | Add hazmat testing and check approval and training steps. Official requirements. Federal warm-up · Federal exam mode |
| Doubles or triples | Add doubles and triples testing; check vehicle limits. Official requirements. Federal warm-up · Federal exam mode |
Check the current Connecticut agency instructions for your vehicle, endorsements and application. Our federal study sets do not copy state exam questions or supply unprinted exam figures.
Before booking the exam, check Connecticut CDL application steps and official fee lines.
| Test | Questions | To pass | Official source |
|---|---|---|---|
| General knowledge | 50 questions | 40 correct | State source |
| Combination vehicles, for Class A | 20 questions | 16 correct | State source |
| Air brakes, if applicable | 25 questions | 20 correct | State source |
| Passenger | 20 questions | 16 correct | State source |
| Tank vehicle | 20 questions | 16 correct | State source |
| School bus | 20 questions | 16 correct | State source |
| Hazardous materials | 30 questions | 24 correct | State source |
| Doubles and triples | 20 questions | 16 correct | State source |
Connecticut language, permit and booking notes — checked 2026-11-13
DMV lists $16 for general knowledge, $5 for air brakes, $5 for combination, and $5 for each other requested endorsement. The CLP issuance fee after passing is $20. The separately listed skills-test fee is $30, paid with the application. Official source — checked .
Knowledge testing requires an appointment. If a knowledge test is failed, DMV requires a new appointment, a new commercial application and payment of the test fee again. Official source — checked .
The CLP is valid for one year from issuance. If a CDL is not obtained during that year, DMV requires passing the required tests again for a new permit. Official source — checked .
The DMV certification chart requires combination testing for Class A, air brakes when equipped, passenger testing when carrying passengers and school bus testing for school bus driving. Check the additional public passenger and hazardous-materials requirements before applying. Official source — checked .
For unknown figures, check with the Connecticut licensing agency. A blank count is not an estimate.
Federal study sets, not the Connecticut exam
Use general knowledge, air brakes, combination vehicles, and hazmat to study the federal topics. Finishing one of those sets does not mean you passed the Connecticut test.