Connecticut CDL Practice Test and Test Prep (2026)
Connecticut gives CDL tests through Connecticut Department of Motor Vehicles (DMV). Here is what you will be tested on, which of our practice quizzes match each test, and what the skills test involves in Connecticut.
Knowledge tests for a Connecticut permit
- General Knowledge (all applicants) — 50 questions, 40 correct to pass — practice General Knowledge (60 questions)
- Air Brakes (if the vehicle has air brakes) — 25 questions, 20 correct to pass — practice Air Brakes (40 questions)
- Combination Vehicles (Class A) — 20 questions, 16 correct to pass — practice Combination Vehicles (30 questions)
- Passenger (P) — 20 questions, 16 correct to pass
- School Bus (S) — 20 questions, 16 correct to pass
- Hazardous Materials (H) — 30 questions, 24 correct to pass
Permit minimum age: 18 (in-state driving) or 21 (interstate). Holding period before the skills test: 14 days. Permit validity: 365 days.
Connecticut endorsement tests and practice
- Hazmat (H) practice
Connecticut notes for this endorsement
Connecticut is NOT one of the eight TSA self-managed hazmat states, so hazmat uses the standard federal process: pass the hazmat knowledge test, then complete the TSA Security Threat Assessment (fingerprints/background check) through the Universal Enrollment Services vendor (IDEMIA/IdentoGO) at universalenroll.dhs.gov — not at the DMV. The published TSA application and fingerprint fee is about $85.25 (confirm current amount with TSA/IdentoGO). Minimum age 21.
- Tanker (N) practice
Connecticut notes for this endorsement
Tank vehicle endorsement — $5 knowledge test.
- Passenger (P) practice
Connecticut notes for this endorsement
Passenger endorsement; requires ELDT for first-timers and a passenger-vehicle skills test.
- School bus (S) practice
Connecticut notes for this endorsement
School bus endorsement; requires the P endorsement plus school-bus ELDT and testing.
- Doubles/triples (T) practice
Connecticut notes for this endorsement
Double/triple trailers (Class A); knowledge test only, no separate skills test.
The Connecticut skills test
Components: Pre-trip / vehicle inspection, Basic control skills (static/off-road course), On-road driving test.
Test vehicle: You must supply your own representative commercial vehicle for the class you're testing for; the DMV does not provide a test vehicle. The vehicle cannot carry loaded cargo, cannot bear farm/transporter/dealer/repairer plates, cannot use a truck-tractor to represent a Class B, and a trailer cannot exceed 48 feet.
Where and how to book: Connecticut's official CDL pages describe skills testing administered by the DMV's Driver Examination / Testing Unit (DETU), not third-party testers. After holding your CLP at least 14 days, submit Form R-405 by email to [email protected] (the DMV provides a test date within about three business days) — some materials also list a scheduling line at (860) 263-5096. If Connecticut has approved any third-party skills examiners, confirm directly with the DMV.
Waits and retests: Skills testing is by appointment through DETU and the appointment system is updated in real time; specific wait times vary by location and season and are not published — confirm current availability with the Connecticut DMV.
Practice the inspection part with our pre-trip inspection guide. Research dated 2026-10-12; confirm testing details with Connecticut.
All practice tests
- General Knowledge (60 questions)
- Air Brakes (40 questions)
- Combination Vehicles (30 questions)
- Hazardous Materials (H) (30 questions)
- Tank Vehicles (N) (25 questions)
- Passenger (P) (25 questions)
- School Bus (S) (25 questions)
- Doubles/Triples (T) (20 questions)
Ready to apply? See the full Connecticut CDL requirementsor build your Connecticut checklist.