How Many Questions Are on the Connecticut CDL General Knowledge Test?
50 questions. That count is fixed by 49 CFR Part 383, the same across every state — Connecticut DMV administers the federal format rather than writing its own.
What Connecticut actually controls
The federal government owns the question count and 80% threshold. Connecticut's own contribution is a $16 knowledge-exam fee and a $10 charge for the learner's permit itself, both collected at the test site.
Depending on the class and endorsements pursued, additional tests — like Air Brakes or Combination Vehicles — may also apply on top of the General Knowledge test.
A CLP that lasts longer than most states allow
Once issued, a Connecticut CLP stays valid for a full year — considerably longer than many states' 60-to-180-day windows.
Miss that year without completing your CDL, though, and every required test has to be retaken to get a new permit.
How our practice tests are structured
Our practice tests break results down by topic immediately, so a weak spot doesn't stay hidden inside an otherwise decent overall score.
Each question includes an explanation and a source reference, so you learn why an answer is correct instead of just memorizing a letter.
Frequently Asked Questions
How many questions are on Connecticut's CDL General Knowledge test?
50 questions, the federally standard length used nationwide, not a Connecticut-specific number.
What does the Connecticut CDL process cost?
$16 for the knowledge exam and $10 for the learner's permit.
How long is a Connecticut CLP valid?
One year from issuance — if you don't get your CDL in that time, you must retake all required tests.
Ready to put this into practice?
Start a free Connecticut cdl practice testLast reviewed: 2026-07-22