What's the Passing Score on the Connecticut CDL General Knowledge Test?
40 out of 50 — 80% — passes Connecticut's CDL General Knowledge test. The number is federal; how long you get to act on it is Connecticut's own story.
A fixed national bar, a generous state clock
49 CFR Part 383 sets the CDL general knowledge test at 50 questions and 80% nationwide — Connecticut administers that standard rather than writing its own.
Where Connecticut differs: a passing result gets you a CLP valid for a full year, not the 60-to-180-day window several other states use.
What that year actually buys you
A full year covers ELDT, scheduling a road test, and any retesting on individual sections — real breathing room compared to a tighter deadline elsewhere.
Registering with the FMCSA Drug and Alcohol Clearinghouse and completing a medical exam with a Certified Medical Examiner both still have to happen before the CLP is issued, regardless of the longer window.
Where applicants actually lose points
Numeric details are the real trap here — an air-brake PSI threshold, an hours-of-service cap, a mileage marker for a cargo recheck. None of it comes from intuition; it has to be memorized precisely.
Skimming a missed practice question's explanation just lets the same gap resurface later under time pressure — read it in full instead, every time.
Frequently Asked Questions
Can Connecticut require a higher passing score than 80% for the CDL test?
No. 49 CFR Part 383 fixes the CDL general knowledge test at 50 questions and an 80% passing threshold nationwide — Connecticut DMV administers that federal standard rather than setting its own.
How long is a Connecticut CLP valid after passing?
One year from issuance.
What score should I aim for on practice tests?
Aim for 90% or higher consistently before your appointment. That buffer above the 80% minimum accounts for first-attempt nerves.
Ready to put this into practice?
Start a free Connecticut cdl practice testLast reviewed: 2026-07-22