How Many Questions Are on the Kentucky CDL General Knowledge Test?
50 questions. That count is fixed by 49 CFR Part 383, the same across every state — Kentucky State Police administers the federal format rather than writing its own.
What Kentucky actually controls
The federal government owns the question count and 80% threshold. Kentucky's own contribution is the $11 CLP fee ($14 for a REAL ID version), among the lowest nationally, and a 180-day CLP validity period, longer than many states allow.
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 outlasts most states' versions
Once issued, a Kentucky CLP stays valid for 180 days, and knowledge test scores remain good for the entire period — a real advantage over states with a 60-day window.
Federal rule still requires holding the CLP for at least 14 days before applying for the full CDL, so even the shortest possible Kentucky timeline leaves comfortable room.
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 Kentucky's CDL General Knowledge test?
50 questions, the federally standard length used nationwide, not a Kentucky-specific number.
What does the Kentucky CLP cost?
$11 standard, or $14 for a REAL ID version.
How long is a Kentucky CLP valid?
180 days — longer than many other states' CLP windows.
Ready to put this into practice?
Start a free Kentucky cdl practice testLast reviewed: 2026-07-22