How Many Questions Are on the Mississippi CDL General Knowledge Test?
50 questions. That count is fixed by 49 CFR Part 383, the same across every state — Mississippi's DPS administers the federal format rather than writing its own.
Three separate fees, not one bundled charge
The federal government owns the question count and 80% threshold. Mississippi's own arrangement splits the cost into three pieces: a $25 CDL application fee, a $16 CLP fee, and a $5 charge for each knowledge-test attempt.
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 full hour, a full year
You get a full hour to complete the 50-question test — a generous window compared to some states' shorter time limits.
Once issued, a Mississippi CLP stays valid for 12 months, though you still have to wait at least 14 days before scheduling the skills test.
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 Mississippi's CDL General Knowledge test?
50 questions, the federally standard length used nationwide, not a Mississippi-specific number.
What does the Mississippi CDL process cost to start?
A $25 application fee, a $16 CLP fee, and $5 per knowledge-test attempt — three separate charges rather than one bundled fee.
How long do I have to finish the knowledge test?
One hour.
Ready to put this into practice?
Start a free Mississippi cdl practice testLast reviewed: 2026-07-23