Master the Mississippi CDL Knowledge Test
Welcome to your all-in-one guide for the Mississippi Commercial Driver's License (CDL) knowledge tests. This interactive dashboard is designed to simplify your preparation. Here, you can explore eligibility requirements, understand the specific tests you'll need to take, follow a structured study plan, and get answers to common questions. Our goal is to provide a clear and direct path to help you succeed on test day.
General Knowledge Test
The foundational test for all CDL applicants. Covers essential safety, vehicle inspection, and driving concepts.
Passing Score: 80% (40 correct)
Endorsements
Specialized tests required for specific vehicle types or cargo, such as air brakes, tankers, or school buses.
Your First Step
Start by studying the official Mississippi CDL Manual. It is the primary source for all test questions.
Download ManualGeneral Knowledge Test: Topic Distribution
The General Knowledge test covers a wide range of topics. This chart provides an estimated breakdown of the key areas you'll be tested on, helping you focus your study time effectively. Understanding vehicle operation and safe driving practices form the core of the exam.
Eligibility Requirements
Before you can take the knowledge tests, you must meet several key requirements set by the state of Mississippi and the FMCSA. This section outlines the essential criteria for all CDL applicants. Ensuring you have all necessary documents and qualifications ready will streamline the application process.
Age Requirements
18 years or older to drive commercially within Mississippi (intrastate).
21 years or older to drive across state lines (interstate) or transport hazardous materials.
Licensing & Documentation
Must hold a valid, non-CDL Mississippi driver's license.
Provide proof of U.S. citizenship or lawful permanent residency.
Provide proof of Mississippi residency.
Medical Certification
You must pass a DOT medical examination conducted by a certified medical examiner. You will receive a Medical Examiner's Certificate, which you must carry with you.
Driving Record Check
Your driving record for the past 10 years will be checked across all 50 states.
CDL Knowledge Test Breakdown
Passing the CDL knowledge tests is a critical step towards getting your Commercial Learner's Permit (CLP). The process starts with the General Knowledge test, which is mandatory for all applicants. Afterward, you'll take additional tests for any specific endorsements you need. This section breaks down the details for each test, including the number of questions and the score required to pass.
General Knowledge
Required for all CDL applicants. Covers vehicle inspection, basic control, safety, and emergency procedures.
50 Questions
Pass with 40 or more correct (80%)
Combination Vehicles
Required for Class A. Covers coupling/uncoupling, air lines, and handling combination vehicles.
20 Questions
Pass with 16 or more correct (80%)
Air Brakes
Required for any vehicle with air brakes. Covers air brake systems, parts, and proper usage.
25 Questions
Pass with 20 or more correct (80%)
Hazardous Materials (H)
Required to transport placarded hazardous materials. Covers regulations, placards, and safety.
30 Questions
Pass with 24 or more correct (80%)
Tank Vehicles (N)
Required for hauling liquids or gases in tanks. Covers surge, vehicle handling, and regulations.
20 Questions
Pass with 16 or more correct (80%)
Passenger Transport (P)
Required to drive vehicles carrying 16 or more passengers. Covers passenger safety and loading/unloading.
20 Questions
Pass with 16 or more correct (80%)
School Bus (S)
Required to operate a school bus. Covers student safety, signals, and railroad crossings.
20 Questions
Pass with 16 or more correct (80%)
Doubles/Triples (T)
Required to pull double or triple trailers. Covers coupling and unique driving characteristics.
20 Questions
Pass with 16 or more correct (80%)
Your 4-Step Study Plan
A structured approach is the key to passing your CDL knowledge tests. Instead of cramming, follow this simple, effective plan to build your knowledge systematically and increase your confidence. This plan emphasizes understanding the material, not just memorizing answers.
Get and Read the Official Manual
The Mississippi CDL Manual is the ultimate source of truth. All test questions are derived directly from it. Read it thoroughly from start to finish to build a strong foundation.
Focus on Key Sections
After your initial read-through, go back and focus on the sections that apply to the license and endorsements you need. Pay special attention to areas like Air Brakes, Combination Vehicles, and Driving Safely.
Take Practice Tests
Use online practice tests to gauge your knowledge. This helps you get familiar with the question format and identify areas where you are weak. Don't worry about scores initially; focus on learning.
Review and Repeat
For every practice question you get wrong, go back to the manual and find the correct answer. Understand *why* it's correct. Repeat this cycle of testing and reviewing until you consistently score above 80%.
Frequently Asked Questions
How long is my Commercial Learner's Permit (CLP) valid for?
A CLP is valid for 180 days from the date of issuance.
Do I have to wait a certain amount of time after getting my CLP to take the skills test?
Yes. You must hold your CLP for a minimum of 14 days before you are eligible to take the CDL skills (road) test.
What happens if I fail a knowledge test?
You can typically retake the test. It's best to check with the local DPS office for specific policies on waiting periods and retake fees. Use the failure as a guide for what to study more.
Where can I find reliable practice tests?
There are many free online resources. Look for websites that specifically mention they use the official Mississippi CDL manual for their questions. While question styles are similar nationwide, it's good to focus on state-specific resources when available.
Do I need to schedule an appointment for the knowledge tests?
It is highly recommended to schedule an appointment with your local Mississippi Driver Service Bureau location to avoid long wait times. You can check their website or call for appointment details.