General Knowledge Practice Test
To get a CDL and drive any type of commercial vehicle, you must take and pass the General Knowledge test. You'll be tested on general trucking knowledge, driving safely and transporting cargo safely, taken from sections 1, 2, and 3 of your state CDL manual. Once again, you MUST pass the official state CDL General Knowledge exam to get your CDL.
Try our free online CDL general knowledge test. It's an absolutely free practice exam for you before you take the real exam found at your state's local DMV testing center to help get your CDL permit. Take this CDL practice test to supplement your truck driver training class and go for a perfect score! Come back as many times as you like to try our other practice exams!
Endorsement Test Overview
You also must pass endorsement tests depending on the type of CMV that you will be driving. The endorsement tests are described below.
Tank endorsement – to drive a commercial tank vehicle (over 26,000 pounds) designed to transport any liquid or gaseous material within a tank that is permanently or temporarily attached to the vehicle or chassis. Does not include portable tanks having a rated capacity under 1,000 gallons.
Double and triple trailer endorsement – to pull double and triple trailers.
Passenger endorsement – to drive any vehicle, except a school bus, designed to carry 16 or more persons, including the driver.
School bus endorsement – to drive a vehicle designed to carry 16 or more persons, including the driver that is marked with or displays the words “school bus” and is used to transport students to or from school and may be used to transport students to or from authorized school activities. A school bus manufacturer, dealer or mechanic is not required to have the endorsement while operating a school bus that is not transporting students. A driver must qualify for a passenger endorsement before obtaining a school bus endorsement.
Hazardous materials endorsement – to drive any vehicle carrying hazardous materials that require placards or transporting any amount of material listed in the Federal Department of Health and Human Services regulations as a select agent or toxin.
Our Other 2021 CDL Practice Test
You must pass endorsement tests depending on the type of CMV that you will be driving. The endorsement tests are described below.
Combination Vehicles Practice Test - To drive a commercial vehicle and pull any kind of trailer, you must pass the Combination Vehicles written CDL exam. Combination vehicles are usually heavier, longer, and require more driving skill than single commercial vehicles. This means that drivers of combination vehicles need more knowledge and skill than drivers of single vehicles. You must understand the important safety factors that apply specifically to combination vehicles.
Airbrakes Practice Test - If you plan on driving any CMV equipped with air brakes, you must take and pass the air brakes test to remove the air brakes restriction from your CDL. The air brakes test is different than the endorsement tests because the air brakes test works as a restriction instead of an endorsement. If you do not pass the air brakes test, your CDL will bear a mark of restriction which means that you are not authorized to drive a CMV with air brakes.
Double & Triple Endorsement Test - Before you start on any doubles and triples practice tests, you need to have your commercial driver's license first. Some states allow you to get both the commercial license and the T-endorsement at the same time, but most do not. Therefore, it's best to get your commercial license first, and then go for the double/triples trailer endorsement test (or check to see if you even need the endorsement).
Tanker Endorsement Tests – If you have the desire of hauling tankers you need the tanker endorsement on your CDL. Like the doubles and triples endorsements the tanker endorsements can open a new world of opportunity for you as a driver. So, do yourself a favor and study for the test and take it so you can get your tanker endorsement that you could need to further your career or even get started on what could be a new exciting and lucrative career.
Hazardous Materials Endorsement Tests – Commercial drivers need to be qualified to deal with potentially hazardous spills and situations. If you are driving large vehicles that require a CDL license and a Hazmat endorsement there is a good chance that you will be dealing with hazardous materials. Knowing how to deal with these situations will keep you and the general public safe, as well as know how to react accordingly should a hazardous situation ever present itself.
Passenger Endorsement Tests – Bus drivers must have a commercial driver license if they drive a vehicle designed to seat more than 16 or more persons, including the driver. Bus drivers must have a passenger endorsement on their commercial driver license. To get the endorsement you must pass a knowledge test on Sections 2 and 4 of your CDL handbook. (If your bus has air brakes, you must also pass a knowledge test on Section 5.) You must also pass the skills tests required for the class of vehicle you drive.
School Bus Endorsement Test – This test is for anyone who operates a school bus (with passengers) when on the job.This would include public and private school employees transporting students from home to school, school to home, and school-sponsored events. A school bus permit is no longer enough. Therefore, the endorsement is required for most school bus drivers. It is recommended that those who need the endorsement prepare by using our school bus practice tests.
Pretrip Practice Test - Passing the CDL pre trip inspection is required before you can climb behind the wheel to demonstrate your driving skills during a CDL exam. Not only do you need to know what areas and parts to inspect, you need to note the item’s condition during CDL pre trip test. Depending on the state where you are CDL testing, there could be 100 or more inspection items to know by heart.
Texas Special Requirments Practice Test - In order to get your Commercial Learner's Permit (CLP) or Commercial Driver's License (CDL) in Texas, you'll first need to pass the Special Requirements Test. It's Texas-specific (other states don't have this requirement) and you'll need to pass it before you are allowed to proceed with other exams at the TX DMV. The Special Requirements Test is based on Section 14 of the Texas Commercial Motor Vehicle Handbook. That section contains tons of technical details that you'll have to remember.