CDL Test Topics

All drivers of Commercial Motor Vehicles (CMV’s) are required to obtain a Commercial Driver License (CDL).  In order to get a CDL, you must first take and pass required knowledge and skills test.  This course is designed to help you pass the CDL knowledge tests.

This course is composed of multiple practice exams for the each part of the CDL knowledge tests (the general knowledge test, the air brakes test, and the endorsement tests).  Each of the practice exams will have approximately the same number of questions, in the same format, as your actual exam.  Each of the practice exams will require a passing score of 80% just like the real exam's CDL course helps you obtain the following CDL classifications.

License Classifications

Class A (Combination Vehicle) CDL – You may drive any vehicle or combination of vehicles of any size.
Class B (Heavy, Straight Vehicle) CDL  - You may drive any single vehicle regardless of weight. You may tow a trailer if the trailer’s gross vehicle weight rating (GVWR) is not more than 10,000 pounds. If the trailer you are towing has a GVWR of more than 10,000 pounds, and the combined vehicle weight rating is more than 26,000 pounds, you will need a Class A CDL.
Class C (Smaller Vehicle) CDL  - You may drive any vehicle designed to transport 16 or more passengers, including the driver, if the GVWR is less than 26,001 pounds and you have a passenger endorsement. A Class C CDL also lets you drive any vehicle used to transport hazardous materials if the GVWR is less than 26,001 pounds and you have the proper endorsement.

Your state may have additional definitions of Commercial Motor Vehicles (CMV’s).

Endorsement Test Overview

You 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.

Air Brakes Test Overview

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 drove a CMV with air brakes.