A passenger endorsement test is required to drive a vehicle for 16 or more passengers, of which there are 20 questions.On this test, there are 30 questions, and you must complete the endorsement test every time you renew your CDL.

A hazardous materials test is required for marked vehicles.

The tank endorsement test is required to drive a vehicle with a liquid storage tank.

20-question doubles/triple endorsement test required if you operate these trailers.

Air brakes test required if the vehicle test is required to drive combination vehicles.

The 30-question general knowledge test required for all applicants.

The knowledge and individual endorsement tests will include:: Online CDL tests are available that provide sample questions from the Illinois CDL exams. We highly encourage all truck drivers to study thoroughly for the written tests for this will cut down on the time you stand in line at the DMV office and help ensure your success on test day. This is required for Farm Operators, Fire Fighting Equipment Operators, Recreational Vehicle Operators, Military Vehicle Operators, and Township Employees. Though some of the following vehicle operators are not required to obtain CDLs, they are required to hold proper driver's license classification for the type of vehicle that they are operating. In accordance with state and federal law, some drivers are not subject to the requirements of the CDL program.

Farm-related Restricted CDL - This seasonally restricted CDL can be issued for a period between 90 and 180 days, in any one-year period, which is valid within 150 miles of the employer's place of business.

These vehicles do not meet the criteria for Class A or B, and fall under this classification.

Class C License - Class C licensing is pertinent to vehicles designed to transport 16 or more passengers, including the driver, as well as vehicles marked for hazardous materials.

Vehicles in tow may not exceed 10,000 pounds, however. Class B License - A Class B endorsement is necessary for vehicles where the GVWR of the single vehicle exceeds 26,000 pounds.Class A License - This classification applies only to 'combination' vehicles with a Gross Combination Weight Rating (GCWR) exceeding 26,000 pounds, provided that the Gross Vehicle Weight Rating (GVWR) of the vehicle being towed exceeds 10,000 pounds.To drive commercial vehicles that fall into one of the following classifications, you must possess an Illinois CDL: Commercial licenses, in addition to certain endorsements, are required for double/triple trailers, tankers, passenger vehicles, and vehicles marked for hazardous materials. If you live in Illinois, and drive a Class A, B, or C commercial vehicle, you must possess an Illinois CDL.

Illinois class c license practice test