illinois
CDL Practice Test

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Welcome to the Illinois CDL Practice Test site. This is a free site and you are able to take the tests as a study guide as you prepare for the Illinois CDL test. The topics covered in these practice tests are taken from the Illinois CDL book. You will be presented with 40 questions and you must answer 34 questions correctly to pass. There is a 50-minute time limit. You may not go back once you answer a question. Click the "Start Test" button below to begin. 

1 / 40

If you are required to stop at railroad crossings, you must:

2 / 40

How far before a railroad crossing should you stop your bus?

3 / 40

The safety valve is usually set to open at:

4 / 40

There are 2 reasons as to why hauling liquids take special care. One reason is the ___center of gravity.

5 / 40

Select the true statement in regards to the center of gravity for tanks:

6 / 40

Select how brakes work on long, steep downgrades:

7 / 40

When backing, what is the best method to use to avoid blind spots?

8 / 40

When accelerating:

9 / 40

The designation RQ identifies the material's:

10 / 40

How many different hazard classes are there?

11 / 40

The pintle hook should be_____ and the converter dolly air tank drain valve is___when doing a walk around inspection of a triple or double trailer.

12 / 40

Urban mass transit coaches may have a brake and accelerator interlock system. Which of the following statements is true?

13 / 40

The belt that you need to make sure is securely mounted, without frays, and adjusts and latches properly is the:

14 / 40

When should air tanks be drained?

15 / 40

Select the statement that is true in regards to what is required of a driver with a double or triple trailers:

16 / 40

Make sure that_____before you back under a trailer.

17 / 40

Which of the following will confirm that you are driving with anti-lock brakes?

18 / 40

Drivers who transport route controlled radioactive materials must carry a dated certificate of radioactive materials training. This training must have ocurred within the last:

19 / 40

If you are traveling at 55 mph in a 30-foot vehicle, you should leave how many seconds of following distance?

20 / 40

Which of the following must be closed while the bus is in motion?

21 / 40

Suspension systems:

22 / 40

There must be a hazardous materials identification number on the ______ and on the ______.

23 / 40

The two other places where the hazardous identification number must appear are:

24 / 40

____is what can legally hold the parking brake or emergency brake in position for a bus, truck, or truck tractor.

25 / 40

The safety catch for the fifth wheel locking lever must be ____ for a coupling to be complete.

26 / 40

The method used to make sure the spring brakes will come on automatically is to:

27 / 40

Liquid surge affects the handling of a tanker by:

28 / 40

This object should not be damaged, bent, or rusted through and be evenly centered with the tires and dual wheels evenly separated.

29 / 40

Which of the following should you do when driving the school bus in high wind?

30 / 40

The cause of almost half of all truck driver deaths are:

31 / 40

What is the earliest way to notice a trailer skid?

32 / 40

Which two special conditions indicate that you should downshift?

33 / 40

What should you do before you begin to couple?

34 / 40

In Column 1 the symbol "I" means:

35 / 40

Tires should should be replaced:

36 / 40

Select the true statement in regards to brake drums or discs:

37 / 40

What is most likely to occur when driving a set of doubles and a set of trailer wheels goes into a skid?

38 / 40

Why should you test the tractor protection valve?

39 / 40

Air tanks need to be drained:

40 / 40

When this item is missing or loose, movement may occur between the fifth wheel assembly and the frame.

Your score is

The average score is 60%

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CDL Category Practice Tests

CDL Practice Test

How To Get An illinois Commercial Drivers License

Applicants can apply for their CDL and any endorsements they wish at the age of 21 years old. Those under the age of 21, but over the age of 18 are eligible to receive an in-state only CDL. Those under 21 are not eligible for driving hazmat vehicles or transporting passengers. All applicants must supply a Department of Transportation (DOT) medical certificate and pass the CDL vision test in order to be qualified to receive their CDL. All applicants are required to pass a vision test, knowledge test(s), and a practical skills assessment in order to be considered for a CDL license.

Any applicant that is described by any of the sentences below is considered disqualified from getting their CDL.

  • A driver that has their commercial driving privileges revoked in another state.
  • Any driver convicted of driving impaired in a commercial vehicle in the past 24 months.
  • A driver that possess more than one driver’s license.
  • Any driver whose license is currently denied, canceled, suspended, or revoked.

Endorsements
L – Air Brake Restriction
X – Combination
P – Passenger
C – Charter Bus
T – Doubles/Triples
H – Hazardous Materials
S – School Bus
N – Tank

Hit the Open Road

illinois CDL License Test Tips

The written exam or knowledge test is required of all CDL applicants. This exam is comprised of 50 specific questions about commercial driving. Those applying for endorsements must complete an additional knowledge test for that endorsement. These tests are between 20 and 30 questions. Those who are applying for a Class A CDL must complete an additional 20 questions about combination vehicles. All knowledge tests must be passed with a grade of 80 percent or more for an applicant to receive their CDL permit.

The Illinois CDL skills assessment must be completed by an applicant. Each assessment includes a pre-trip inspection, basic control skills, and on-road driving test. The on-road driving test includes real-life driving instances, such as low clearance bridges, downgrading for a stop, increasing gears, curves, expressways, and other instances. These are mean to ensure the applicant is fully capable of driving a commercial vehicle safely.

Additional Information

Information on the Office of the Illinois Secretary of State

The Office of the Illinois Secretary of State is responsible for the administration of the CDL requirements and testing in Illinois. To get more information contact them via:

Website:  https://www.cyberdriveillinois.com/departments/drivers/drivers_license/CDL/cdl.html

Phone:  800.252.8980

 

Additional Illinois CDL Helpful Links

Please use the links below to access more valuable Illinois CDL testing resources and to learn more about practice driving tests for the state of Illinois.