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

Start by___when coupling.

2 / 40

What should you hear when you test the trailer brakes by opening the service air line at rear of trailer with the hand valve on?

3 / 40

What is the brake system that applies and releases the brakes when the brake pedal is used?

4 / 40

Puddles or dripping fluids from the underside of the transmission and engine may indicate:

5 / 40

Select the true statement in regards to when a bulk tank vehicle stops at an intersection on a slippery surface:

6 / 40

You should back up slowly until____when coupling the trailer.

7 / 40

Select the true statement about handling triples and doubles:

8 / 40

A safe haven is:

9 / 40

Shifting into a lower gear and removing your foot off of the accelerator to slow your vehicle is known as?

10 / 40

Two causes of tire fires are ______.

11 / 40

What are the three types of emergency equipment that you must have with your vehicle?

12 / 40

Cargo tanks are:

13 / 40

When must a driver’s inspection report be completed?

14 / 40

Which of the following is something the driver must watch for:

15 / 40

In safe driving, what does communicating mean?

16 / 40

This object should not be spliced, cut, chafed, or worn through to allow steel braid to show.

17 / 40

Select the statement that is true in regards to quick steering movements and triple/double trailers:

18 / 40

If there is no traffic light or attendant, how far from the draw of a drawbridge must you stop?

19 / 40

Do you need to stop before a railroad crossing if you are hauling 100 pounds of Division 4.3 Dangerous When Wet material?

20 / 40

Select the statement that tells you how you can check the low pressure warning signal.

21 / 40

When would a drive-wheel skid result in a jackknife when pulling doubles?

22 / 40

At a railroad crossing, the bus is required to stop at the stop line. If there is no clearly marked stop line, what is the required minimum and maximum stopping distance?

23 / 40

Which of the following types of cargo must never be carried on a bus with passengers?

24 / 40

A drawbridge does not have a traffic light showing green or a traffic control attendant. How many feet before the draw of a bridge must a bus driver stop?

25 / 40

How do you make sure the air lines are not crossed and the trailer brakes are working after supplying air to the trailer?

26 / 40

Which trailer is most likely to turn over when you make a sudden turn while pulling doubles?

27 / 40

If the hazardous materials are classified as FORBIDDEN you should:

28 / 40

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

29 / 40

How much space should you see between the lower and upper fifth wheel when checking the coupling of a converter dolly?

30 / 40

You need to be extra careful when driving smooth bore tanks:

31 / 40

Mirrors with a convex surface or "spot" mirrors _____.

32 / 40

At around____the governor allows the air compressor to start pumping again:

33 / 40

The manual says you should look _____ ahead while driving.

34 / 40

This object should not move more than an inch by pulled by hand with the brakes released for manual slack adjusters.

35 / 40

Which of the following would NOT be part of a standard vehicle inspection?

36 / 40

Select the true statement in regards to unhooking the pintle hook while the converter dolly is still under the trailer.

37 / 40

What does the drain valve for air tanks remove?

38 / 40

To transport cargo safely, which of these are you NOT responsible for?

39 / 40

What will happen right away should the service air line come apart but the emergency line is intact while driving a combination vehicle?

40 / 40

The walls that separate compartments inside the tanks and having openings at the top and bottom are called:

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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.