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

Two causes of tire fires are ______.

2 / 40

To find out if a shipment includes a hazardous material, you should:

3 / 40

Which trailer should be the first one after the tractor?

4 / 40

After the initial drop, the maximum leakage rates per minute is:

5 / 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?

6 / 40

In what position should the converter dolly air tank drain valve be in for double trailer combination?

7 / 40

Select the definition for outage:

8 / 40

What is the best way to prevent brakes form overheating while drive down a steep grade?

9 / 40

Select what you should do before leaving the vehicle unattended:

10 / 40

Remember to_____when steering to avoid a crash while driving doubles.

11 / 40

Select the reason as to why air tanks need to be drained:

12 / 40

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

13 / 40

When transporting hazardous loads, you must check the tires at least:

14 / 40

What gauge on the dashboard indicates electrical system charging rate?

15 / 40

Select the statement that best describes what the trailer air supply control does:

16 / 40

A hazard class that uses transport indexes to determine the amount that can be loaded in a single vehicle is _____.

17 / 40

This object should be clean with no obstructions, illegal stickers or damage to the glass.

18 / 40

Rods, connecting links, and arms from the steering box to the wheel are a part of the:

19 / 40

The best way to describe a dual air brake system is:

20 / 40

It is important to know the outage required for the liquids you carry because:

21 / 40

What is a common cause of tire fires?

22 / 40

Select the true statement about handling triples and doubles:

23 / 40

In what position should the shut off valves on a the rear of the front trailer be in on a set of double trailers?

24 / 40

Select how brakes work on long, steep downgrades:

25 / 40

A shipper’s certification is best described as _____.

26 / 40

At the end of each shift you should:

27 / 40

When should you not use the parking brakes?

28 / 40

If you park the trailer at an angle to the tractor when uncoupling:

29 / 40

What is the value of the overhead rear-view mirror inside of the bus?

30 / 40

To test the tractor-trailer connection for security, you should:

31 / 40

What are some of the important parts in the steering system?

32 / 40

Select the true statement about what the Air Compressor Governor controls:

33 / 40

You must be alert for road hazards so that:

34 / 40

You should be in the proper gear before going down a hill because:

35 / 40

Which of the following is not a prohibited practice on the bus:

36 / 40

Select the true statement in regards to the liquid inside of a bulk tank causing a tank truck to roll sideways.

37 / 40

When should you avoid using the parking brake?

38 / 40

Select the action that is not recommended when driving on slippery roads:

39 / 40

You should____in order to inspect the coupling.

40 / 40

Anti-lock brakes:

Your score is

The average score is 60%

5/5 - (2 votes)

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.