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

_____ create a little above 90 degree angle between the adjuster arm and push rod when the brakes are released and no less than 90 degrees when the brakes are applied.

2 / 40

Cargo tanks ____.

3 / 40

It is very important that you never smoke around which hazard classes?

4 / 40

What should you do if the low air pressure warning comes on for only one system in a truck or bus that has a dual air brake system?

5 / 40

How do you supply air to the trailer tanks?

6 / 40

In the slide mechanism of the sliding fifth wheel, this object should have no missing pins or be loose when fully engaged.

7 / 40

A slack adjuster is:

8 / 40

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

9 / 40

You are inspecting the_____when looking for broken welds, cracks, holes, or other damage to the longitudinal frame member, cross members, box, and floor.

10 / 40

At what pressure is the safety valve in the air compressor tank set to open?

11 / 40

Which seats not securely fastened to the bus are usually allowed?

12 / 40

As the driver of a bus, how can you best avoid hindering other traffic on the highway?

13 / 40

Select what you should not do when coupling the glad hands.

14 / 40

Do converter dollies have spring brakes?

15 / 40

If you must stop on the shoulder of the road, you should place warning devices at all of the following places except...

16 / 40

How do you check the coolant level?

17 / 40

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

18 / 40

The object that doesn't get checked at the side of the trailer is the:

19 / 40

Select the false statement about tractor protection valves.

20 / 40

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

21 / 40

Select which is not an engine compartement belt:

22 / 40

The Emergency Response Guide, ERG, can best be explained as _____.

23 / 40

After coupling with a trailer, what position should the front trailer supports be in before driving away?

24 / 40

With Division 1.2 or 1.3 Explosive B, how close to the travelled part of the roadway can you park?

25 / 40

Where can you find a shipper’s certification?

26 / 40

Select the true statement in regards to brake drums:

27 / 40

What do yo need to do before supplying air to the air tanks of the second trailer?

28 / 40

Who is responsible for packaging, labeling, and preparing the hazardous material shipping papers for a common carrier?

29 / 40

Select the true statement about handling triples and doubles:

30 / 40

This should be cleaned and then adjusted properly while inside the cab.

31 / 40

While completing the 3rd component of the air brake check of a combination vehicle, at what psi should the tracor protection valve and parking brake valve should pop out?

32 / 40

You are driving a 40 foot truck at 35 MPH, how much space (in seconds) should you keep in front of you?

33 / 40

If your engine runs a pump used during delivery of compressed gas, should you turn off the engine before or after unhooking hoses after delivery?

34 / 40

Select the true statement about dual air brake systems:

35 / 40

You can be sure air is supplied to the second trailer by:

36 / 40

What are shippers trying to accomplish when they package the material?

37 / 40

The best way to test the low air pressure warning signal is to:

38 / 40

Which of the following answers lists the three types of emergency equipment you must have on your bus?

39 / 40

Select the true statement in regards to your brake function when your ABS fails

40 / 40

A tank trailer should never be fully loaded due to:

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.