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

Select the false statement about tractor protection valves.

2 / 40

The driver's manual advises you to disconnect the steering axle brake to keep the rig straight:

3 / 40

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

4 / 40

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

5 / 40

What is the best way to stop all skids?

6 / 40

Select how you would check the truck's slack adjusters.

7 / 40

Which of the following should you do when confronted by an aggressive driver?

8 / 40

Where should you place your warning devices if you must stop on a one-way or divided highway?

9 / 40

When transporting hazardous waste, you must:

10 / 40

You must first______to supply air to the trailer.

11 / 40

The shipping papers for hazardous materials can be found:

12 / 40

If a rider wants to bring a car battery or a can of gasoline or kerosene aboard your bus, you should:

13 / 40

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

14 / 40

For any flatbed load you must have at least ____ tie downs.

15 / 40

To be sure that air is supplied to the second trailer:

16 / 40

Five hazard classes that require placarding in any amount are ______.

17 / 40

If you are transporting cargo, you should inspect the cargo and securing devices:

18 / 40

What action should you take before driving while drowsy?

19 / 40

Class A explosives must not be transported in a combination vehicle if the vehicle includes:

20 / 40

Which contains more alcohol: a 12-ounce glass of 5% beer, a 5-ounce glass of 12% wine or a 1 1/2-ounce shot of 80 proof liquor?

21 / 40

While completing the 2nd component of the air brake check you are required to turn the electrical power on, begin fanning off the air pressure by rapidly relasing and apply the foot brake and _____.

22 / 40

How do you supply air to the trailer tanks?

23 / 40

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

24 / 40

Drivers placard their vehicle to _____ the risk.

25 / 40

While completing the 1st component of the air brake check you are required to fully push down on the foot brake and _____.

26 / 40

When checking the wheelchair lift, the things you should look for are:

27 / 40

The main reason you should pull the dolly out from under a trailer before disconnecting it from the trailer in front is:

28 / 40

You don't want to use wheel chocks when hooking a combination to a second trailer with no spring brakes. What should you do?

29 / 40

Select the statement that describes how you could damage the landing gear.

30 / 40

Select the load of the trailer that will require the shorter distance to stop.

31 / 40

For emergency braking to avoid a crash when driving a double trailer you should:

32 / 40

To avoid rollover when going through a curve, the best thing to do is:

33 / 40

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

34 / 40

Select the false statement about suspension:

35 / 40

Select the true statement about empty trucks:

36 / 40

What is incorrect concerning disruptive passengers?

37 / 40

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

38 / 40

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

39 / 40

How often should you check the cargo you are transporting?

40 / 40

The system that needs to be checked for signs of leaks with rust or carbon soot and damage is the _____.

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.