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

What will probably happen if the converter dolly is still under the second trailer and the pintle hook is unhooked?

2 / 40

A safe haven is:

3 / 40

One reason hauling liquids in tank vehciles require special care is:

4 / 40

Placarded vehicles must carry which type of fire extinguisher?

5 / 40

How can you determine if your vehicle is equipped with ABS?

6 / 40

At the end of each shift you should:

7 / 40

The container for the mechanism that transforms the steering column action into wheel action is:

8 / 40

A tractor should not be backed under a trailer until the whole air system is:

9 / 40

What is the stopping distance for a tractor trailer that is traveling at 55 mph on dry pavement?

10 / 40

A driver of a tanker should use an escape ramp when _____.

11 / 40

When should the trailer hand valve be used?

12 / 40

You should_____when an emergency requires you to quickly stop your tanker.

13 / 40

Select the true statement:

14 / 40

The 3 parts of the air brake system are: service brakes, parking brakes, and ____.

15 / 40

What does outage mean?

16 / 40

You should have the fifth wheel plate greased as recommened because:

17 / 40

If there is rust around the nuts, what may it indicate?

18 / 40

What are some things you should check on the front of your vehicle when doing the walk-around inspection?

19 / 40

A tank vehicle:

20 / 40

You are checking the_______when looking at the dipstick to see if the lubrication is at the safe operating range or above the refill line.

21 / 40

What do you do first during step 3 of starting the engine and inspecting the inside of the cab?

22 / 40

Always try to back toward the driver's side because

23 / 40

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

24 / 40

What does the amount of liquid you can carry depend on?

25 / 40

The best way to test if the spring brakes come on automatically is to:

26 / 40

Select the situation in which you should use the hand valve to park a combination vehicle.

27 / 40

Select the true statement in regards to driving a truck with triple or double trailers:

28 / 40

You should_____when the low pressure warning is activated:

29 / 40

What must vehicles with air brakes have?

30 / 40

What is the benefit of ABS?

31 / 40

If you are driving a 100-foot truck with double trailers at 30 mph in dry conditions, how many seconds of space should there be between your truck and other vehicles?

32 / 40

The trailer should be lowered so that _____.

33 / 40

What is the movement of the liquid called when the tanks are partially filled?

34 / 40

How often should you check the tires if your placarded trailer has dual tires?

35 / 40

An "A/W" the first column of the hazardous materials table means:

36 / 40

______is a device that connects the service and emergency air lines between the tractor and trailer.

37 / 40

Which of the following statements about overhead space is true?

38 / 40

To inspect the______you should pump the pedal 3 times and hold it down for 5 seconds while making sure the pedal doesn't move during those 5 seconds.

39 / 40

You should back up slowly until____when coupling the trailer.

40 / 40

The best way to have control on curves is:

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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.