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 correct setup for shut-off valves:

2 / 40

How should the hand valve be used?

3 / 40

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

4 / 40

What is the purpose of a driver placarding his or her vehicle?

5 / 40

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

6 / 40

What do you need to do to supply air to the air tanks of the second trailer?

7 / 40

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

8 / 40

Select the factors that can cause your brakes to fade or fail:

9 / 40

The gauge that needs to come up to normal levels after starting the engine within a few seconds is _____.

10 / 40

The school bus driver may be the only contact person from school system some parents meet. The percentage of such parents is as high as:

11 / 40

In safe driving, what does communicating mean?

12 / 40

When backing your vehicle, which of the following is NOT recommended

13 / 40

You should check the_____when loading small tanks equipped with bulkheads.

14 / 40

By law, the warning lights must only be used when approaching a:

15 / 40

Select which is not an engine compartement belt:

16 / 40

Surge affects the handling of a tanker by:

17 / 40

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

18 / 40

To prevent a roll over a driver can 1) keep the cargo as low to the ground as possible and 2) _____.

19 / 40

This item does not need to be checked during the cab check.

20 / 40

How high should you crank the landing gear?

21 / 40

Make sure____when the front trailer supports are up and the trailer is sitting on the tractor.

22 / 40

Select the statement of what you should not do if you are required to drive through flowing water or deep puddles.

23 / 40

The air leakage rate for combination vehicles should not be more than _ psi a minute.

24 / 40

You should____when an emergency requires you to quickly stop due to a crash.

25 / 40

Select the true statement:

26 / 40

You should check your mirrors while making a lane change:

27 / 40

What are you checking when looking at the lubrication level on a dipstick?

28 / 40

You should line up_____when getting ready to back under the trailer.

29 / 40

Your engine runs a pump when you are delivering compressed gas. Should you turn off your engine before or after you unhook the hoses after finishing that delivery?

30 / 40

Which of the following statements about the bus interior is false?

31 / 40

You must carry a gas mask with you when transporting:

32 / 40

What can you do at an accident site to help avoid another accident?

33 / 40

In the event of an accident you should remember to do the following EXCEPT:

34 / 40

How do you supply air to the trailer tanks?

35 / 40

The minimum tire tread depth for front tires is:

36 / 40

This object is not checked at the rear of the trailer.

37 / 40

Drivers who transport route controlled radioactive materials must carry a dated certificate of radioactive materials training. This training must have ocurred within the last:

38 / 40

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

39 / 40

Select the true statement about dual air brake systems.

40 / 40

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

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.