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

Be careful to check the_____when unloading the smaller tanks of bulk heads.

2 / 40

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

3 / 40

To test the security of the tractor semi trailer connection you should:

4 / 40

What should the driver pay special attention to when driving smaller tanks?

5 / 40

What handling effect will baffles have?

6 / 40

Why should you not use the trailer hand brake to straighten out a jack knifing trailer?

7 / 40

A battery box check is important. The battery must be secure, connection must be tight, and cell caps must be present. In addition these items should be checked:

8 / 40

Unless you_____you will feel the effects of a liquid surge.

9 / 40

The two main things to look ahead for while driving are _____.

10 / 40

Why are you required to take an exam about air brakes?

11 / 40

Check that the parking brake will hold by____when the parking brake is engaged and the trailer brakes released if not a combination vehicle.

12 / 40

When this item is missing or loose, movement may occur between the fifth wheel assembly and the frame.

13 / 40

Select the true statement about emergency brakes:

14 / 40

How do you know when your brakes are fading?

15 / 40

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

16 / 40

Select whether the following statement is true or false: Front wheel brakes are good to use in all conditions.

17 / 40

If students must cross the street, when they get off the bus, which statement is true?

18 / 40

When accelerating:

19 / 40

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

20 / 40

This gauge will indicate if the generator or alternator is charging:

21 / 40

What will happen should a driver cross the air lines when hooking up the an older trailer?

22 / 40

Which of the following three hazard classes should NOT be placed into a temperature-controlled trailer (one with a heater/air conditioner unit)?

23 / 40

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

24 / 40

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

25 / 40

What is most likely to occur when driving a tanker truck and the front wheels begin to skid?

26 / 40

When driving normally, some drivers use the hand valve before applying the brake pedal to prevent jack knifing. Select the most appropriate response to this statement.

27 / 40

To transport cargo safely, which of these are you NOT responsible for?

28 / 40

Select the true statement in regards to empty trucks:

29 / 40

Select the true statement about converter dollies:

30 / 40

The front trailer supports should be____before driving away.

31 / 40

What are spring brakes?

32 / 40

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

33 / 40

Select the true statement about empty trucks:

34 / 40

What keeps air in the tanks should the air compressor develop a leak?

35 / 40

How many seats may be placed in the aisle if the bus is a charter and is carrying agricultural (farm) workers?

36 / 40

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

37 / 40

How should you know when to shift?

38 / 40

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

39 / 40

What might happen if you swing wide to the left before you turn right?

40 / 40

Which of the following is a key steering component?

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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.