illinois
CDL Practice Test

3

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 does outage mean?

2 / 40

When should you not use the parking brakes?

3 / 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.

4 / 40

When arriving at the destination announce:

5 / 40

Wet brakes can cause _____.

6 / 40

Air tanks need to be drained:

7 / 40

When transporting hazardous loads, you must check the tires at least:

8 / 40

You should never brake and should rely only steering inputs to avoid a crash while driving a tanker truck.

9 / 40

What is the standee line?

10 / 40

The gauge that indicates normal or increasing lubrication pressure to prevent engine seizure, failure or breakdown is:

11 / 40

The sliding mechanism and locking device for a tandem axle on trailers is:

12 / 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?

13 / 40

You should follow the posted speed limits for curves and be aware of:

14 / 40

To test the tractor-trailer connection for security, you should:

15 / 40

Select the true statement in regards to brake drums:

16 / 40

The minimum tire tread depth for front tires is:

17 / 40

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

18 / 40

Select the first action to do when the low air pressure warning comes on:

19 / 40

Select the true statement in regards to what the fifth wheel should be checked for.

20 / 40

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

21 / 40

Bus drivers must have a CDL if they drive a vehicle:

22 / 40

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

23 / 40

Water is drained from the compressed air tanks because:

24 / 40

Start by___when coupling.

25 / 40

Play of the steering wheel should not exceed:

26 / 40

What will occur if you cross the connect the air lines?

27 / 40

What is a common cause of tire fires?

28 / 40

Which of the following must be closed while the bus is in motion?

29 / 40

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

30 / 40

What should you hear when you test the trailer brakes by opening the service air line at rear of trailer with the hand valve on?

31 / 40

Which hazard classes must you NEVER smoke, or perform any activity involving fire, within 25 feet of?

32 / 40

You should_____when the low pressure warning is activated:

33 / 40

You should check that the following makes an audible noise:

34 / 40

Select the statement that is true in regards to managing space to the sides.

35 / 40

Carry-on baggage cannot be stored:

36 / 40

Which is more likely to tip over due to the crack the whip effect?

37 / 40

Do not tow or push a disabled bus with riders aboard the vehicle, unless:

38 / 40

You should follow behind other vehicles ______when traveling under 40 mph.

39 / 40

If your bus is equipped with an emergency exit door, it must:

40 / 40

In what position should the shut off valves on a the rear of the front trailer be in on a set of double trailers?

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.