Free Illinois CDL General Knowledge Practice Test 2023

You are looking for actual practice for your coming CDL test? So you have come to the right place. Our IL General Knowledge Practice Test has the same questions as the real exam which is based on the Illinois CDL manual. Our CDL practice test covers most of the subject areas on the Illinois General Knowledge Test such as shifting techniques, railroad crossing safety, drunk driving laws, and much more to make you become a safer driver. In addition, each question has a detailed explanation that will help you understand the concept and answer future questions about it correctly. If you don't get the pass right away, don't worry, you can take this practice test an unlimited number of times to make sure you learn all the questions. Our Illinois CDL Practice Test will refine your driving knowledge so you can earn your CDL and start driving on the roads. Let’s take our practice test now!

Our CDL practice tests:
Based on 2021 IL commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
IL CDL General Knowledge Test format:
50 questions
40 correct answers to pass
80% passing score
List of questions
One can recognize hazardous materials by looking on the container:
How do you correct a drive-wheel acceleration skid?
When securing concrete pipe over 45 inches loaded crosswise, which direction must the tiedowns on the rear half of the load run?
Perception distance is the distance your vehicle travels from the time:
You are driving a 40-foot vehicle at 35 mph. The road is dry, and visibility is good. What is the least amount of space you should keep in front of your vehicle to be safe?
When starting a bus on a level surface with good traction there is often no need for:
If the cargo is fully contained in a sided vehicle, what is the minimum requirement for withstanding sideways force?
As the blood alcohol concentration (BAC) goes up, what happens?
A row of metal coils loaded with eyes lengthwise requires how many direct tiedowns over each side-by-side row or coil?
To stop a drive-wheel skid, you should:
When approaching a railroad crossing, which of these safety precautions applies?
You are driving a vehicle that could be driven safely at 55 mph on an open road. But traffic is heavy and other vehicles drive at the speed of 35 mph, though the speed limit is 55 mph. The safest speed for your vehicle is more likely to be:
Retreaded, recapped, or regrooved tires are allowed on the front wheels of a bus when?
Making sure that the cargo is not overweight is the responsibility of:
Drivers should be aware that convex mirrors will make reflections look:
On which of the below logs did a violation occur?

Day 1

Day 2

Why should you always plan on arriving to your destination as quickly as possible?
The 14 hour limit can be extended by:
What does emergency braking mean?
When hauling livestock, to prevent them from moving around too much and causing a dangerous situation you would use:
Distracted driving could be any of the following except:
Using the following numbers for your calculations, how much weight will come off your steer axle?

Miles per gallon: 7
Miles travelled: 280
Percenatage of fuel weight on steer axle: 80%
EOBR's are required to automatically record which of the following?
Timber used for dunnage must be all of the following except:
If you must cross into the oncoming lane to make a turn, you should:
If you are convicted for driving under the influence while driving a commercial vehicle, and this is your first offense, you most likely will get:
In addition to preventing engine freezing, proper coolant levels help:
What three distances build up the total stopping distance of your truck or bus?
Which of the following is not a requirement of wood used as blocking or bracing?
'Blocking' is defined as:
In general, the best braking technique to use in maintaining a safe speed when driving on a downgrade is:
Drivers must have a CDL to legally drive:
A minimum disqualification of 12 months will result for any driver who:
When changing lanes, put your turn signal on, and:
In Oregon, the maximum weight on the steer axle is listed as 600 pounds per inch of tire tread width up to 20,000 pounds. Your steer tires have a load rating of 6,150 pounds each and are 10 inches wide. What is the maximum legal weight your steer axle can carry in Oregon?
Backing your vehicle in a straight line without crossing over or touching the exercise boundaries is called:
Which of these is NOT a danger of a rough acceleration?
An intermodal container is:
To help stay alert while driving, when should you take breaks?
The distance that you should look ahead of your vehicle while driving is about __ at low speed.
Stab braking should not be used on vehicles with:
Putting too much weight towards the rear may cause all of these except:
What is the minimum number of tie-downs to be used on flatbed cargo?
The condition of all in-cab controls should be checked for:
To avoid being blinded by glare when driving at night, drivers should:
When securing a paper roll with a width that is more than twice its diameter, which of the following is not an acceptable method of securement to prevent tipping?
On what day and time does an 11 hour rule violation occur?
Day 1

Day 2

Some suggestions for reducing stress and aggressiveness while driving might include all of the following EXCEPT:
If you're able to arrive early for a delivery, you should:
The maximum number of allowable looks and/or pull-ups on any particular exam exercise is: