illinois
CDL Practice Test

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

When does your vehicle's single brake system need an adjustment?

if the pressure builds from 50 to 75 psi in less than 3 minutes

when the pressure builds from 85 to 100 psi in less than 1 minute

when the governor stops between 75-90 psi

if the compressor cuts out at between 70 and 90 psi

2 / 40

When using turn signals, which of the following should be avoided?

signal when you are merging into traffic

signal before you exit

signal when you want to change lanes

signal just before you start to make a turn

3 / 40

You are required to have a tank endorsement when transporting:

Materials that are hazardous

Gas or liquid

Passengers

Bulk fertilizer

4 / 40

Which of the following is a clue another driver is impaired:

Open window in warm weather.

Stopping at a green light, or waiting too long at a stop.

Exiting the interstate when there's no gas station visible.

All of these answers are correct.

5 / 40

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

check if your vehicle was manufactured after March 1, 1998 (they are required to have the panel light)

all of these answers are correct

check for yellow abs malfunction lamps on the instrument panel

look for wheel speed sensor wires that are coming from the rear of your brakes

6 / 40

When should you check your mirrors for a lane change?

Right after starting the lane change.

After completing the lane change.

All of these answers are correct.

Before and after signaling the change.

7 / 40

When backing, what is the best method to use to avoid blind spots?

back towards the driver's side, where you can see better

use mirrors on both sides

look at your path

use a helper

8 / 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?

the emergency air line will release air

none of the answers listed

the service brakes will move to a fully applied position

you should hear air escape from the open valve

9 / 40

Which of the following is NOT a part of the steering system?

tie rod

main spring

steering knuckle

hydraulic fluid reservoir

10 / 40

How should the hand valve be used?

to test the trailer brakes

only when accompanied by the foot brake

only when accompanied by the service brakes

only when the trailer is loaded to its maximum weight

11 / 40

The best way to have control on curves is:

to shift to a lower gear before entering the curve

you do not need to do anything different

keep pressure on the brake pedal through the turn

to decrease to your safe speed before entering the curve and then accelerate through it

12 / 40

You must control how far packages labeled "Radioactive II" or "Radioactive III" are located from people and cargo space walls by referring to:

The table of hazardous materials.

The segregation and separation chart.

The list of hazardous materials and reportable quantities.

The transport index and the separation distances table.

13 / 40

Which of the following statements about overhead space is true?

warning lights are always installed on low bridges and overpasses

the weight of the cargo changes a truck's height

an empty van is lower than a loaded one

athe heights posted at bridges are usually accurate

14 / 40

What should you hook up before backing a tractor to a trailer for coupling?

there is nothing to be hooked up

the safety bar

the service and emergency air lines

the electrical service line

15 / 40

You should_____when the low pressure warning is activated:

maintain highway speed and keep an eye on your air pressure gauge

come to a safe stop while you still have control of the brakes

pump the brake pedal to come to a stop immediately

wait until the air brakes kick in automatically

16 / 40

Where can you find a shipper’s certification?

It is a separate document that all hazmat drivers must keep in their vehicles.

There is no such thing.

On all packages.

On the original shipping paper.

17 / 40

What is NOT one of the four skill areas that operating a commercial vehicle requires?

steering

first aid certification

safely backing

accelerating

18 / 40

When inspecting your bus, you must make sure that:

Every handhold and railing is secure.

Rider signaling devices are working.

Emergency exit handles are secure.

All of these answers are correct.

19 / 40

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

There is no restrictions with this material if shipped by water only.

This material has no restrictions when shipped by air and/or water.

It is ok to ship this material by air only.

This material is only restricted when shipped by air and/or water.

20 / 40

Which of the following answers lists the three types of emergency equipment you must have on your bus?

Repair kit, spare electric fuses (unless equipped with circuit breakers), and fire extinguisher.

Hydraulic jack, fire extinguisher, signal flares.

Emergency reflectors, fire extinguisher, signal flares and tire repair kit.

Fire extinguisher, spare electrical fuses (unless equipped with circuit breakers), and emergency reflectors.

21 / 40

What are the three hazard classes should NOT be loaded into a trailer that has a heater air conditioner unit?

None of these answers are correct.

Class 2 explosives, class 3 flammable solids, and division 21 inhalation hazard.

Class 1 explosives, class 8 corrosives, and division 5 oxidizers.

Class 1 explosives, class 3 flammable liquids, and division 21 flammable gas.

22 / 40

Which of the following should you do when confronted by an aggressive driver?

all of these answers are correct

ignore rude gestures and refuse to react negatively

avoid eye contact

if you can safely do it, call the police from a cell phone

23 / 40

The best way to go into a curve is to decrease your speed going into the curve and then ____going through it.

slightly accelerate

shift down 2 gears

ride the brake

none of the answers listed

24 / 40

Select the true statement in regards to an application pressure gauge:

it shows how much air pressure you are applying to the brakes

it prevents the brakes from failing

it is connected to the generator

when accelerating it releases air

25 / 40

The main reason you should pull the dolly out from under a trailer before disconnecting it from the trailer in front is:

so the rear-trailer's air brake system will stay charged and keep the trailer wheels locked to prevent rolling

removing the dolly before uncoupling is not the correct procedure

to provide additional lateral stabilization to the front trailer

it is possible that the dolly tow bar could fly up making it difficult to re-couple

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.

it should not be done

it is the best possible way to brake and maintain the truck in a straight path

should be used with caution and only if you are aware of the dangers

it will result in less skidding than when just using the brake pedal alone

27 / 40

Select the definition for outage:

It is loss of power to the headlights.

It is the process of liquid expansion as it becomes warm.

It is the liquid that must be drained off to meet legal carry limit.

It is how much power is lost to the hydraulics.

28 / 40

Secure baggage and freight in ways that avoid damage and:

Allow riders to exit by any window or door in an emergency.

Allow the driver to move freely and easily.

All of these answers are correct.

Protect riders from injury if carry-ons fall or shift.

29 / 40

On a bus, you may sometimes haul small-arms ammunition, emergency shipments of drugs, or hospital supplies. The total weight of all such hazardous materials must not be greater than:

300 pounds

500 pounds

250 pounds

100 pounds

30 / 40

You should_____when checking the slack adjusters on S-Cam brakes.

pull on the slack adjusters after draining the air from the system

pull on the slack adjuster while the parking brakes are on

pull hard on each slack adjuster while wearing gloves

make sure there is an inch of leeway in each direction for the slack adjuster

31 / 40

The _____of the kingpin has the locking jaw close around it.

shank

tip

apex

dull section

32 / 40

In Column 1 the symbol "I" means:

Iodine.

International transportation.

Invalid substance.

International restrictions.

33 / 40

What is the most important reason for doing a school bus inspection?

To assist the school principal with their report.

To check for flat tires.

For safety required by federal, state, and local laws.

To give the mechanic something to do.

34 / 40

Select which is not an engine compartement belt:

A power steering belt

An air compressor belt

A safety belt

A water pump belt

35 / 40

With most hazardous materials, you may park within 5 feet of the road briefly, if your work requires it. The materials that are the exception and do not allow parking this close to the road are:

Explosives A and B

Liquids

Acids and poisons

Corrosives and oxidizers

36 / 40

You do not have a hazardous materials endorsement on your commercial driver license. When can you legally haul hazardous materials?

Only when the shipment does not cross state lines.

Only in the event of a federally declared emergency situation.

Never.

Only when the vehicle does not require placards.

37 / 40

Which of the following statements is true about speed management?

All of these answers are correct.

The posted speed limit is safe for all conditions.

You should be able to stop within the distance that you can see ahead.

Speed limits for buses are the same as cars.

38 / 40

This carries hydraulic fluid or air to the wheel brake assemby.

Brake lines/hoses

Connector rods

Slack pieces

Brake drums

39 / 40

Why is understanding the loading and unloading procedures so critical?

Because many students are killed while getting on and off a school bus each year.

Because motorists ignore students walking to school.

Because only high school students understand how to cross the road.

Because school district officials have the authority to conduct surprise quizzes and you must know the correct answers to keep your job.

40 / 40

Which of the following statements about "Radioactive" labels is true?

Yellow ii indicates the highest level of radioactivity.

White i indicates the highest level of radioactivity.

Black iii indicates the highest level of radioactivity.

Yellow iii indicates the highest level of radioactivity.

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.

illinois CDL Practice Test

CDL Category Practice Tests

CDL Practice Test

How To Get An illinois Commercial Drivers License

Hit the Open Road

illinois CDL License Test Tips

Additional Information

Information on the Office of the Illinois Secretary of State

Additional Illinois CDL Helpful Links

illinois
CDL Practice Test