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Illinois CDL License Practice Test

To get a local truck driving job in Illinois you need your class A CDL license. This short practice test will help you check your general knowledge of concepts related to the safe operation of a semi-truck in Illinois.


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#1 True or False: Federal and state laws require that drivers inspect their vehicles.


#3 Rust around wheel nuts may mean the nuts ___________.


#5 Because you cannot see everything behind your vehicle, backing is __________ dangerous.

#6 They reduce brake wear and give you another way to slow down.

#7 True or False: Many large vehicles have __________ mirrors that show a wider area than flat mirrors.


#9 True or False: It’s OK to help out others by signaling when it is safe to pass.

#10 If you find yourself being tailgated, you can do this to reduce the chances of an accident:


#12 Large vehicles can hit other vehicles or objects during turns because of wide turning and __________.



#15 __________ is a thin layer of ice that is clear enough that you can see the road underneath it.


#17 __________ is the number one cause of injury and death in roadway work zones.

#18 True or False: You should use low beams whenever you can.


#20 The 2 types of railway crossings are

#21 The round warning sign placed ahead of a public railroad-highway crossing is colored __________.




#25 Why do most hydraulic brake failures occur?

#26 By far the most common skid is one in which the __________ lose traction through excessive braking or acceleration.

#27 __________ and duals that touch are 2 causes of tire fires.

#28 __________ causes most front-wheel skids.


#30 True or False: Stopping is not always the safest thing to do in an emergency.

#31 BAC is determined by the amount of alcohol you drink, how fast you drink it and your __________.


#33 __________ are signs put on the outside of a vehicle that identify the hazard class of the cargo.


#35 The total weight of a single vehicle including its load.

#36 The value specified by the manufacturer as the loaded weight of a combination (articulated) vehicle.

#37 True or False: A low center of gravity means you are more likely to tip over.


#39 On flatbed trailers cargo should have at least one tie-down for each __________ of cargo.



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