Illinois SOS CDL practice test: General Knowledge

Question 1

What is the only way to stop a front-wheel skid?

Accepted Answer

Let the vehicle slow down

Answer

Turn the wheel harder in the direction you want

Answer

Brake harder

Answer

Shift into a higher gear

Question 2

Your drive wheels lock and the rig starts to skid. What is the first correction?

Accepted Answer

Take your foot off the brake, then steer the way you want the front of the vehicle to go

Answer

Press the brake pedal harder to lock them

Answer

Accelerate quickly

Answer

Keep braking and steer away from the direction the vehicle is heading

Question 3

If your engine is on fire, what is the best way to attack it?

Accepted Answer

Turn off the engine and use foam through the grille or from underneath

Answer

Raise the hood so you can see the fire

Answer

Drive on until you reach the next service station

Answer

Spray water into the hot engine compartment

Question 4

Why should you be extra careful around a stopped bus?

Accepted Answer

Passengers may walk in front of or behind it without seeing you

Answer

The bus may need to pass you

Answer

The bus driver has the right of way

Answer

The bus makes the road slippery

Question 5

Which type of distraction is most dangerous because it takes both your hands and your mind?

Accepted Answer

Texting

Answer

Listening to the radio

Answer

Talking to a passenger

Answer

Looking at a billboard

Question 6

Before you begin driving, which step helps to avoid distraction?

Accepted Answer

Set the GPS, adjust mirrors, and plan the route

Answer

Set the radio to a station you have not heard before

Answer

Eat a meal as you drive off

Answer

Return a call while pulling out

Question 7

What can too little weight on the drive axles cause?

Accepted Answer

Poor traction and wheel spin

Answer

Heavy steering

Answer

A broken fifth wheel

Answer

Brake fade

Question 8

An applicant takes the CDL skills test in a truck that has no air brakes. What is the result on the license?

Accepted Answer

An air brake restriction that bars air-brake vehicles

Answer

A required retest of the whole skills test within thirty days

Answer

A speed limit of forty-five miles per hour

Answer

A note that the driver may carry only light cargo

Question 9

What does it mean to be in a conflict with another road user?

Accepted Answer

You must change speed or direction to avoid hitting them

Answer

You disagree about who has the right of way

Answer

You are following too closely

Answer

You are being passed on the right

Question 10

Which of these is something a commercial learner permit holder may NOT do?

Accepted Answer

Haul a load that requires hazardous materials placards

Answer

Practice on public roads with a qualified CDL holder seated beside you

Answer

Drive an empty tank vehicle with a tank endorsement

Answer

Take the knowledge test for a passenger endorsement

Illinois SOS CDL practice test

What is the only way to stop a front-wheel skid?

All Illinois CDL knowledge tests

Illinois SOS CDL practice test

What is the only way to stop a front-wheel skid?

All Illinois CDL knowledge tests