Illinois CDL Drivers Test Questions with 100%
Verified Correct Answers 2024/2025
What is the most important reason for doing a vehicle inspection? - Correct Answer SAFETY
What things should you check during a trip? - Correct Answer TIRES, BRAKES, LIGHTS AND
REFLECTORS, BRAKE AND ELECTRICAL CONNECTIONS TO TRAILER, TRAILER COUPLING DEVICES,
CARGO SECUREMENT DEVICES.
Name some key steering system parts. - Correct Answer STEERING WHEEL, STEERING ARMS,
STEERING WHEEL SHAFT, TIE ROD, STEERING GEAR BOX, PITMAN ARM, DRAG LINK, STEERING RING
KNUCKLE, SPINDLE.
Name some suspension system defects. - Correct Answer SPRING HANGERS THAT MOVE, CRACKED
OR BROKEN SPRING HANGERS, MISSING OR BROKEN LEAVES, LEAKING SHOCK ABSORBERS, TORQUE
ROD ARM
What three kinds of emergency equipment must you have? - Correct Answer FIRE EXTINGUISHER,
SPARE FUSES, WARNING DEVICES (TRIANGLES)
What is the minimum tread depth for front tires?For other tires? - Correct Answer FRONT 4/32 REAR
2/32
Name some things you should check on the front of your vehicle during the walk-around inspection. -
Correct Answer CONDITION OF FRONT AXLE, STEERING SYSTEM, WINDSHIELD, LIGHTS AND
REFLECTORS
What should wheel bearing seals be checked for? - Correct Answer NOT LEAKING
How many red reflective triangles should you carry? - Correct Answer 3
How do you test hydraulic brakes for leaks? - Correct Answer PUMP BREAK PEDAL 3 TIMES, THEN
APPLY FIRM PRESSURE TO PEDAL AND HOLD FOR 5 SECONDS. THE PEDAL SHOULD NOT MOVE.
Why put the starter switch key in your pocket during the pre-trip inspection? - Correct Answer SO NO
ONE CAN STEAL YOUR VEHICLE.
, Why should you back toward the driver's side? - Correct Answer SO YOU CAN SEE BETTER.
If stopped on a hill, how can you start moving without rolling back? - Correct Answer PARTLY ENGAGE
THE CLUTCH BEFORE YOU TAKE YOUR RIGHT FOOT OFF THE BRAKE.
When backing, why is it important to use a helper? - Correct Answer SO THEY CAN HELP YOU SEE
AND SO THEY CAN CHECK YOUR BLIND SPOTS.
What's the most important hand signal that you and the helper should agree on? - Correct Answer
STOP
What are the two special conditions where you should downshift? - Correct Answer BEFORE
STARTING DOWN A HILL AND BEFORE ENTERING A CURVE.
When should you downshift automatic transmissions? - Correct Answer YOU CAN SELECT A LOW
RANGE TO GET GREATER BRAKING WHEN GOING DOWN GRADES.
Retarders keep you from skidding when the road is slippery. True or False? - Correct Answer FALSE
What are the two ways to know when to shift? - Correct Answer RPM AND MPH
How far ahead does the manual say you should look? - Correct Answer 12-15 SECONDS
What are two main things to look for ahead? - Correct Answer VEHICLES COMING ONTO THE
HIGHWAY, INTO YOUR LANE OR TURNING AND BRAKE LIGHTS.
What's your most important way to see the sides and rear of your vehicle? - Correct Answer CHECK
YOUR MIRRORS.
What does "communicating" mean in safe driving? - Correct Answer SIGNAL YOUR INTENTIONS.
Where should your reflectors be placed when stopped on a divided highway? - Correct Answer 10
FEET, 100 FEET, 200 FEET TOWARD THE APPROACHING TRAFFIC.
Verified Correct Answers 2024/2025
What is the most important reason for doing a vehicle inspection? - Correct Answer SAFETY
What things should you check during a trip? - Correct Answer TIRES, BRAKES, LIGHTS AND
REFLECTORS, BRAKE AND ELECTRICAL CONNECTIONS TO TRAILER, TRAILER COUPLING DEVICES,
CARGO SECUREMENT DEVICES.
Name some key steering system parts. - Correct Answer STEERING WHEEL, STEERING ARMS,
STEERING WHEEL SHAFT, TIE ROD, STEERING GEAR BOX, PITMAN ARM, DRAG LINK, STEERING RING
KNUCKLE, SPINDLE.
Name some suspension system defects. - Correct Answer SPRING HANGERS THAT MOVE, CRACKED
OR BROKEN SPRING HANGERS, MISSING OR BROKEN LEAVES, LEAKING SHOCK ABSORBERS, TORQUE
ROD ARM
What three kinds of emergency equipment must you have? - Correct Answer FIRE EXTINGUISHER,
SPARE FUSES, WARNING DEVICES (TRIANGLES)
What is the minimum tread depth for front tires?For other tires? - Correct Answer FRONT 4/32 REAR
2/32
Name some things you should check on the front of your vehicle during the walk-around inspection. -
Correct Answer CONDITION OF FRONT AXLE, STEERING SYSTEM, WINDSHIELD, LIGHTS AND
REFLECTORS
What should wheel bearing seals be checked for? - Correct Answer NOT LEAKING
How many red reflective triangles should you carry? - Correct Answer 3
How do you test hydraulic brakes for leaks? - Correct Answer PUMP BREAK PEDAL 3 TIMES, THEN
APPLY FIRM PRESSURE TO PEDAL AND HOLD FOR 5 SECONDS. THE PEDAL SHOULD NOT MOVE.
Why put the starter switch key in your pocket during the pre-trip inspection? - Correct Answer SO NO
ONE CAN STEAL YOUR VEHICLE.
, Why should you back toward the driver's side? - Correct Answer SO YOU CAN SEE BETTER.
If stopped on a hill, how can you start moving without rolling back? - Correct Answer PARTLY ENGAGE
THE CLUTCH BEFORE YOU TAKE YOUR RIGHT FOOT OFF THE BRAKE.
When backing, why is it important to use a helper? - Correct Answer SO THEY CAN HELP YOU SEE
AND SO THEY CAN CHECK YOUR BLIND SPOTS.
What's the most important hand signal that you and the helper should agree on? - Correct Answer
STOP
What are the two special conditions where you should downshift? - Correct Answer BEFORE
STARTING DOWN A HILL AND BEFORE ENTERING A CURVE.
When should you downshift automatic transmissions? - Correct Answer YOU CAN SELECT A LOW
RANGE TO GET GREATER BRAKING WHEN GOING DOWN GRADES.
Retarders keep you from skidding when the road is slippery. True or False? - Correct Answer FALSE
What are the two ways to know when to shift? - Correct Answer RPM AND MPH
How far ahead does the manual say you should look? - Correct Answer 12-15 SECONDS
What are two main things to look for ahead? - Correct Answer VEHICLES COMING ONTO THE
HIGHWAY, INTO YOUR LANE OR TURNING AND BRAKE LIGHTS.
What's your most important way to see the sides and rear of your vehicle? - Correct Answer CHECK
YOUR MIRRORS.
What does "communicating" mean in safe driving? - Correct Answer SIGNAL YOUR INTENTIONS.
Where should your reflectors be placed when stopped on a divided highway? - Correct Answer 10
FEET, 100 FEET, 200 FEET TOWARD THE APPROACHING TRAFFIC.
