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COMMERCIAL DRIVER LICENSE
EXAM 2024-2025 ACTUAL EXAM
COMPLETE 450 QUESTIONS WITH
DETAILED VERIFIED ANSWERS (100%
CORRECT ANSWERS) / ALREADY
GRADED A+
You are driving a new truck with a manual
transmission. What gear will you probably have to
use to take a long, steep, downhill grade? -
....ANSWER...A lower gear than you would use to
climb the hill
For a first offense of driving a commercial vehicle
under the influence of alcohol or drugs, you will lose
your CDL for at least? - ....ANSWER...1 year
You are performing a pre-trip inspection on your
brakes and suspension system. Which of these
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statements is true? - ....ANSWER...Brake shoes
should not have oil, grease, or brake fluid on them.
Which of these statements is true about staying alert
to drive? - ....ANSWER...Sleep is the only thing that
can overcome fatigue
CDL medical certificates must be renewed every -
....ANSWER...2 years
Which of these statements is true about mirror
adjustment? - ....ANSWER...You should adjust you
mirrors before you start a trip.
You can see this sign on a vehicle ahead of you. What
does the sign mean?(3 sides triangle) -
....ANSWER...Slow moving vehicle
You are driving a heavy vehicle. You must exit a
highway using an offramp that curves downhill. You
should - ....ANSWER...Slow down to a safe speed
before the curve.
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You are required to stop at a railroad grade crossing
when? - ....ANSWER...The cargo makes a stop
mandatory under state or federal regulations
The purpose of retarder is to? - ....ANSWER...Help
slow the vehicle while driving and reduce brake
ware
You are checking your steering and exhaust systems
in a pre-trip inspection. Which of these problems
should be fixed before the vehicle is driven? -
....ANSWER...Steering wheel play more than 10
degrees (2 inches on a 20-inch wheel)
If someone is following you too closely( tailgating)
you should - ....ANSWER...Increase your following
distance
When a coolant container is part of a pressurized
system, which of these is true? - ....ANSWER...You
can check the coolant level of a hot engine
What is countersteering - ....ANSWER...Turning the
steering wheel back in the other direction after
steering to avoid a traffic emergency
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Why will your vehicle's speed naturally increase on
downgrades - ....ANSWER...Gravity
You should avoid driving through deep or flowing
water. But if you can't which of these steps can help
keep you brakes working - ....ANSWER...Gently
putting on the brakes while driving through water
Which piece of emergency equipment should be in
your vehicle - ....ANSWER...warning devices for
parked vehicles
convex (curved) mirror - ....ANSWER...show a wider
area than flat mirrors show
Implied consent means - ....ANSWER...You have given
consent to be tested for alcohol in your blood
Which of these is not part of the engine
compartment pre-trip inspection? -
....ANSWER...valve clearance
COMMERCIAL DRIVER LICENSE
EXAM 2024-2025 ACTUAL EXAM
COMPLETE 450 QUESTIONS WITH
DETAILED VERIFIED ANSWERS (100%
CORRECT ANSWERS) / ALREADY
GRADED A+
You are driving a new truck with a manual
transmission. What gear will you probably have to
use to take a long, steep, downhill grade? -
....ANSWER...A lower gear than you would use to
climb the hill
For a first offense of driving a commercial vehicle
under the influence of alcohol or drugs, you will lose
your CDL for at least? - ....ANSWER...1 year
You are performing a pre-trip inspection on your
brakes and suspension system. Which of these
,2|Page
statements is true? - ....ANSWER...Brake shoes
should not have oil, grease, or brake fluid on them.
Which of these statements is true about staying alert
to drive? - ....ANSWER...Sleep is the only thing that
can overcome fatigue
CDL medical certificates must be renewed every -
....ANSWER...2 years
Which of these statements is true about mirror
adjustment? - ....ANSWER...You should adjust you
mirrors before you start a trip.
You can see this sign on a vehicle ahead of you. What
does the sign mean?(3 sides triangle) -
....ANSWER...Slow moving vehicle
You are driving a heavy vehicle. You must exit a
highway using an offramp that curves downhill. You
should - ....ANSWER...Slow down to a safe speed
before the curve.
,3|Page
You are required to stop at a railroad grade crossing
when? - ....ANSWER...The cargo makes a stop
mandatory under state or federal regulations
The purpose of retarder is to? - ....ANSWER...Help
slow the vehicle while driving and reduce brake
ware
You are checking your steering and exhaust systems
in a pre-trip inspection. Which of these problems
should be fixed before the vehicle is driven? -
....ANSWER...Steering wheel play more than 10
degrees (2 inches on a 20-inch wheel)
If someone is following you too closely( tailgating)
you should - ....ANSWER...Increase your following
distance
When a coolant container is part of a pressurized
system, which of these is true? - ....ANSWER...You
can check the coolant level of a hot engine
What is countersteering - ....ANSWER...Turning the
steering wheel back in the other direction after
steering to avoid a traffic emergency
, 4|Page
Why will your vehicle's speed naturally increase on
downgrades - ....ANSWER...Gravity
You should avoid driving through deep or flowing
water. But if you can't which of these steps can help
keep you brakes working - ....ANSWER...Gently
putting on the brakes while driving through water
Which piece of emergency equipment should be in
your vehicle - ....ANSWER...warning devices for
parked vehicles
convex (curved) mirror - ....ANSWER...show a wider
area than flat mirrors show
Implied consent means - ....ANSWER...You have given
consent to be tested for alcohol in your blood
Which of these is not part of the engine
compartment pre-trip inspection? -
....ANSWER...valve clearance
