CDL Class C Commercial Driver Licensing
Practice Exam Questions With Correct Answers
(Verified Answers) Plus Rationales 2026 Q&A |
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1. Which of the following is required for a Class C commercial
driver’s license?
A. Operating a vehicle designed to transport 16 or more
passengers
B. Operating a vehicle carrying hazardous materials
C. Operating a vehicle designed to transport fewer than 16
passengers or hazardous materials
D. Operating any passenger vehicle for personal use
Answer: C
Rationale: A Class C CDL allows a driver to operate vehicles designed
to transport fewer than 16 passengers or vehicles carrying hazardous
materials. Larger vehicles require Class B or A licenses.
2. What is the primary purpose of a pre-trip inspection?
A. To ensure the vehicle is visually clean
, B. To detect safety defects before operating the vehicle
C. To adjust mirrors and seats
D. To verify the route
Answer: B
Rationale: Pre-trip inspections are conducted to identify safety defects
that could cause accidents or breakdowns, ensuring the vehicle is safe
to operate.
3. When backing a commercial vehicle, you should:
A. Always rely on mirrors alone
B. Use a spotter when possible and check mirrors frequently
C. Back quickly to reduce time on the road
D. Only use the rearview camera
Answer: B
Rationale: Using a spotter and checking mirrors frequently reduces
blind spots and increases safety when backing a commercial vehicle.
4. How often must the air brake system be checked on a vehicle with
air brakes?
A. Once a week
B. Only before driving
C. During pre-trip inspection and as needed while operating
D. Only after long trips
,Answer: C
Rationale: Air brake systems must be inspected during the pre-trip
inspection and monitored during operation to prevent failures.
5. If your vehicle begins to skid, the first action should be to:
A. Slam on the brakes
B. Steer in the opposite direction of the skid
C. Take your foot off the accelerator and steer in the direction of
the skid
D. Shift to neutral
Answer: C
Rationale: Removing pressure from the accelerator and steering into
the skid helps regain traction safely.
6. What is the proper hand signal for a left turn if your turn signals
are not working?
A. Left arm straight out horizontally
B. Left arm bent upward at 90 degrees
C. Left arm bent downward at 90 degrees
D. Right arm straight out horizontally
Answer: A
Rationale: The standard hand signal for a left turn is extending the left
arm straight out horizontally.
, 7. What should you do if your vehicle hydroplanes?
A. Brake firmly
B. Accelerate slightly
C. Ease off the accelerator and steer straight until you regain
traction
D. Turn sharply in the direction of the skid
Answer: C
Rationale: Hydroplaning occurs when tires lose contact with the road
due to water; easing off the accelerator and steering straight helps
restore traction safely.
8. When transporting hazardous materials, placards must be:
A. Only displayed at the front of the vehicle
B. Displayed on all four sides of the vehicle
C. Displayed only when the vehicle is stationary
D. Optional if the load is small
Answer: B
Rationale: Hazardous materials must be clearly identified with
placards on all four sides to alert others and comply with safety
regulations.
9. What is the primary hazard of driving a vehicle with a high center
of gravity?
Practice Exam Questions With Correct Answers
(Verified Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
1. Which of the following is required for a Class C commercial
driver’s license?
A. Operating a vehicle designed to transport 16 or more
passengers
B. Operating a vehicle carrying hazardous materials
C. Operating a vehicle designed to transport fewer than 16
passengers or hazardous materials
D. Operating any passenger vehicle for personal use
Answer: C
Rationale: A Class C CDL allows a driver to operate vehicles designed
to transport fewer than 16 passengers or vehicles carrying hazardous
materials. Larger vehicles require Class B or A licenses.
2. What is the primary purpose of a pre-trip inspection?
A. To ensure the vehicle is visually clean
, B. To detect safety defects before operating the vehicle
C. To adjust mirrors and seats
D. To verify the route
Answer: B
Rationale: Pre-trip inspections are conducted to identify safety defects
that could cause accidents or breakdowns, ensuring the vehicle is safe
to operate.
3. When backing a commercial vehicle, you should:
A. Always rely on mirrors alone
B. Use a spotter when possible and check mirrors frequently
C. Back quickly to reduce time on the road
D. Only use the rearview camera
Answer: B
Rationale: Using a spotter and checking mirrors frequently reduces
blind spots and increases safety when backing a commercial vehicle.
4. How often must the air brake system be checked on a vehicle with
air brakes?
A. Once a week
B. Only before driving
C. During pre-trip inspection and as needed while operating
D. Only after long trips
,Answer: C
Rationale: Air brake systems must be inspected during the pre-trip
inspection and monitored during operation to prevent failures.
5. If your vehicle begins to skid, the first action should be to:
A. Slam on the brakes
B. Steer in the opposite direction of the skid
C. Take your foot off the accelerator and steer in the direction of
the skid
D. Shift to neutral
Answer: C
Rationale: Removing pressure from the accelerator and steering into
the skid helps regain traction safely.
6. What is the proper hand signal for a left turn if your turn signals
are not working?
A. Left arm straight out horizontally
B. Left arm bent upward at 90 degrees
C. Left arm bent downward at 90 degrees
D. Right arm straight out horizontally
Answer: A
Rationale: The standard hand signal for a left turn is extending the left
arm straight out horizontally.
, 7. What should you do if your vehicle hydroplanes?
A. Brake firmly
B. Accelerate slightly
C. Ease off the accelerator and steer straight until you regain
traction
D. Turn sharply in the direction of the skid
Answer: C
Rationale: Hydroplaning occurs when tires lose contact with the road
due to water; easing off the accelerator and steering straight helps
restore traction safely.
8. When transporting hazardous materials, placards must be:
A. Only displayed at the front of the vehicle
B. Displayed on all four sides of the vehicle
C. Displayed only when the vehicle is stationary
D. Optional if the load is small
Answer: B
Rationale: Hazardous materials must be clearly identified with
placards on all four sides to alert others and comply with safety
regulations.
9. What is the primary hazard of driving a vehicle with a high center
of gravity?
