Maryland CDL Class B Knowledge Test
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationale 2026 Q&A| Instant Download
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1. A Class B CDL is required primarily to operate which type of vehicle?
A. Any passenger vehicle under 10,000 lbs GVWR
B. A single vehicle over 26,001 lbs GVWR or a vehicle designed to
transport 24 or more passengers
C. Any tractor-trailer combination regardless of weight
D. Only motorcycles and three-wheeled vehicles
Answer: B
A Class B CDL applies to large single vehicles exceeding 26,001
pounds GVWR or buses and similar vehicles designed to carry 24 or
more passengers, excluding tractor-trailer combinations which
generally require a Class A CDL.
2. What is the minimum number of questions on the Maryland Class B
CDL knowledge test?
A. 25 questions
B. 30 questions
C. 40 questions
, D. 50 questions
Answer: D
The Maryland Class B CDL knowledge exam typically contains 50
multiple-choice questions drawn from the CDL manual, covering
general knowledge and safety topics.
3. What is the required passing score for the Maryland Class B CDL
knowledge test?
A. 70%
B. 75%
C. 80%
D. 88%
Answer: C
Candidates must correctly answer at least 80% of the questions,
meaning a minimum of 40 correct answers out of 50 is required to
pass.
4. Which document is the primary source for Maryland CDL Class B
knowledge test questions?
A. Maryland Vehicle Inspection Manual
B. Maryland Driver’s Handbook only
C. Maryland Commercial Driver License Manual
D. Federal Highway Safety Handbook only
Answer: C
All CDL knowledge test questions are based on the Maryland
Commercial Driver License Manual, which outlines required
commercial driving knowledge.
5. What is the safest action when a vehicle begins to hydroplane?
A. Brake hard immediately
B. Accelerate to regain traction
C. Release the accelerator and steer gently in the direction of travel
, D. Turn off the ignition
Answer: C
Releasing the accelerator allows the vehicle to slow gradually and
helps the tires regain contact with the road surface while
maintaining directional control.
6. Why do empty large trucks sometimes take longer to stop than loaded
trucks?
A. Because brakes become less effective when empty
B. Because there is reduced traction on the tires
C. Because engine power increases braking distance
D. Because air pressure decreases automatically
Answer: B
An empty truck has less weight on the tires, which reduces traction
and can increase stopping distance compared to a properly loaded
vehicle.
7. What is the main purpose of Anti-lock Braking Systems (ABS) in
commercial vehicles?
A. Increase engine power during braking
B. Prevent wheel lockup during hard braking
C. Eliminate the need for brake maintenance
D. Automatically stop the vehicle without driver input
Answer: B
ABS prevents wheels from locking during braking, allowing the driver
to maintain steering control during emergency stops.
8. When driving a vehicle with ABS, how should the brake pedal be
applied?
A. Pump the brakes rapidly
B. Apply steady pressure without pumping
C. Apply only half pressure
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationale 2026 Q&A| Instant Download
1. A Class B CDL is required primarily to operate which type of vehicle?
A. Any passenger vehicle under 10,000 lbs GVWR
B. A single vehicle over 26,001 lbs GVWR or a vehicle designed to
transport 24 or more passengers
C. Any tractor-trailer combination regardless of weight
D. Only motorcycles and three-wheeled vehicles
Answer: B
A Class B CDL applies to large single vehicles exceeding 26,001
pounds GVWR or buses and similar vehicles designed to carry 24 or
more passengers, excluding tractor-trailer combinations which
generally require a Class A CDL.
2. What is the minimum number of questions on the Maryland Class B
CDL knowledge test?
A. 25 questions
B. 30 questions
C. 40 questions
, D. 50 questions
Answer: D
The Maryland Class B CDL knowledge exam typically contains 50
multiple-choice questions drawn from the CDL manual, covering
general knowledge and safety topics.
3. What is the required passing score for the Maryland Class B CDL
knowledge test?
A. 70%
B. 75%
C. 80%
D. 88%
Answer: C
Candidates must correctly answer at least 80% of the questions,
meaning a minimum of 40 correct answers out of 50 is required to
pass.
4. Which document is the primary source for Maryland CDL Class B
knowledge test questions?
A. Maryland Vehicle Inspection Manual
B. Maryland Driver’s Handbook only
C. Maryland Commercial Driver License Manual
D. Federal Highway Safety Handbook only
Answer: C
All CDL knowledge test questions are based on the Maryland
Commercial Driver License Manual, which outlines required
commercial driving knowledge.
5. What is the safest action when a vehicle begins to hydroplane?
A. Brake hard immediately
B. Accelerate to regain traction
C. Release the accelerator and steer gently in the direction of travel
, D. Turn off the ignition
Answer: C
Releasing the accelerator allows the vehicle to slow gradually and
helps the tires regain contact with the road surface while
maintaining directional control.
6. Why do empty large trucks sometimes take longer to stop than loaded
trucks?
A. Because brakes become less effective when empty
B. Because there is reduced traction on the tires
C. Because engine power increases braking distance
D. Because air pressure decreases automatically
Answer: B
An empty truck has less weight on the tires, which reduces traction
and can increase stopping distance compared to a properly loaded
vehicle.
7. What is the main purpose of Anti-lock Braking Systems (ABS) in
commercial vehicles?
A. Increase engine power during braking
B. Prevent wheel lockup during hard braking
C. Eliminate the need for brake maintenance
D. Automatically stop the vehicle without driver input
Answer: B
ABS prevents wheels from locking during braking, allowing the driver
to maintain steering control during emergency stops.
8. When driving a vehicle with ABS, how should the brake pedal be
applied?
A. Pump the brakes rapidly
B. Apply steady pressure without pumping
C. Apply only half pressure
