CDL Class B Exam With Actual Questions
& Verified Answers, Plus Explained
Rationales/Expert Verified For
Guaranteed 100% Pass 2026/Latest
Update/Instant Download Pdf
1. What is the maximum gross vehicle weight rating (GVWR) for a
Class B CDL vehicle?
A) 10,000 lbs
B) 26,000 lbs
C) 33,000 lbs
D) 50,000 lbs
B) 26,000 lbs
Rationale: Class B vehicles have a GVWR of 26,001 lbs or more, but
the vehicle cannot exceed Class A limits unless towing a lighter trailer.
2. When performing a pre-trip inspection, which of the following
should be checked first?
A) Brake system
B) Engine compartment
C) Steering system
D) Tires
B) Engine compartment
Rationale: The engine compartment should be checked first to ensure
there are no fluid leaks, loose wires, or other issues that could prevent
the vehicle from starting or cause unsafe operation.
, 3. How often must a CDL driver stop to check cargo?
A) Every 2 hours or 100 miles
B) Every 3 hours or 150 miles
C) Every 4 hours or 200 miles
D) Every 5 hours or 250 miles
A) Every 2 hours or 100 miles
Rationale: Federal regulations require drivers to inspect cargo at least
every 2 hours or 100 miles to ensure it is secure.
4. What is the proper way to brake when driving on a slippery
surface?
A) Slam the brakes hard
B) Pump the brakes gently
C) Use cruise control
D) Shift to neutral and brake
B) Pump the brakes gently
Rationale: Pumping the brakes helps prevent wheel lockup and loss of
control on slippery surfaces.
5. Which of the following is a sign of a tire blowout?
A) Vehicle pulling to one side
B) Steering becomes easier
C) Engine temperature drops
D) Horn stops working
A) Vehicle pulling to one side
Rationale: A sudden pull to one side usually indicates a tire has lost air
or failed, requiring immediate control and safe stopping.
6. When must you use your turn signals?
A) Only on highways
B) Only in urban areas
, C) Every time you turn or change lanes
D) Only when other vehicles are nearby
C) Every time you turn or change lanes
Rationale: Turn signals must be used every time to communicate your
intentions and prevent accidents.
7. What is the minimum tread depth for front tires on a CDL vehicle?
A) 2/32 inch
B) 3/32 inch
C) 4/32 inch
D) 6/32 inch
C) 4/32 inch
Rationale: Federal regulations require a minimum tread depth of 4/32
inch on steering (front) tires.
8. When is it safe to back a commercial vehicle?
A) Only when you can see clearly behind you
B) Only in emergency situations
C) Only with a helper guiding you
D) Both A and C
D) Both A and C
Rationale: Backing is dangerous; it should only be done when the
driver has a clear view or assistance from a guide.
9. What is the proper hand placement on a steering wheel?
A) 9 and 3 o’clock
B) 10 and 2 o’clock
C) 12 o’clock only
D) 8 and 4 o’clock
, A) 9 and 3 o’clock
Rationale: Modern recommendations place hands at 9 and 3 for
better control and airbag safety.
10. Which factor has the greatest effect on stopping distance?
A) Tire color
B) Vehicle weight
C) Wind direction
D) Driver height
B) Vehicle weight
Rationale: Heavier vehicles require more distance to stop due to
greater momentum.
11. How should you respond if your brakes fail while driving
downhill?
A) Pump the brakes repeatedly
B) Shift to a lower gear and use the engine brake
C) Steer off the road immediately
D) Turn off the engine
B) Shift to a lower gear and use the engine brake
Rationale: Using engine braking and a lower gear helps slow the
vehicle safely without relying solely on failed brakes.
12. What is the maximum allowable alcohol concentration (BAC)
for a CDL driver?
A) 0.08%
B) 0.04%
C) 0.02%
D) 0.10%
& Verified Answers, Plus Explained
Rationales/Expert Verified For
Guaranteed 100% Pass 2026/Latest
Update/Instant Download Pdf
1. What is the maximum gross vehicle weight rating (GVWR) for a
Class B CDL vehicle?
A) 10,000 lbs
B) 26,000 lbs
C) 33,000 lbs
D) 50,000 lbs
B) 26,000 lbs
Rationale: Class B vehicles have a GVWR of 26,001 lbs or more, but
the vehicle cannot exceed Class A limits unless towing a lighter trailer.
2. When performing a pre-trip inspection, which of the following
should be checked first?
A) Brake system
B) Engine compartment
C) Steering system
D) Tires
B) Engine compartment
Rationale: The engine compartment should be checked first to ensure
there are no fluid leaks, loose wires, or other issues that could prevent
the vehicle from starting or cause unsafe operation.
, 3. How often must a CDL driver stop to check cargo?
A) Every 2 hours or 100 miles
B) Every 3 hours or 150 miles
C) Every 4 hours or 200 miles
D) Every 5 hours or 250 miles
A) Every 2 hours or 100 miles
Rationale: Federal regulations require drivers to inspect cargo at least
every 2 hours or 100 miles to ensure it is secure.
4. What is the proper way to brake when driving on a slippery
surface?
A) Slam the brakes hard
B) Pump the brakes gently
C) Use cruise control
D) Shift to neutral and brake
B) Pump the brakes gently
Rationale: Pumping the brakes helps prevent wheel lockup and loss of
control on slippery surfaces.
5. Which of the following is a sign of a tire blowout?
A) Vehicle pulling to one side
B) Steering becomes easier
C) Engine temperature drops
D) Horn stops working
A) Vehicle pulling to one side
Rationale: A sudden pull to one side usually indicates a tire has lost air
or failed, requiring immediate control and safe stopping.
6. When must you use your turn signals?
A) Only on highways
B) Only in urban areas
, C) Every time you turn or change lanes
D) Only when other vehicles are nearby
C) Every time you turn or change lanes
Rationale: Turn signals must be used every time to communicate your
intentions and prevent accidents.
7. What is the minimum tread depth for front tires on a CDL vehicle?
A) 2/32 inch
B) 3/32 inch
C) 4/32 inch
D) 6/32 inch
C) 4/32 inch
Rationale: Federal regulations require a minimum tread depth of 4/32
inch on steering (front) tires.
8. When is it safe to back a commercial vehicle?
A) Only when you can see clearly behind you
B) Only in emergency situations
C) Only with a helper guiding you
D) Both A and C
D) Both A and C
Rationale: Backing is dangerous; it should only be done when the
driver has a clear view or assistance from a guide.
9. What is the proper hand placement on a steering wheel?
A) 9 and 3 o’clock
B) 10 and 2 o’clock
C) 12 o’clock only
D) 8 and 4 o’clock
, A) 9 and 3 o’clock
Rationale: Modern recommendations place hands at 9 and 3 for
better control and airbag safety.
10. Which factor has the greatest effect on stopping distance?
A) Tire color
B) Vehicle weight
C) Wind direction
D) Driver height
B) Vehicle weight
Rationale: Heavier vehicles require more distance to stop due to
greater momentum.
11. How should you respond if your brakes fail while driving
downhill?
A) Pump the brakes repeatedly
B) Shift to a lower gear and use the engine brake
C) Steer off the road immediately
D) Turn off the engine
B) Shift to a lower gear and use the engine brake
Rationale: Using engine braking and a lower gear helps slow the
vehicle safely without relying solely on failed brakes.
12. What is the maximum allowable alcohol concentration (BAC)
for a CDL driver?
A) 0.08%
B) 0.04%
C) 0.02%
D) 0.10%
