ILLINOIS CLASS B NON-CDL
EXAMINATION 2026/2027 QUESTIONS
AND ANSWERS
1. What is the maximum Gross Vehicle Weight Rating (GVWR) of a vehicle you are authorized
to drive with an Illinois Class B Non-CDL, and what are the towing restrictions?
A. Any single vehicle with a GVWR of 16,001 pounds or more, but less than 26,001 pounds.
B. Any single vehicle with a GVWR of 26,001 or more pounds, or any such vehicle towing a
vehicle not in excess of 10,000 pounds.
C. Any combination of vehicles with a GCWR of 26,001 or more pounds, provided the
GVWR of the vehicle(s) being towed is in excess of 10,000 pounds.
D. Any single vehicle with a GVWR of 26,000 pounds or less.
Answer: B
Conceptual Explanation: An Illinois Class B license allows for the operation of a single
vehicle with a GVWR of 26,001 pounds or more, or any such vehicle towing a vehicle not
exceeding 10,000 pounds.
,2. In a dual air brake system, at what pressure should the low-pressure warning buzzer and
light activate?
A. Below 100 psi
B. Below 85 psi
C. Below 20 psi
D. Below 60 psi
Answer: D
Conceptual Explanation: Safety regulations require a warning signal to activate when the
air pressure in either system drops below 60 psi.
3. When testing the air leakage rate on a straight truck with the engine off and brakes
released, the pressure should not drop more than:
A. 1 psi per minute
B. 3 psi per minute
C. 2 psi per minute
D. 4 psi per minute
Answer: C
Conceptual Explanation: For a straight truck or bus, the air loss rate should be no more
than 2 psi in one minute with the engine off and brakes released.
, 4. Which component of the air brake system is responsible for controlling when the air
compressor pumps air into the storage tanks?
A. The safety valve
B. The foot valve
C. The governor
D. The air dryer
Answer: C
Conceptual Explanation: The governor controls when the air compressor will pump air
into the air storage tanks (cut-in and cut-out levels).
5. What is the minimum tread depth required for the front tires of a Class B vehicle?
A. 4/32 inch
B. 1/32 inch
C. 6/32 inch
D. 2/32 inch
Answer: A
Conceptual Explanation: Front tires require at least 4/32 inch tread depth for safety;
other tires require at least 2/32 inch.
EXAMINATION 2026/2027 QUESTIONS
AND ANSWERS
1. What is the maximum Gross Vehicle Weight Rating (GVWR) of a vehicle you are authorized
to drive with an Illinois Class B Non-CDL, and what are the towing restrictions?
A. Any single vehicle with a GVWR of 16,001 pounds or more, but less than 26,001 pounds.
B. Any single vehicle with a GVWR of 26,001 or more pounds, or any such vehicle towing a
vehicle not in excess of 10,000 pounds.
C. Any combination of vehicles with a GCWR of 26,001 or more pounds, provided the
GVWR of the vehicle(s) being towed is in excess of 10,000 pounds.
D. Any single vehicle with a GVWR of 26,000 pounds or less.
Answer: B
Conceptual Explanation: An Illinois Class B license allows for the operation of a single
vehicle with a GVWR of 26,001 pounds or more, or any such vehicle towing a vehicle not
exceeding 10,000 pounds.
,2. In a dual air brake system, at what pressure should the low-pressure warning buzzer and
light activate?
A. Below 100 psi
B. Below 85 psi
C. Below 20 psi
D. Below 60 psi
Answer: D
Conceptual Explanation: Safety regulations require a warning signal to activate when the
air pressure in either system drops below 60 psi.
3. When testing the air leakage rate on a straight truck with the engine off and brakes
released, the pressure should not drop more than:
A. 1 psi per minute
B. 3 psi per minute
C. 2 psi per minute
D. 4 psi per minute
Answer: C
Conceptual Explanation: For a straight truck or bus, the air loss rate should be no more
than 2 psi in one minute with the engine off and brakes released.
, 4. Which component of the air brake system is responsible for controlling when the air
compressor pumps air into the storage tanks?
A. The safety valve
B. The foot valve
C. The governor
D. The air dryer
Answer: C
Conceptual Explanation: The governor controls when the air compressor will pump air
into the air storage tanks (cut-in and cut-out levels).
5. What is the minimum tread depth required for the front tires of a Class B vehicle?
A. 4/32 inch
B. 1/32 inch
C. 6/32 inch
D. 2/32 inch
Answer: A
Conceptual Explanation: Front tires require at least 4/32 inch tread depth for safety;
other tires require at least 2/32 inch.
