ILLINOIS CLASS B NON-CDL
PROFESSIONAL EXAMINATION 2027
QUESTIONS AND ANSWERS
1. A Class B Non-CDL license is required in Illinois for any single vehicle with a Gross Vehicle
Weight Rating (GVWR) of:
A. 16,001 lbs or more, but less than 26,001 lbs.
B. 26,001 lbs or more, including any towed unit over 10,000 lbs.
C. 26,001 lbs or more, provided any towed unit is less than 10,000 lbs.
D. Less than 16,000 lbs used for commercial purposes.
Answer: C
Conceptual Explanation: In Illinois, Class B applies to single vehicles weighing 26,001 lbs
or more, and allows towing a trailer not in excess of 10,000 lbs.
2. Under the ‘Basic Speed Law’, what determines the safe speed for your vehicle?
A. The posted speed limit minus 5 mph.
B. The speed of the fastest vehicle in your lane.
C. The manufacturer’s recommended cruising speed.
,D. Existing road, weather, and traffic conditions.
Answer: D
Conceptual Explanation: Safe speed is always determined by current conditions,
regardless of the posted limit, to ensure the vehicle can stop safely.
3. When inspecting a vehicle with air brakes, what is the maximum acceptable leakage rate
during a static leakage test for a single vehicle?
A. 2 psi per minute.
B. 1 psi per minute.
C. 3 psi per minute.
D. 5 psi per minute.
Answer: A
Conceptual Explanation: For a single vehicle (Class B), the air leakage rate should be no
more than 2 psi in one minute with the engine off and brakes released.
4. Which of these is the most important reason for being a ‘defensive driver’?
A. To be prepared for the unpredictable actions of other road users.
B. To protect the vehicle and cargo from damage.
C. To avoid tickets and maintain a clean record.
D. To maintain a higher average speed during long trips.
, Answer: A
Conceptual Explanation: Defensive driving focuses on anticipating hazards and the
mistakes of others to prevent accidents before they occur.
5. If you are driving a 40-foot vehicle at 45 mph, what is the minimum safe following
distance?
A. 4 seconds.
B. 6 seconds.
C. 5 seconds.
D. 8 seconds.
Answer: C
Conceptual Explanation: The rule is 1 second for every 10 feet of vehicle length at speeds
below 40 mph, plus an additional second for speeds over 40 mph. 4 + 1 = 5 seconds.
6. What causes ‘brake fade’?
A. Air pressure dropping below 60 psi.
B. Excessive heat causing chemical changes in the brake lining.
C. Moisture in the air tanks freezing the lines.
D. Using the parking brake instead of the service brake.
Answer: B
PROFESSIONAL EXAMINATION 2027
QUESTIONS AND ANSWERS
1. A Class B Non-CDL license is required in Illinois for any single vehicle with a Gross Vehicle
Weight Rating (GVWR) of:
A. 16,001 lbs or more, but less than 26,001 lbs.
B. 26,001 lbs or more, including any towed unit over 10,000 lbs.
C. 26,001 lbs or more, provided any towed unit is less than 10,000 lbs.
D. Less than 16,000 lbs used for commercial purposes.
Answer: C
Conceptual Explanation: In Illinois, Class B applies to single vehicles weighing 26,001 lbs
or more, and allows towing a trailer not in excess of 10,000 lbs.
2. Under the ‘Basic Speed Law’, what determines the safe speed for your vehicle?
A. The posted speed limit minus 5 mph.
B. The speed of the fastest vehicle in your lane.
C. The manufacturer’s recommended cruising speed.
,D. Existing road, weather, and traffic conditions.
Answer: D
Conceptual Explanation: Safe speed is always determined by current conditions,
regardless of the posted limit, to ensure the vehicle can stop safely.
3. When inspecting a vehicle with air brakes, what is the maximum acceptable leakage rate
during a static leakage test for a single vehicle?
A. 2 psi per minute.
B. 1 psi per minute.
C. 3 psi per minute.
D. 5 psi per minute.
Answer: A
Conceptual Explanation: For a single vehicle (Class B), the air leakage rate should be no
more than 2 psi in one minute with the engine off and brakes released.
4. Which of these is the most important reason for being a ‘defensive driver’?
A. To be prepared for the unpredictable actions of other road users.
B. To protect the vehicle and cargo from damage.
C. To avoid tickets and maintain a clean record.
D. To maintain a higher average speed during long trips.
, Answer: A
Conceptual Explanation: Defensive driving focuses on anticipating hazards and the
mistakes of others to prevent accidents before they occur.
5. If you are driving a 40-foot vehicle at 45 mph, what is the minimum safe following
distance?
A. 4 seconds.
B. 6 seconds.
C. 5 seconds.
D. 8 seconds.
Answer: C
Conceptual Explanation: The rule is 1 second for every 10 feet of vehicle length at speeds
below 40 mph, plus an additional second for speeds over 40 mph. 4 + 1 = 5 seconds.
6. What causes ‘brake fade’?
A. Air pressure dropping below 60 psi.
B. Excessive heat causing chemical changes in the brake lining.
C. Moisture in the air tanks freezing the lines.
D. Using the parking brake instead of the service brake.
Answer: B
