CDL AIR BRAKE FINAL PAPER 2026 QUESTIONS
WITH FULL ANSWERS
◉ Excessive use of the service brakes result in overheating, which
can lead to: Answer: Expansion of the brake drums
◉ Repeatedly pressing and releasing (fanning) the brake pedal may
result in: Answer: A loss of brake air pressure
◉ The brake pedal in an air brake system: Answer: Controls the air
pressure applied to put on the brakes
◉ You should know that your brakes are fading when: Answer: You
have to push harder on the brake pedal to control your speed on a
downgrade
◉ Your truck or bus has a dual air break system. If a low air pressure
warning comes on for only one system, what should you do?
Answer: Stop right away and safely. Continue only after the system is
fixed.
◉ Under ideal conditions, a truck with air brakes going 55 miles per
hour would require a stopping distance of: Answer: More than 300
feet
, ◉ Modern air brake systems combine three different systems. They
are the service, parking, and the _______ brakes. Answer: Emergency
◉ Total stopping distance for air brakes is longer than that for
hydraulic brakes due to _____ distance Answer: Brake lag
◉ Emergency controlled braking is when when you: Answer: Apply
the brakes as hard as you can without locking the wheels.
◉ If you do not have automatic tank drains, how often should you
drain the oil and water from the bottom of compressed air storage
air tanks? Answer: At the end of each day of driving
◉ If your vehicle has an alcohol evaporator, every day during cold
weather you should: Answer: Check and fill the alcohol level
◉ The most common type of foundation brake found on heavy
vehicles is the: Answer: S-cam drum
◉ The air brake lag distance at 55 miles per hour on dry pavement
adds about _____ feet to your stopping distance Answer: 32
WITH FULL ANSWERS
◉ Excessive use of the service brakes result in overheating, which
can lead to: Answer: Expansion of the brake drums
◉ Repeatedly pressing and releasing (fanning) the brake pedal may
result in: Answer: A loss of brake air pressure
◉ The brake pedal in an air brake system: Answer: Controls the air
pressure applied to put on the brakes
◉ You should know that your brakes are fading when: Answer: You
have to push harder on the brake pedal to control your speed on a
downgrade
◉ Your truck or bus has a dual air break system. If a low air pressure
warning comes on for only one system, what should you do?
Answer: Stop right away and safely. Continue only after the system is
fixed.
◉ Under ideal conditions, a truck with air brakes going 55 miles per
hour would require a stopping distance of: Answer: More than 300
feet
, ◉ Modern air brake systems combine three different systems. They
are the service, parking, and the _______ brakes. Answer: Emergency
◉ Total stopping distance for air brakes is longer than that for
hydraulic brakes due to _____ distance Answer: Brake lag
◉ Emergency controlled braking is when when you: Answer: Apply
the brakes as hard as you can without locking the wheels.
◉ If you do not have automatic tank drains, how often should you
drain the oil and water from the bottom of compressed air storage
air tanks? Answer: At the end of each day of driving
◉ If your vehicle has an alcohol evaporator, every day during cold
weather you should: Answer: Check and fill the alcohol level
◉ The most common type of foundation brake found on heavy
vehicles is the: Answer: S-cam drum
◉ The air brake lag distance at 55 miles per hour on dry pavement
adds about _____ feet to your stopping distance Answer: 32
