CDL AIR BRAKE ACTUAL TEST PAPER 2026
QUESTIONS WITH SOLUTIONS GRADED A+
◉ When should you use the parking brakes and air brakes at the
same time? Answer: Never
◉ To correct a drive-wheel braking skid, you should Answer: stop
braking turn quickly and counter steer
◉ During your final air brake check, if the air pressure does not
build up fast enough, Answer: the air may drop during driving
◉ As part of your vehicle inspection test, if your vehicle is equipped
with air brakes and has a trailer, you will inspect the air connections
between the truck or tractor and the trailer. Make sure that the
________ are locked in place and free of damage or air leaks. Answer:
Glad hands
◉ On a long or steep downgrade, once you have reached your "safe"
speed, brake until you are traveling Answer: 5 mph slower
◉ If you must make an emergency stop, brake so that Answer: your
vehicle should stay in a straight line
, ◉ The safety valve is set to automatically reduce pressure at
Answer: 150 PSI
◉ In which of the following situations should you NOT apply the
parking brakes? Answer: If the brakes are very hot
◉ When you pull hard on a slack adjuster, if it has more than ________
of free play, the slack adjuster may need adjustment. Answer: 1 inch
◉ How would you check your truck's slack adjusters? Answer: Park
on ground level, turn off the parking brakes, and pull hard on each
slack adjuster. It should'nt move more than 1 inch
◉ You are on a steep downgrade and have reached your safe speed
of 40 mph. You would apply the service brakes until your speed
drops to Answer: 35 mph
◉ To apply the parking brakes under normal conditions, Answer: Let
air out the brake chambers.
◉ To check the slack adjusters on S-cam drum brakes, you should
first Answer: Park at ground level, chock the wheels, and release the
parking brakes
QUESTIONS WITH SOLUTIONS GRADED A+
◉ When should you use the parking brakes and air brakes at the
same time? Answer: Never
◉ To correct a drive-wheel braking skid, you should Answer: stop
braking turn quickly and counter steer
◉ During your final air brake check, if the air pressure does not
build up fast enough, Answer: the air may drop during driving
◉ As part of your vehicle inspection test, if your vehicle is equipped
with air brakes and has a trailer, you will inspect the air connections
between the truck or tractor and the trailer. Make sure that the
________ are locked in place and free of damage or air leaks. Answer:
Glad hands
◉ On a long or steep downgrade, once you have reached your "safe"
speed, brake until you are traveling Answer: 5 mph slower
◉ If you must make an emergency stop, brake so that Answer: your
vehicle should stay in a straight line
, ◉ The safety valve is set to automatically reduce pressure at
Answer: 150 PSI
◉ In which of the following situations should you NOT apply the
parking brakes? Answer: If the brakes are very hot
◉ When you pull hard on a slack adjuster, if it has more than ________
of free play, the slack adjuster may need adjustment. Answer: 1 inch
◉ How would you check your truck's slack adjusters? Answer: Park
on ground level, turn off the parking brakes, and pull hard on each
slack adjuster. It should'nt move more than 1 inch
◉ You are on a steep downgrade and have reached your safe speed
of 40 mph. You would apply the service brakes until your speed
drops to Answer: 35 mph
◉ To apply the parking brakes under normal conditions, Answer: Let
air out the brake chambers.
◉ To check the slack adjusters on S-cam drum brakes, you should
first Answer: Park at ground level, chock the wheels, and release the
parking brakes
