TEXAS CDL AIR BRAKES TEST ACTUAL TEST
PAPER 2026 QUESTIONS WITH SOLUTIONS
GRADED A+
◉ Why drain water from the compressed air tanks? Answer: Water
can freeze in cold weather and cause brake failure.
◉ The air brake system for a straight truck or bus should not leak at
a rate of more than __________ psi per minute with the engine off and
the brakes released. Answer: 2
◉ To make an emergency stop with air brakes, using the stab
braking method, you should: Answer: Press on the brake pedal as
hard as you can, release the brakes when the wheels locked, put on
the brakes again when the wheels start rolling.
◉ You should know when your brakes are fading when: Answer: You
have to press the brake pedal harder to control speed on a
downgrade.
◉ If the air compressor should develop a leak, what keeps the air in
the tanks? Answer: The one way check valve.
, ◉ To check the brake slack on S-cam brakes you should park on:
Answer: Park on level ground, chock the wheels, and release the
parking brakes.
◉ The application pressure gauge shows how much pressure you
have: Answer: When you are applying to the brakes.
◉ The spring brakes used on the chambers in a straight truck will
bring you to a stop when air pressure drops below _________ psi.
Answer: 20
◉ The safety valve is set to automatically reduce pressure at _________
psi. Answer: 150
◉ Your truck has a dual air system and one of the system loses its
pressure. What will happen? Answer: Either the front or back brake
will not be fully operational.
◉ If your truck or bus has dual parking control valves, you can use
pressure from a separate tank to: Answer: Release the spring
emergency/parking brakes to move a short distance.
◉ If your truck has a properly functioning dual air brake system and
minimum size air tanks. The air pressure should build from 85 to
100 psi within ________ seconds? Answer: 45
PAPER 2026 QUESTIONS WITH SOLUTIONS
GRADED A+
◉ Why drain water from the compressed air tanks? Answer: Water
can freeze in cold weather and cause brake failure.
◉ The air brake system for a straight truck or bus should not leak at
a rate of more than __________ psi per minute with the engine off and
the brakes released. Answer: 2
◉ To make an emergency stop with air brakes, using the stab
braking method, you should: Answer: Press on the brake pedal as
hard as you can, release the brakes when the wheels locked, put on
the brakes again when the wheels start rolling.
◉ You should know when your brakes are fading when: Answer: You
have to press the brake pedal harder to control speed on a
downgrade.
◉ If the air compressor should develop a leak, what keeps the air in
the tanks? Answer: The one way check valve.
, ◉ To check the brake slack on S-cam brakes you should park on:
Answer: Park on level ground, chock the wheels, and release the
parking brakes.
◉ The application pressure gauge shows how much pressure you
have: Answer: When you are applying to the brakes.
◉ The spring brakes used on the chambers in a straight truck will
bring you to a stop when air pressure drops below _________ psi.
Answer: 20
◉ The safety valve is set to automatically reduce pressure at _________
psi. Answer: 150
◉ Your truck has a dual air system and one of the system loses its
pressure. What will happen? Answer: Either the front or back brake
will not be fully operational.
◉ If your truck or bus has dual parking control valves, you can use
pressure from a separate tank to: Answer: Release the spring
emergency/parking brakes to move a short distance.
◉ If your truck has a properly functioning dual air brake system and
minimum size air tanks. The air pressure should build from 85 to
100 psi within ________ seconds? Answer: 45
