TEXAS CDL AIR BRAKES TEST PRACTICE TEST
2026 QUESTIONS WITH CORRECT ANSWERS
◉ If the spring brakes are on when should you push the brake pedal?
Answer: Never
◉ Repeatedly pressing and releasing (fanning) the brake pedal may
result in ? Answer: A loss of air pressure
◉ The driver must be able to see a low air pressure warning which
comes on before pressure in the service air tank falls below_____PSI?
Answer: 60psi
◉ If your truck or bus has dual parking control valves you can use
pressure from a separate tank. Answer: to release the
emergency/spring/parking brakes to move a short distance.
◉ The brake pedal in a air brake system. Answer: controls the air
pressure applied to put on the brakes
◉ To check the free play of manual slack adjusters of s-cam brakes
you should? Answer: park on level ground, chock the wheels release
the parking brakes and pull on the slack adjusters
,◉ Parking or emergency brakes on trucks or buses can be legally
held on by _______ pressure. Answer: Spring
◉ Emergency stab braking is when you Answer: brake and hard as
you can, then release the brakes when the wheels lock up and put on
the brakes again when the wheels start rolling
◉ The most common type of foundation brake found on heavy
vehicles is the Answer: S-Cam
◉ If your truck has dual air brake system and one of the systems is
low on pressure Answer: either the front or rear brakes will not be
fully functional
◉ The most important thing to do when a low pressure warning
light comes on is to Answer: stop and safely park as soon as possible
◉ With air brake equipped vehicles, the parking brakes should be
used Answer: any time the vehicle is parked
◉ The air compressor Governor controls Answer: when air is
pumped into the tanks
, ◉ The stop light switch Answer: turns on the brake light to warn
other drivers behind you
◉ For air brake systems in good condition the air compress
compressor should start pumping at about _______ psi Answer:
100psi
◉ The air loss rate for a straight truck or bus with the engine off and
the parking brakes off and the service brakes on should not be more
than Answer: 3 psi in one minute
◉ The braking power of the spring brakes Answer: depends on the
service brakes being in adjustment
◉ How should you check spring brakes application when air
pressure drops below a certain level Answer: park on level ground,
chock wheels, release parking brake when you have enough
pressure shut the engine off and repeatedly press and release the
pedal
◉ If you are driving down a steep grade and have reached a safe
speed of 40 mph you would apply the service brakes until your sped
drops to ______ mph Answer: 35mph
2026 QUESTIONS WITH CORRECT ANSWERS
◉ If the spring brakes are on when should you push the brake pedal?
Answer: Never
◉ Repeatedly pressing and releasing (fanning) the brake pedal may
result in ? Answer: A loss of air pressure
◉ The driver must be able to see a low air pressure warning which
comes on before pressure in the service air tank falls below_____PSI?
Answer: 60psi
◉ If your truck or bus has dual parking control valves you can use
pressure from a separate tank. Answer: to release the
emergency/spring/parking brakes to move a short distance.
◉ The brake pedal in a air brake system. Answer: controls the air
pressure applied to put on the brakes
◉ To check the free play of manual slack adjusters of s-cam brakes
you should? Answer: park on level ground, chock the wheels release
the parking brakes and pull on the slack adjusters
,◉ Parking or emergency brakes on trucks or buses can be legally
held on by _______ pressure. Answer: Spring
◉ Emergency stab braking is when you Answer: brake and hard as
you can, then release the brakes when the wheels lock up and put on
the brakes again when the wheels start rolling
◉ The most common type of foundation brake found on heavy
vehicles is the Answer: S-Cam
◉ If your truck has dual air brake system and one of the systems is
low on pressure Answer: either the front or rear brakes will not be
fully functional
◉ The most important thing to do when a low pressure warning
light comes on is to Answer: stop and safely park as soon as possible
◉ With air brake equipped vehicles, the parking brakes should be
used Answer: any time the vehicle is parked
◉ The air compressor Governor controls Answer: when air is
pumped into the tanks
, ◉ The stop light switch Answer: turns on the brake light to warn
other drivers behind you
◉ For air brake systems in good condition the air compress
compressor should start pumping at about _______ psi Answer:
100psi
◉ The air loss rate for a straight truck or bus with the engine off and
the parking brakes off and the service brakes on should not be more
than Answer: 3 psi in one minute
◉ The braking power of the spring brakes Answer: depends on the
service brakes being in adjustment
◉ How should you check spring brakes application when air
pressure drops below a certain level Answer: park on level ground,
chock wheels, release parking brake when you have enough
pressure shut the engine off and repeatedly press and release the
pedal
◉ If you are driving down a steep grade and have reached a safe
speed of 40 mph you would apply the service brakes until your sped
drops to ______ mph Answer: 35mph
