TEXAS CDL AIR BRAKES TEST
COMPREHENSIVE SCRIPT 2026 QUESTIONS
AND SOLUTIONS
◉ If the spring brakes are on, when should you push the brake
pedal? Answer: Never
◉ Brakes fading Answer: You have to push harder on the brake
pedal to control your downhill speed.
◉ Spring brakes Answer: Never push the brake pedal when the
spring brakes are on.
◉ Fanning the brake pedal Answer: May result in a loss of air
pressure.
◉ Low air pressure warning Answer: Must come on before pressure
in the service tanks falls below 60 PSI.
◉ Dual parking control valves Answer: Can use pressure from a
separate tank to release the emergency/spring/parking brakes in
order to move a short distance.
, ◉ Brake pedal in an air brake system Answer: Controls the air
pressure applied to put on the brakes.
◉ Checking free play of manual slack adjusters Answer: Park on
level ground, chock the wheel, release the parking brake, and pull
the slack adjusters.
◉ Parking or emergency brakes Answer: Can be legally held on by
spring pressure.
◉ Emergency stab braking Answer: Press hard on the brake pedal
and apply full pressure on the hand valve until you stop.
◉ Common foundation brake on heavy equipment Answer: S-Cam.
◉ Dual air brake system low pressure Answer: Either the front or
rear brakes will not be fully functional.
◉ Low pressure warning light Answer: Stop and safely park as soon
as possible.
◉ Use of parking brakes Answer: Should be used anytime the vehicle
is parked.
COMPREHENSIVE SCRIPT 2026 QUESTIONS
AND SOLUTIONS
◉ If the spring brakes are on, when should you push the brake
pedal? Answer: Never
◉ Brakes fading Answer: You have to push harder on the brake
pedal to control your downhill speed.
◉ Spring brakes Answer: Never push the brake pedal when the
spring brakes are on.
◉ Fanning the brake pedal Answer: May result in a loss of air
pressure.
◉ Low air pressure warning Answer: Must come on before pressure
in the service tanks falls below 60 PSI.
◉ Dual parking control valves Answer: Can use pressure from a
separate tank to release the emergency/spring/parking brakes in
order to move a short distance.
, ◉ Brake pedal in an air brake system Answer: Controls the air
pressure applied to put on the brakes.
◉ Checking free play of manual slack adjusters Answer: Park on
level ground, chock the wheel, release the parking brake, and pull
the slack adjusters.
◉ Parking or emergency brakes Answer: Can be legally held on by
spring pressure.
◉ Emergency stab braking Answer: Press hard on the brake pedal
and apply full pressure on the hand valve until you stop.
◉ Common foundation brake on heavy equipment Answer: S-Cam.
◉ Dual air brake system low pressure Answer: Either the front or
rear brakes will not be fully functional.
◉ Low pressure warning light Answer: Stop and safely park as soon
as possible.
◉ Use of parking brakes Answer: Should be used anytime the vehicle
is parked.
