TEXAS CDL AIR BRAKES TEST CERTIFICATION
EVALUATION 2026 FULL QUESTIONS WITH
SOLUTIONS
◉ Under normal conditions in order to engage the parking brakes
the driver must first Answer: let the air out of the air brake system
◉ Total stopping distance for air brakes is longer than for hydraulic
brakes due to Answer: brake lag
◉ If you must make an emergency stop you should brake so you
Answer: can steer and your vehicle stays in a straight line
◉ The parking or emergency brakes on a heavy vehicle can only be
held in position by some thing that cannot leak away like Answer:
spring pressure
◉ Some air brake systems have an alcohol evaporation what may
happen if you don't keep the unit filled Answer: ice may form in the
air storage tanks or air lines and cause brakes to fail
, ◉ The brake system that applies and releases the brakes when the
driver uses the brake pedal is the _________brake system Answer:
service
◉ Before driving a truck or bus with dual air brake system the
pressure in each system should be at least _______psi Answer: 100psi
◉ Your truck or bus has a dual air brake system if a low air pressure
warning comes on for only one system what should you do Answer:
stop right away and safely park the truck, continue only after the
system is fixed
◉ What happens when your brake drums get very hot Answer: they
expand
◉ How often should the air tanks be drained Answer: daily
◉ An air application gauge shows you Answer: how much air
pressure you are applying to the brakes
◉ The difference between controlled braking and stab braking is
__________ Answer: controlled braking does not lock the wheels stab
braking involves locking the wheels
EVALUATION 2026 FULL QUESTIONS WITH
SOLUTIONS
◉ Under normal conditions in order to engage the parking brakes
the driver must first Answer: let the air out of the air brake system
◉ Total stopping distance for air brakes is longer than for hydraulic
brakes due to Answer: brake lag
◉ If you must make an emergency stop you should brake so you
Answer: can steer and your vehicle stays in a straight line
◉ The parking or emergency brakes on a heavy vehicle can only be
held in position by some thing that cannot leak away like Answer:
spring pressure
◉ Some air brake systems have an alcohol evaporation what may
happen if you don't keep the unit filled Answer: ice may form in the
air storage tanks or air lines and cause brakes to fail
, ◉ The brake system that applies and releases the brakes when the
driver uses the brake pedal is the _________brake system Answer:
service
◉ Before driving a truck or bus with dual air brake system the
pressure in each system should be at least _______psi Answer: 100psi
◉ Your truck or bus has a dual air brake system if a low air pressure
warning comes on for only one system what should you do Answer:
stop right away and safely park the truck, continue only after the
system is fixed
◉ What happens when your brake drums get very hot Answer: they
expand
◉ How often should the air tanks be drained Answer: daily
◉ An air application gauge shows you Answer: how much air
pressure you are applying to the brakes
◉ The difference between controlled braking and stab braking is
__________ Answer: controlled braking does not lock the wheels stab
braking involves locking the wheels
