CDL AIR BRAKES 2025 LATEST
UPDATE
If your truck has a dual air system and one of the systems is low on pressure: -
ANSWER Either the front or rear brakes will not be fully functional
If your truck has a dual air brake system, and one of the systems is low on pressure: -
ANSWER Either the front or rear brakes will not be operational
The proper use of the brakes when going down a long steep grade after selecting a
proper gear is to brake until your speed is about_______below the posted speed and
release your brake. - ANSWER 5 mph
In case of emergency when driving a vehicle equipped with dual parking control valves,
you should: - ANSWER Plan your movements very carefully
To prevent too much pressure from building up in the system, what is installed? -
ANSWER Safety valve
When the air system is low __________ - ANSWER It will take you longer to stop your
vehicle
Have the air brakes system fixed immediately
You should bring the vehicle to a safe stop
Correct Answer: All of the listed answers
You should use the parking brake - ANSWER Whenever you park
In case of emergency stops, drivers should: - ANSWER Use stab or controlled braking
methods
Typically, at what psi does the air compressor governor stop the compressor from
pumping air? - ANSWER 125 psi
Brake drums should not have cracks longer than what length - ANSWER Longer than
one half the width of the friction area.
The emergency spring brake release knob is______ - ANSWER Round and blue
An automatic wig wag will rise out of your view when the pressure in your system rises
above what psi? - ANSWER 60 psi
UPDATE
If your truck has a dual air system and one of the systems is low on pressure: -
ANSWER Either the front or rear brakes will not be fully functional
If your truck has a dual air brake system, and one of the systems is low on pressure: -
ANSWER Either the front or rear brakes will not be operational
The proper use of the brakes when going down a long steep grade after selecting a
proper gear is to brake until your speed is about_______below the posted speed and
release your brake. - ANSWER 5 mph
In case of emergency when driving a vehicle equipped with dual parking control valves,
you should: - ANSWER Plan your movements very carefully
To prevent too much pressure from building up in the system, what is installed? -
ANSWER Safety valve
When the air system is low __________ - ANSWER It will take you longer to stop your
vehicle
Have the air brakes system fixed immediately
You should bring the vehicle to a safe stop
Correct Answer: All of the listed answers
You should use the parking brake - ANSWER Whenever you park
In case of emergency stops, drivers should: - ANSWER Use stab or controlled braking
methods
Typically, at what psi does the air compressor governor stop the compressor from
pumping air? - ANSWER 125 psi
Brake drums should not have cracks longer than what length - ANSWER Longer than
one half the width of the friction area.
The emergency spring brake release knob is______ - ANSWER Round and blue
An automatic wig wag will rise out of your view when the pressure in your system rises
above what psi? - ANSWER 60 psi
