FL CDL AIR BRAKES TEST: EXAM
MODE ACCURATE 100%
Air tanks must be drained - ANSWER to drain moisture and oil out of the tanks
Air braking takes more time than hydraulic braking because air - ANSWER Takes more
time to flow through the lines than hydraulic fluid.
What is the best way to test your vehicle's low air pressure warning signal? - ANSWER
With the engine off, step on and off the brake pedal to lower the air pressure below 60
psi.
The air compressor will stop pumping air into the air tanks at ___ psi - ANSWER 125
When should you manually adjust an automatic slack adjuster - ANSWER Only if it's
not working properly
With the "controlled braking" method, you - ANSWER Apply the brakes as hard as you
can without locking the wheels
According to federal regulations on air brakes, the brake linings of drum brakes must be
at least ___ thick. - ANSWER 1/4 inch
You can test the air compressor governor by - ANSWER by increasing and decreasing
the air pressure
What is a dual air brake system? - ANSWER A two-brake system: one brake operates
the front brakes, and one operates the back brakes.
Under ideal conditions, the average drivers of a truck or bus equipped with air brakes
and traveling at 55 mph would require what stopping distance? - ANSWER More than
400 feet
If your truck or bus has dual parking control valves, you can use air pressure from a
separate tanks to - ANSWER release the spring emergency/parking brakes.
To check the slack adjusters on S-cam drum brakes, you should first - ANSWER park
on level ground, chock the wheels, and release the parking brakes.
What are spring brakes? - ANSWER If the air brakes leak down, springs apply the
brakes to stop the vehicle.
The parking brake control - ANSWER lets the air out of the brake chambers.
, Your vehicle has a dual air brake system. If a low air pressure warning comes on for just
one of the two systems, what should you do? - ANSWER Stop and park safely.
Continue only after the system has been fixed.
To test the air service brakes, - ANSWER brake firmly while slowly moving forward.
The air compressor governor controls - ANSWER
The service brake system applies - ANSWER the brakes when you depress the brake
pedal during normal driving.
With S-cam drum brakes, when the brake chamber fills with air, air pressure pushes the
push rod out, moving the ____ and thus rotating the ____. - ANSWER slack adjuster;
brake camshaft
To test the static air leakage rate, you should - ANSWER turn off the engine, release
the parking brake, and let the system settle.
You are on a steep downgrade and have reached your safe speed of 40 mph. You
would apply the service brakes until your speed drops to - ANSWER 35 mph
Foundation brakes are located - ANSWER at all wheels.
As part of your vehicle inspection test, if your vehicle is equipped with air brakes and
has a trailer, you will inspect the air connections between the truck or tractor and the
trailer. Make sure that the ___ are locked in place and free of damage or air leaks. -
ANSWER glad hands
A converter dolly with antilock brakes (ABS) is required to have - ANSWER a yellow
lamp on the left side.
The most common type of foundation brake found on vehicles with air brakes is the -
ANSWER S-cam drum brake.
To apply the parking brakes under normal conditions, - ANSWER let the air out of the
brake chambers.
To use antilock brakes properly, you should - ANSWER brake normally.
In which of the following situations should you NOT apply the parking brakes? -
ANSWER If the brakes are very hot
On a long or steep downgrade, once you have reached your "safe" speed, brake until
you are traveling - ANSWER 5 mph slower.
MODE ACCURATE 100%
Air tanks must be drained - ANSWER to drain moisture and oil out of the tanks
Air braking takes more time than hydraulic braking because air - ANSWER Takes more
time to flow through the lines than hydraulic fluid.
What is the best way to test your vehicle's low air pressure warning signal? - ANSWER
With the engine off, step on and off the brake pedal to lower the air pressure below 60
psi.
The air compressor will stop pumping air into the air tanks at ___ psi - ANSWER 125
When should you manually adjust an automatic slack adjuster - ANSWER Only if it's
not working properly
With the "controlled braking" method, you - ANSWER Apply the brakes as hard as you
can without locking the wheels
According to federal regulations on air brakes, the brake linings of drum brakes must be
at least ___ thick. - ANSWER 1/4 inch
You can test the air compressor governor by - ANSWER by increasing and decreasing
the air pressure
What is a dual air brake system? - ANSWER A two-brake system: one brake operates
the front brakes, and one operates the back brakes.
Under ideal conditions, the average drivers of a truck or bus equipped with air brakes
and traveling at 55 mph would require what stopping distance? - ANSWER More than
400 feet
If your truck or bus has dual parking control valves, you can use air pressure from a
separate tanks to - ANSWER release the spring emergency/parking brakes.
To check the slack adjusters on S-cam drum brakes, you should first - ANSWER park
on level ground, chock the wheels, and release the parking brakes.
What are spring brakes? - ANSWER If the air brakes leak down, springs apply the
brakes to stop the vehicle.
The parking brake control - ANSWER lets the air out of the brake chambers.
, Your vehicle has a dual air brake system. If a low air pressure warning comes on for just
one of the two systems, what should you do? - ANSWER Stop and park safely.
Continue only after the system has been fixed.
To test the air service brakes, - ANSWER brake firmly while slowly moving forward.
The air compressor governor controls - ANSWER
The service brake system applies - ANSWER the brakes when you depress the brake
pedal during normal driving.
With S-cam drum brakes, when the brake chamber fills with air, air pressure pushes the
push rod out, moving the ____ and thus rotating the ____. - ANSWER slack adjuster;
brake camshaft
To test the static air leakage rate, you should - ANSWER turn off the engine, release
the parking brake, and let the system settle.
You are on a steep downgrade and have reached your safe speed of 40 mph. You
would apply the service brakes until your speed drops to - ANSWER 35 mph
Foundation brakes are located - ANSWER at all wheels.
As part of your vehicle inspection test, if your vehicle is equipped with air brakes and
has a trailer, you will inspect the air connections between the truck or tractor and the
trailer. Make sure that the ___ are locked in place and free of damage or air leaks. -
ANSWER glad hands
A converter dolly with antilock brakes (ABS) is required to have - ANSWER a yellow
lamp on the left side.
The most common type of foundation brake found on vehicles with air brakes is the -
ANSWER S-cam drum brake.
To apply the parking brakes under normal conditions, - ANSWER let the air out of the
brake chambers.
To use antilock brakes properly, you should - ANSWER brake normally.
In which of the following situations should you NOT apply the parking brakes? -
ANSWER If the brakes are very hot
On a long or steep downgrade, once you have reached your "safe" speed, brake until
you are traveling - ANSWER 5 mph slower.
