CDL Air Brake Exam Test Questions and Answers Rated A
Modern air brake systems combines three ditterent sys-
service brakes, parking brakes, and emergency brakes
tems.
Oil and water usually collect in compressed air tanks. If
you do not have an automatic tank drain, when should you After every working day.
drain the air tanks?
Why drain water from the compressed air tanks? Water can freeze in cold weather and cause brake failure.
Air brake equipped vehicles must have: A supply pressure gauge.
What can legally hold a parking or emergency brake in
Spring pressure
position for a truck, truck tractor or bus?
Air loss in a straight truck or bus should not be more than
3 psi in one minute
with the engine ott and the brakes on.
Brake as hard as you can, get ott the brakes when the
To make an emergency stop with air brakes, using the stab
wheels lock, get back on the brakes when the wheels start
braking method, you should:
rolling again.
You have to push harder on the brake pedal to control your
You should know that your brakes are fading when:
speed on a downgrade.
To check the free play of manual slack adjusters on s-cam Park on level ground, chock the wheels, and release the
brakes you should: parking brakes.
If the air compressor should develop a leak, what keeps
The one way check valve
the air in the tanks?
Release the brake when you are 5 M.P.H. below your safe
When driving down a long steep hill you should:
speed.
The brake system that applies and releases the brakes
Service brake system.
when the driver uses the brake pedal is the:
The most common type of foundation brakes found on
S-cam drum
heavy vehicles is the:
Vehicles with air brakes must have:
1/3
Modern air brake systems combines three ditterent sys-
service brakes, parking brakes, and emergency brakes
tems.
Oil and water usually collect in compressed air tanks. If
you do not have an automatic tank drain, when should you After every working day.
drain the air tanks?
Why drain water from the compressed air tanks? Water can freeze in cold weather and cause brake failure.
Air brake equipped vehicles must have: A supply pressure gauge.
What can legally hold a parking or emergency brake in
Spring pressure
position for a truck, truck tractor or bus?
Air loss in a straight truck or bus should not be more than
3 psi in one minute
with the engine ott and the brakes on.
Brake as hard as you can, get ott the brakes when the
To make an emergency stop with air brakes, using the stab
wheels lock, get back on the brakes when the wheels start
braking method, you should:
rolling again.
You have to push harder on the brake pedal to control your
You should know that your brakes are fading when:
speed on a downgrade.
To check the free play of manual slack adjusters on s-cam Park on level ground, chock the wheels, and release the
brakes you should: parking brakes.
If the air compressor should develop a leak, what keeps
The one way check valve
the air in the tanks?
Release the brake when you are 5 M.P.H. below your safe
When driving down a long steep hill you should:
speed.
The brake system that applies and releases the brakes
Service brake system.
when the driver uses the brake pedal is the:
The most common type of foundation brakes found on
S-cam drum
heavy vehicles is the:
Vehicles with air brakes must have:
1/3
