Texas CDL Air Brakes, TX CDL #3- Air Brakes- Section 5, CDL Air Brakes
2 Exam Questions with 100% Correct Answers @ 2025!
Terms in this set (202)
Air brake systems combine Service brakes, parking brakes and emergency brakes.
what three different
systems?
When should you drain the air After every working day.
tanks?
Why drain water from the Water can freeze in cold weather and cause brake failure.
compressed air tanks?
Air brake equipped vehicles must A supply pressure gauge and warning signal when psi drops below 60.
have:
What can legally hold a parking or Spring pressure.
emergency brake in position for
a truck, truck tractor or bus?
What makes the total stopping Brake lag distance.
distance for air brakes longer
than that for hydraulic
brakes?
The first thing you should do Stop and safely park ASAP.
when the low air pressure
warning comes on?
The braking power of the spring Depends on the adjustment of the service brakes.
brakes:
The air compressor governor When air is pumped into the air tanks.
controls what?
The application pressure gauge Is being applied to the brakes.
shows the driver how much
pressure:
When you apply pressure to the Pushing against a spring and against air pressure to the brakes.
brake pedal, you are...
, The air compressor is connected Gears or a V-belt
to the engine through...
Which type of brake is the most S-cam brake
common in commercial vehicles?
An application pressure gauge... Shows how much air pressure you are applying to the brakes.
All vehicles with air brakes are A red light, wig wag mechanical arm or a buzzer.
required to have a low pressure
warning signal. This
could be...
To test service brakes you Release the parking brake, move forward slowly and depress brakes.
should...
1. Press on a brake pedal as hard as you can. 2. Release the brakes
Stab braking occurs when you...
when the wheels lock up. 3. Apply the brakes when the wheels
start rolling.
Air brakes take longer to It takes longer for the air to flow through the lines.
stop than hydraulic brakes
because...
The proper way to go down long Apply brakes just hard enough to reduce speed to 5 mph
grades is to... below safe speed then release until back to safe speed and
repeat process.
When should you avoid using the When the brakes are hot.
parking brake?
If your vehicle has an alcohol Check and fill the alcohol level.
evaporator, everyday during
cold weather you should:
During normal driving, spring Air pressure
brakes are usually he'd back by
what?
In air brake vehicles, the parking Whenever the vehicle is parked.
brakes should be used when?
The brake pedal in an air brake Controls the air pressure applied to put on the brakes.
system does what?
If your bus has dual parking Release the spring brakes to move a short distance.
control valves it means that you
can use pressure from a
separate tank to:
2 Exam Questions with 100% Correct Answers @ 2025!
Terms in this set (202)
Air brake systems combine Service brakes, parking brakes and emergency brakes.
what three different
systems?
When should you drain the air After every working day.
tanks?
Why drain water from the Water can freeze in cold weather and cause brake failure.
compressed air tanks?
Air brake equipped vehicles must A supply pressure gauge and warning signal when psi drops below 60.
have:
What can legally hold a parking or Spring pressure.
emergency brake in position for
a truck, truck tractor or bus?
What makes the total stopping Brake lag distance.
distance for air brakes longer
than that for hydraulic
brakes?
The first thing you should do Stop and safely park ASAP.
when the low air pressure
warning comes on?
The braking power of the spring Depends on the adjustment of the service brakes.
brakes:
The air compressor governor When air is pumped into the air tanks.
controls what?
The application pressure gauge Is being applied to the brakes.
shows the driver how much
pressure:
When you apply pressure to the Pushing against a spring and against air pressure to the brakes.
brake pedal, you are...
, The air compressor is connected Gears or a V-belt
to the engine through...
Which type of brake is the most S-cam brake
common in commercial vehicles?
An application pressure gauge... Shows how much air pressure you are applying to the brakes.
All vehicles with air brakes are A red light, wig wag mechanical arm or a buzzer.
required to have a low pressure
warning signal. This
could be...
To test service brakes you Release the parking brake, move forward slowly and depress brakes.
should...
1. Press on a brake pedal as hard as you can. 2. Release the brakes
Stab braking occurs when you...
when the wheels lock up. 3. Apply the brakes when the wheels
start rolling.
Air brakes take longer to It takes longer for the air to flow through the lines.
stop than hydraulic brakes
because...
The proper way to go down long Apply brakes just hard enough to reduce speed to 5 mph
grades is to... below safe speed then release until back to safe speed and
repeat process.
When should you avoid using the When the brakes are hot.
parking brake?
If your vehicle has an alcohol Check and fill the alcohol level.
evaporator, everyday during
cold weather you should:
During normal driving, spring Air pressure
brakes are usually he'd back by
what?
In air brake vehicles, the parking Whenever the vehicle is parked.
brakes should be used when?
The brake pedal in an air brake Controls the air pressure applied to put on the brakes.
system does what?
If your bus has dual parking Release the spring brakes to move a short distance.
control valves it means that you
can use pressure from a
separate tank to:
