Texas CDL Air Brakes Exam Question With Verified Answers
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Texas CDL Air Brake
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Texas CDL Air Brake
Texas CDL Air Brakes Exam Question With
Verified Answers
Air brake systems combine what three different systems? - answerService brakes, parking
brakes and emergency brakes.
When should you drain the air tanks? - answerAfter every working day.
Why drain water from the compressed air tanks? - a...
Texas CDL Air Brakes Exam Question With
Verified Answers
Air brake systems combine what three different systems? - answer✔Service brakes, parking
brakes and emergency brakes.
When should you drain the air tanks? - answer✔After every working day.
Why drain water from the compressed air tanks? - answer✔Water can freeze in cold weather and
cause brake failure.
Air brake equipped vehicles must have: - answer✔A supply pressure gauge and warning signal
when psi drops below 60.
What can legally hold a parking or emergency brake in position for a truck, truck tractor or bus?
- answer✔Spring pressure.
What makes the total stopping distance for air brakes longer than that for hydraulic brakes? -
answer✔Brake lag distance.
The first thing you should do when the low air pressure warning comes on? - answer✔Stop and
safely park ASAP.
The braking power of the spring brakes: - answer✔Depends on the adjustment of the service
brakes.
The air compressor governor controls what? - answer✔When air is pumped into the air tanks.
The application pressure gauge shows the driver how much pressure: - answer✔Is being applied
to the brakes.
When you apply pressure to the brake pedal, you are... - answer✔Pushing against a spring and
against air pressure to the brakes.
The air compressor is connected to the engine through... - answer✔Gears or a V-belt
Which type of brake is the most common in commercial vehicles? - answer✔S-cam brake
An application pressure gauge... - answer✔Shows how much air pressure you are applying to the
brakes.
All vehicles with air brakes are required to have a low pressure warning signal. This could be... -
answer✔A red light, wig wag mechanical arm or a buzzer.
To test service brakes you should... - answer✔Release the parking brake, move forward slowly
and depress brakes.
Stab braking occurs when you... - answer✔1. Press on a brake pedal as hard as you can. 2.
Release the brakes when the wheels lock up. 3. Apply the brakes when the wheels start rolling.
Air brakes take longer to stop than hydraulic brakes because... - answer✔It takes longer for the
air to flow through the lines.
The proper way to go down long grades is to... - answer✔Apply brakes just hard enough to
reduce speed to 5 mph below safe speed then release until back to safe speed and repeat process.
When should you avoid using the parking brake? - answer✔When the brakes are hot.
If your vehicle has an alcohol evaporator, everyday during cold weather you should: -
answer✔Check and fill the alcohol level.
During normal driving, spring brakes are usually he'd back by what? - answer✔Air pressure
In air brake vehicles, the parking brakes should be used when? - answer✔Whenever the vehicle
is parked.
The brake pedal in an air brake system does what? - answer✔Controls the air pressure applied to
put on the brakes.
If your bus has dual parking control valves it means that you can use pressure from a separate
tank to: - answer✔Release the spring brakes to move a short distance.
A straight truck or bus air brake system should not leak at a rate of more than ____ PSI per
minute with the engine off and the brakes released. - answer✔2
An alcohol evaporator does what? - answer✔Reduces the risk of ice in the air brake valves in
cold weather.
If you must make an emergency stop, you should brake so that you: - answer✔Stay in a straight
line and can steer.
Air loss should not be more than ___ with the engine off and brakes released. - answer✔2 psi per
minute
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