1
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Texas CDL Air Brakes Questions and
Answers (100% Correct Answers) Already
Graded A+
Air brake systems combine what three different systems?— Ans:
Service brakes, parking brakes and emergency brakes.
When should you drain the air tanks?— Ans: After every working
day.
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Why drain water from the compressed air tanks?— Ans: Water
can freeze in cold weather and cause brake failure.
Air brake equipped vehicles must have:— Ans: A supply pressure
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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?— Ans: Spring pressure.
What makes the total stopping distance for air brakes longer than
that for hydraulic brakes?— Ans: Brake lag distance.
The first thing you should do when the low air pressure warning
comes on?— Ans: Stop and safely park ASAP.
The braking power of the spring brakes:— Ans: Depends on the
adjustment of the service brakes.
The air compressor governor controls what?— Ans: When air is
pumped into the air tanks.
The application pressure gauge shows the driver how much
pressure:— Ans: Is being applied to the brakes.
When you apply pressure to the brake pedal, you are...— Ans:
Pushing against a spring and against air pressure to the brakes.
The air compressor is connected to the engine through...— Ans:
Gears or a V-belt
, 2
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Which type of brake is the most common in commercial
vehicles?— Ans: S-cam brake
An application pressure gauge...— Ans: 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...— Ans: A red light, wig wag
mechanical arm or a buzzer.
To test service brakes you should...— Ans: Release the parking
brake, move forward slowly and depress brakes.
Stab braking occurs when you...— Ans: 1. Press on a brake pedal
as hard as you can. 2. Release the brakes when the wheels lock
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up. 3. Apply the brakes when the wheels start rolling.
Air brakes take longer to stop than hydraulic brakes because...—
Ans: It takes longer for the air to flow through the lines.
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The proper way to go down long grades is to...— Ans: 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?— Ans: When
the brakes are hot.
If your vehicle has an alcohol evaporator, everyday during cold
weather you should:— Ans: Check and fill the alcohol level.
During normal driving, spring brakes are usually he'd back by
what?— Ans: Air pressure
In air brake vehicles, the parking brakes should be used when?—
Ans: Whenever the vehicle is parked.
The brake pedal in an air brake system does what?— Ans:
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:— Ans: Release the spring
brakes to move a short distance.
For Expert help and assignment solutions, +254707240657
Texas CDL Air Brakes Questions and
Answers (100% Correct Answers) Already
Graded A+
Air brake systems combine what three different systems?— Ans:
Service brakes, parking brakes and emergency brakes.
When should you drain the air tanks?— Ans: After every working
day.
© 2025 Assignment Expert
Why drain water from the compressed air tanks?— Ans: Water
can freeze in cold weather and cause brake failure.
Air brake equipped vehicles must have:— Ans: A supply pressure
Guru01 - Stuvia
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?— Ans: Spring pressure.
What makes the total stopping distance for air brakes longer than
that for hydraulic brakes?— Ans: Brake lag distance.
The first thing you should do when the low air pressure warning
comes on?— Ans: Stop and safely park ASAP.
The braking power of the spring brakes:— Ans: Depends on the
adjustment of the service brakes.
The air compressor governor controls what?— Ans: When air is
pumped into the air tanks.
The application pressure gauge shows the driver how much
pressure:— Ans: Is being applied to the brakes.
When you apply pressure to the brake pedal, you are...— Ans:
Pushing against a spring and against air pressure to the brakes.
The air compressor is connected to the engine through...— Ans:
Gears or a V-belt
, 2
For Expert help and assignment solutions, +254707240657
Which type of brake is the most common in commercial
vehicles?— Ans: S-cam brake
An application pressure gauge...— Ans: 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...— Ans: A red light, wig wag
mechanical arm or a buzzer.
To test service brakes you should...— Ans: Release the parking
brake, move forward slowly and depress brakes.
Stab braking occurs when you...— Ans: 1. Press on a brake pedal
as hard as you can. 2. Release the brakes when the wheels lock
© 2025 Assignment Expert
up. 3. Apply the brakes when the wheels start rolling.
Air brakes take longer to stop than hydraulic brakes because...—
Ans: It takes longer for the air to flow through the lines.
Guru01 - Stuvia
The proper way to go down long grades is to...— Ans: 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?— Ans: When
the brakes are hot.
If your vehicle has an alcohol evaporator, everyday during cold
weather you should:— Ans: Check and fill the alcohol level.
During normal driving, spring brakes are usually he'd back by
what?— Ans: Air pressure
In air brake vehicles, the parking brakes should be used when?—
Ans: Whenever the vehicle is parked.
The brake pedal in an air brake system does what?— Ans:
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:— Ans: Release the spring
brakes to move a short distance.
