SERIES TEXAS CDL AIR BRAKES COMPLETE QUESTIONS AND CORRECT ANSWERS | GRADED AND THE LATEST SERIES

2025-2026 SERIES
TEXAS CDL AIR BRAKES COMPLETE QUESTIONS AND
CORRECT ANSWERS | GRADED AND THE LATEST
SERIES
Air brake systems combine what three different systems?


Ans: Service brakes, parking brakes and emergency brakes.


Question: When should you drain the air tanks?


Ans: After every working day.


Question: Why drain water from the compressed air tanks?


Ans: Water can freeze in cold weather and cause brake failure.


Question: Air brake equipped vehicles must have:


Ans: A supply pressure gauge and warning signal when psi drops below 60.


Question: What can legally hold a parking or emergency brake in position for

a truck, truck tractor or bus?


Ans: Spring pressure.


Question: What makes the total stopping distance for air brakes longer than

that for hydraulic brakes?


Ans: Brake lag distance.

, 2025-2026 SERIES
Question: The first thing you should do when the low air pressure warning comes

on?


Ans: Stop and safely park ASAP.


Question: The braking power of the spring brakes:


Ans: Depends on the adjustment of the service brakes.


Question: The air compressor governor controls what?


Ans: When air is pumped into the air tanks.


Question: The application pressure gauge shows the driver how much pressure:


Ans: Is being applied to the brakes.


Question: When you apply pressure to the brake pedal, you are...


Ans: Pushing against a spring and against air pressure to the brakes.


Question: The air compressor is connected to the engine through...


Ans: Gears or a V-belt


Question: Which type of brake is the most common in commercial vehicles?


Ans: S-cam brake


Question: An application pressure gauge...