Texas CDL Air Brakes Exam Questions and
answers 100% verified correct Newest
edition
Air brake systems combine what three different systems? - Correct Answers Service brakes,
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
parking brakes and emergency brakes.
II! II! II! II! II!
II! When should you drain the air tanks? - Correct Answers After every working day.
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! Why drain water from the compressed air tanks? - Correct Answers Water can freeze in cold
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! weather and cause brake failure. II! II! II! II!
II! Air brake equipped vehicles must have: - Correct Answers A supply pressure gauge and warning
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! signal when psi drops below 60.
II! II! II! II! II!
II! What can legally hold a parking or emergency brake in position for a truck, truck tractor or bus? -
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! Correct Answers Spring pressure. II! II! II! II! II! II!
II! What makes the total stopping distance for air brakes longer than that for hydraulic brakes? -
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! Correct Answers Brake lag distance. II! II! II! II! II! II! II!
II! The first thing you should do when the low air pressure warning comes on? - Correct Answers
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! Stop and safely park ASAP.
II! II! II! II!
II! The braking power of the spring brakes: - Correct Answers Depends on the adjustment of the
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! service brakes. II!
, II! The air compressor governor controls what? - Correct Answers When air is pumped into the air
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! tanks.
II! The application pressure gauge shows the driver how much pressure: - Correct Answers Is being
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! applied to the brakes. II! II! II!
II! When you apply pressure to the brake pedal, you are... - Correct Answers Pushing against a
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! spring and against air pressure to the brakes.
II! II! II! II! II! II! II!
II! The air compressor is connected to the engine through... - Correct Answers Gears or a V-belt
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! Which type of brake is the most common in commercial vehicles? - Correct Answers S-cam
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! brake
II! An application pressure gauge... - Correct Answers Shows how much air pressure you are
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! applying to the brakes. II! II! II!
II! All vehicles with air brakes are required to have a low pressure warning signal. This could be... -
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! Correct Answers A red light, wig wag mechanical arm or a buzzer.
II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! To test service brakes you should... - Correct Answers Release the parking brake, move forward
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! slowly and depress brakes. II! II! II!
II! Stab braking occurs when you... - Correct Answers 1. Press on a brake pedal as hard as you can.
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! 2. Release the brakes when the wheels lock up. 3. Apply the brakes when the wheels start rolling.
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! Air brakes take longer to stop than hydraulic brakes because... - Correct Answers It takes longer
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! for the air to flow through the lines.
II! II! II! II! II! II! II!
answers 100% verified correct Newest
edition
Air brake systems combine what three different systems? - Correct Answers Service brakes,
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
parking brakes and emergency brakes.
II! II! II! II! II!
II! When should you drain the air tanks? - Correct Answers After every working day.
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! Why drain water from the compressed air tanks? - Correct Answers Water can freeze in cold
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! weather and cause brake failure. II! II! II! II!
II! Air brake equipped vehicles must have: - Correct Answers A supply pressure gauge and warning
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! signal when psi drops below 60.
II! II! II! II! II!
II! What can legally hold a parking or emergency brake in position for a truck, truck tractor or bus? -
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! Correct Answers Spring pressure. II! II! II! II! II! II!
II! What makes the total stopping distance for air brakes longer than that for hydraulic brakes? -
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! Correct Answers Brake lag distance. II! II! II! II! II! II! II!
II! The first thing you should do when the low air pressure warning comes on? - Correct Answers
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! Stop and safely park ASAP.
II! II! II! II!
II! The braking power of the spring brakes: - Correct Answers Depends on the adjustment of the
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! service brakes. II!
, II! The air compressor governor controls what? - Correct Answers When air is pumped into the air
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! tanks.
II! The application pressure gauge shows the driver how much pressure: - Correct Answers Is being
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! applied to the brakes. II! II! II!
II! When you apply pressure to the brake pedal, you are... - Correct Answers Pushing against a
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! spring and against air pressure to the brakes.
II! II! II! II! II! II! II!
II! The air compressor is connected to the engine through... - Correct Answers Gears or a V-belt
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! Which type of brake is the most common in commercial vehicles? - Correct Answers S-cam
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! brake
II! An application pressure gauge... - Correct Answers Shows how much air pressure you are
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! applying to the brakes. II! II! II!
II! All vehicles with air brakes are required to have a low pressure warning signal. This could be... -
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! Correct Answers A red light, wig wag mechanical arm or a buzzer.
II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! To test service brakes you should... - Correct Answers Release the parking brake, move forward
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! slowly and depress brakes. II! II! II!
II! Stab braking occurs when you... - Correct Answers 1. Press on a brake pedal as hard as you can.
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! 2. Release the brakes when the wheels lock up. 3. Apply the brakes when the wheels start rolling.
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! Air brakes take longer to stop than hydraulic brakes because... - Correct Answers It takes longer
II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II! II!
II! for the air to flow through the lines.
II! II! II! II! II! II! II!
