NC CDL AIR BRAKES|UPDATED&VERIFIED|100% SOLVED|GUARANTEED SUCCESS
Oil and water usually collect in compressed air tanks. If you do not have an automatic tank drain, when should you drain the air tanks? ✔️After
every working day
Why drain water from the compressed air tanks? ✔️Water can freeze in cold weather and cause brake failure.
The air brake system for a straight truck or bus should not leak at a rate of more than ___ PSI per minute with the engine off and the brakes
released. ✔️2
To make an emergency stop with air brakes using the stab braking method, you should: ✔️Press on the brake pedal as hard as you can, release
the brakes when the wheels lock, put on the brakes again when the wheels start rolling.
You should know that your brakes are fading when: ✔️You have to apply the brake pedal harder to control speed on a downgrade.
If the air compressor should develop a leak, what keeps the air in the tanks? ✔️The one-way check valve.
To check the brake slack on S-cam brakes you should: ✔️Park on level ground, chock the wheels, and release the parking brake.
The application pressure gauge shows how much pressure you have: ✔️When you are applying the brakes.
The spring brakes used on the chambers in a straight truck will bring you to a stop when air pressure drops below ___ PSI. ✔️20
The safety valve is set to automatically reduce pressure at ___ PSI. ✔️150
Your truck has a dual air system and one of the system loses its pressure. What will happen? ✔️Either the front or back brake will not be fully
operational.
If your truck or bus has dual parking control valves, you can use pressure from a separate tank to: ✔️Release the spring emergency/parking
brakes to move a short distance.
During normal driving, spring brakes are usually held back by: ✔️Air pressure.
During normal driving, spring brakes are usually held back by: ✔️Air pressure.
The air compressor stops pumping air at what PSI? ✔️125
The driver must be able to see a warning before pressure in the service air tanks falls below ___ PSI. ✔️55
Excessive use of the service brakes results in overheating, which can lead to: ✔️Expansion of the brake drums.
The most common type of foundation brakes found on heavy vehicles is the: ✔️S-cam drum.
If you must make an emergency stop, brake so you: ✔️Can steer and your vehicle stays in a straight line.
The braking power of the spring brakes: ✔️Depends on the service brakes being in adjustment.
The air brake lag distance at 55 mph on dry pavement adds about ___ feet. ✔️32
Total stopping distance for air brakes is longer than that for hydraulic brakes due to ___ distance. ✔️Brake lag.
It is accepted that too much heat caused by using your brakes too often can also cause: ✔️Brake fade of failure.
Repeatedly pressing and releasing (fanning) the brake pedal may result in: ✔️The loss of brake air pressure.
The brake system that applies and releases the brakes when the driver uses the brake pedal is the _____________ brake system. ✔️Service.
A slack adjuster's free play needs to be adjusted if it is more than about ___ when you pull hard on it. ✔️1 inch.
An air brake system is fully charged at what PSI? ✔️125
The brake pedal in an air brake system: ✔️Controls the air pressure applied to put on the brakes.
Oil and water usually collect in compressed air tanks. If you do not have an automatic tank drain, when should you drain the air tanks? ✔️After
every working day
Why drain water from the compressed air tanks? ✔️Water can freeze in cold weather and cause brake failure.
The air brake system for a straight truck or bus should not leak at a rate of more than ___ PSI per minute with the engine off and the brakes
released. ✔️2
To make an emergency stop with air brakes using the stab braking method, you should: ✔️Press on the brake pedal as hard as you can, release
the brakes when the wheels lock, put on the brakes again when the wheels start rolling.
You should know that your brakes are fading when: ✔️You have to apply the brake pedal harder to control speed on a downgrade.
If the air compressor should develop a leak, what keeps the air in the tanks? ✔️The one-way check valve.
To check the brake slack on S-cam brakes you should: ✔️Park on level ground, chock the wheels, and release the parking brake.
The application pressure gauge shows how much pressure you have: ✔️When you are applying the brakes.
The spring brakes used on the chambers in a straight truck will bring you to a stop when air pressure drops below ___ PSI. ✔️20
The safety valve is set to automatically reduce pressure at ___ PSI. ✔️150
Your truck has a dual air system and one of the system loses its pressure. What will happen? ✔️Either the front or back brake will not be fully
operational.
If your truck or bus has dual parking control valves, you can use pressure from a separate tank to: ✔️Release the spring emergency/parking
brakes to move a short distance.
During normal driving, spring brakes are usually held back by: ✔️Air pressure.
During normal driving, spring brakes are usually held back by: ✔️Air pressure.
The air compressor stops pumping air at what PSI? ✔️125
The driver must be able to see a warning before pressure in the service air tanks falls below ___ PSI. ✔️55
Excessive use of the service brakes results in overheating, which can lead to: ✔️Expansion of the brake drums.
The most common type of foundation brakes found on heavy vehicles is the: ✔️S-cam drum.
If you must make an emergency stop, brake so you: ✔️Can steer and your vehicle stays in a straight line.
The braking power of the spring brakes: ✔️Depends on the service brakes being in adjustment.
The air brake lag distance at 55 mph on dry pavement adds about ___ feet. ✔️32
Total stopping distance for air brakes is longer than that for hydraulic brakes due to ___ distance. ✔️Brake lag.
It is accepted that too much heat caused by using your brakes too often can also cause: ✔️Brake fade of failure.
Repeatedly pressing and releasing (fanning) the brake pedal may result in: ✔️The loss of brake air pressure.
The brake system that applies and releases the brakes when the driver uses the brake pedal is the _____________ brake system. ✔️Service.
A slack adjuster's free play needs to be adjusted if it is more than about ___ when you pull hard on it. ✔️1 inch.
An air brake system is fully charged at what PSI? ✔️125
The brake pedal in an air brake system: ✔️Controls the air pressure applied to put on the brakes.
