Question: How To Do A Static Brake Test On Nys School Bus?

How do you test air brakes on a school bus?

Start the bus and let the air pressure build to at least 90 psi. Step on the brake pedal and put the bus into gear. Slowly take your foot off the brake and gently press the accelerator. The bus should not move.

What is the 7 step air brake test?

The Seven-Step Air Brake check is designed to test the governor cut-in and cut-out pressures, air pressure leakage, warning buzzer, brake valves and air pressure rebuild rates. Brakes off means the yellow and/or red valve is pushed in (on = valve out).

What are the five basic components of an air brake system?

5 Basic Components of an Air Brake System in Trucks

  • Air compressor.
  • Reservoirs.
  • Foot valve.
  • Brake chambers.
  • Brake shoes and drums.

What is the first step of the air brake test?

Before starting the air brake test, park the vehicle on a flat surface, apply spring brakes and wheel chokes. Start testing with the low air warning device.

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How do you start an air brake on a truck?

How to Release Air Brakes

  1. Start the truck by turning the ignition key to the “Start” position.
  2. Locate the air pressure gauge on the dash.
  3. Observe the needle in the air pressure gauge as it rises while the truck is idling.
  4. Allow the air pressure to build to 120 pounds of air.

How many questions can you miss on air brakes?

On a 20-question test, you can miss four questions. Often the air brake test is added to the general knowledge exam for first-time CDL drivers. While the general information is standardized throughout the United States, each state creates its test and focuses on different information on the written exam.

What is stab braking?

The stab braking method for emergency stops involves fully applying the brakes until they lock up. The brakes are then released until the wheels start rolling, then the process is repeated.

How can you tell if your air brakes are leaking?

Quote From The CDL Manual: Test air leakage rate: With a fully-charged air system (typically 125 psi), turn off the engine, release the service brake, and time the air pressure drop. The loss rate should be less than 2 psi in 1 minute for single vehicles and less than 3 psi in 1 minute for combination vehicles.

Which of these is not a brake check you normally do during your walk around inspection?

42. Which of these is not a brake check you normally do during your walk around inspection? Brake adjustment.

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