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Front #28

ABTH 100.9A

What are the two methods used to perform a Brake Pipe Leakage Test?

  1. Class 3 Air Brake Test, 20 lb. brake pipe reduction
  2. Class 3 Air Brake Test, Air Flow Method (AFM)
  3. Class 1 Air Brake Test, 20 lb. brake pipe reduction
  4. Air Flow Method (AFM), Brake Pipe Leakage Method
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ABTH 100.9A


Answer: Air Flow Method (AFM), Brake Pipe Leakage Method
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The Air Flow Method (AFM) is the preferred method for performing a Brake Pipe Leakage Test when the locomotive has an air flow meter. The Brake Pipe Leakage Method - which has 9 steps to determine the amount of leakage in your brake pipe system - is to be used when the AFM gauge is not on the locomotive.