Practice question

What is the standard CDL buildup-rate check from 85 to 100 psi?

  1. Pressure should build from 85 to 100 psi within about 45 seconds at governed rpm
  2. Pressure should drop from 100 to 85 psi in 45 seconds
  3. Pressure should stay below 60 psi
  4. Only trailer tires are checked

Answer: A — Pressure should build from 85 to 100 psi within about 45 seconds at governed rpm

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