Practice question

For an air-brake vehicle, why is the air pressure buildup test important?

  1. It confirms the compressor can restore pressure fast enough for safe braking
  2. It proves the fuel pump is working
  3. It measures tire inflation pressure
  4. It replaces the need to inspect brake drums

Answer: A — It confirms the compressor can restore pressure fast enough for safe braking

The correct answer is shown above. Try the full quiz for additional practice.

Practice more: ID CDL General Knowledge Practice Questions - Idaho CDL General Knowledge Test Exam →