Practice question

After a cold night, a driver finds pressure builds but one brake is slow to release. Which air-brake issue is plausible?

  1. Frozen moisture or contamination restricting a valve or line
  2. A stronger-than-normal ABS system
  3. A license-class upgrade
  4. A properly working low-air warning only

Answer: A — Frozen moisture or contamination restricting a valve or line

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Practice more: Minnesota CDL Air Brakes Test Practice Questions - Minnesota Commercial Driver License (CDL) Air Brakes Knowledge Test Exam →