Practice question

A school bus diesel uses an intake air (grid) heater to aid cold starting. If the grid heater does not energize, the MOST likely result is:

  1. Easier cold starting
  2. No effect in any weather
  3. Higher rail pressure
  4. Hard cold starting with white smoke and rough running until warm

Answer: D — Hard cold starting with white smoke and rough running until warm

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Practice more: ASE S2 Diesel Engines (School Bus) Practice Questions - ASE S2 - Diesel Engines (School Bus) Certification Exam →