Practice question

What is the standard recommended mixture ratio of ethylene glycol antifreeze to distilled water for most automotive engine cooling systems?

  1. 100% antifreeze for maximum cooling
  2. 90% antifreeze and 10% water
  3. 50% antifreeze and 50% distilled water
  4. 100% plain water for best cooling

Answer: C — 50% antifreeze and 50% distilled water

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