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Heavy Duty Equipment Technician Red Seal Exam Prep · Question

Common DEF (diesel exhaust fluid) is:

AdBlue / ISO 22241.

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Question: Common DEF (diesel exhaust fluid) is:

Answer options: ✅ 32.5% urea / 67.5% deionized water

  • Diesel
  • Engine oil
  • Coolant

Correct answer: 32.5% urea / 67.5% deionized water

Explanation: AdBlue / ISO 22241.

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