Practice question

Which emission control device in diesel engines is designed to capture and burn off particulate matter (soot) from the exhaust gas?

  1. Exhaust Gas Recirculation (EGR) valve
  2. Selective Catalytic Reduction (SCR) catalyst
  3. Diesel Particulate Filter (DPF)
  4. Three-way catalytic converter

Answer: C — Diesel Particulate Filter (DPF)

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