Practice question

What are the four primary sequential components of a modern Euro VI heavy-duty exhaust gas aftertreatment system (EATS)?

  1. DOC (Diesel Oxidation Catalyst) $→$ DPF (Diesel Particulate Filter) $→$ SCR (Selective Catalytic Reduction) $→$ ASC (Ammonia Slip Catalyst)
  2. Turbocharger $→$ Radiator $→$ Exhaust pipe $→$ Muffler
  3. SCR catalyst $→$ Diesel Particulate Filter $→$ Intercooler $→$ Carburetor
  4. AdBlue injector $→$ EGR valve $→$ Alternator $→$ Tailpipe

Answer: A — DOC (Diesel Oxidation Catalyst) $→$ DPF (Diesel Particulate Filter) $→$ SCR (Selective Catalytic Reduction) $→$ ASC (Ammonia Slip Catalyst)

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