Which method is used to provide clean air to engines of helicopters and turboprop airplanes that have particle separators installed?

Which method is used to provide clean air to engines of helicopters and turboprop airplanes that have particle separators installed?

• A. Positive and Negative Charged Areas to Attract and/or Repel Particulates Out of the Air Flow
• B. Air/Moisture Separators and Washing the Air Clean Utilizing Water Droplets
• C. Direct Inlet Airflow Without Additional Filtration
• D. Sharp Airflow Directional Change to Take Advantage of Inertia and/or Centrifugal Force and Filters or Engine Inlet Screens

Answer: (D)