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8797
What method(s) is/are used to provide clean air to the engines of helicopters and turboprop airplanes that have particle (sand and ice) separators installed?
| | A) Positive and negative charged areas to attract and/or repel particulates out of the airflow. |
| | B) Sharp airflow directional change to take advantage of inertia and/or centrifugal force, and filters or engine inlet screens. |
| | C) Air/moisture separators, and ``washing'' the air clean utilizing water droplets. |
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