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State whether the following is true or false.
Collection efficiency can exceed one for certain droplet pairs.

  • A.True
  • B.False
  • C.True only at large scales
  • D.False only at small scales

Answer: A

Wake capture behind a falling collector can draw in droplets from slightly outside the geometric cross section. The effect is modest but is well documented for particular size ratios. Wake capture is strongest at intermediate radius ratios.

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