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Dust resistivity affects an electrostatic precipitator because

  • A.It changes the gas viscosity
  • B.It fixes the air to cloth ratio
  • C.Too high gives back corona, too low re-entrainment
  • D.It determines the pressure drop

Answer: C

There is a window of about ten to the seventh to ten to the tenth ohm centimetres within which collection works well. Outside it the dust either holds its charge and discharges back through the layer, or loses it at once and is swept away again.

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