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  • Civil Engg. (GATE) 2007
  • Two electrostatic precipitators (ESPs) are in series. The...
Multiple choice

Two electrostatic precipitators (ESPs) are in series. The fractional efficiencies of the upstream and downstream ESPs for size dp are 80% and 65% respectively. What is the overall efficiency of the system for the same dp?

  1. 100%

  2. 93%

  3. 80%

  4. 65%

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

 Overall efficiency = 80% + 20% x 0.65 = 93%.

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