Two electrostatic precipitators (ESPs) are in series. The fractional e – McqOptions

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1.	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?
A.	100%
B.	93%
C.	80%
D.	65%
Answer» C. 80%

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