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What is an MPR rating on air filters?

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What is an MPR rating on air filters?

(a) Magnitude performance rating

(b) Micro-particle performance rating

(c) Macro-particle performance rating

(d) Moles per rate

The question was asked in semester exam.

This is a very interesting question from Sterilisation topic in division Reactor Engineering of Bioprocess Engineering

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Right choice is (b) Micro-particle performance rating

To explain: MPR (Micro-Particle Performance Rating) MPR Rating is a rating system developed by 3M. It rates the manufacturer’s filters and their ability to capture airborne particles smaller than 1 micron.

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