GATE ES · 2025 · ES
Question 60: Particulate pollutants
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Question 60
ESNAT2 marksNeeds review
A particle disperser has 150 spherical particles of uniform density. An air purifier is proposed to be used to remove these particles. The diameter specific number of particles in the dispersed, along with the number removal efficiency of the proposed purifier is shown in the following table:
Diameter of the particle (µm) | Number of particles | Number removal efficiency (%) |
|---|---|---|
1 | 1000 | 99 |
10 | 500 | 75 |
100 | 10 | 10 |
The overall mass removal efficiency of the proposed purifier is ______ %. (rounded off to one decimal place)
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2025ES
GATE ES 2025 · Paper 1
Environmental Science and Engineering · Original paper archive
- Section
- Environmental Science and Engineering
- Question type
- Numerical answer (NAT)
- Marks
- 2 marks
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