For Indian standard (IS) screens, the mesh number is equal to its aperture size expressed to the nearest deca-micron (0.01 mm). Aperture width of IS screen of mesh number 50 will be approximately _____________ microns?
Correct answer: C. 500
- A. 5
- B. 50
- C. 500
- D. 5000
Explanation
Using the stated approximation, mesh 50 corresponds to 50 decamicrons: 50 × 0.01 mm = 0.50 mm, or about 500 microns. Thus option c follows directly from the convention given in the question.
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