Pulverised coal passing through 200 mesh screen has a diameter of 0.074 mm (74 micron). The same passing through 50 mesh screen will have a dia of ____________ mm?
Correct answer: B. 0.30
- A. 0.007
- B. 0.30
- C. 50
- D. 0.014
Explanation
A 50-mesh opening is approximately 0.30 mm, whereas a 200-mesh opening is about 0.074 mm. The coarser 50-mesh screen therefore permits particles of roughly 0.30 mm to pass.
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