Screen capacity is proportional to (where, S = screen aperture)
A. S
B. $$\frac{1}{{\text{S}}}$$
C. S2
D. $$\sqrt {\text{S}} $$
Answer: Option A
This Question Belongs to Chemical Engineering >> Mechanical Operations
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✅ D. √S (Square root of S)
📘 Explanation (from standard references like McCabe & Perry's):
Screen capacity refers to the amount of material a screen can handle per unit time.
It depends on several factors, but aperture size (S) has a direct influence.
According to standard theory:
Screen capacity
∝
𝑆
Screen capacity∝
S
Where S = screen aperture size (opening size in mm or µm).
🔹 Why √S?
Larger apertures allow more material to pass, but not linearly.
Because the flow through openings increases with cross-sectional area, and in screening, practical flow increases roughly with √S due to the geometry and particle dynamics.
✅ Final Answer:
D. √S