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Higher is the mesh number, smaller will be the aperture size of the screen. It means that the aperture size of a 200 mesh screen will be smaller than that of 20 mesh screen. This is valid for | |
A. | British standard screens. [Wrong Answer] |
B. | German standard screens (DIN 1171) etc. [Wrong Answer] |
C. | American standard screens (ASTM and Tyler standard screens). [Wrong Answer] |
D. | all (a), (b) and (c). [Correct Answer] |