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In seive plate column, holes are drilled or punched in sizes ranging from 2.5 to 12 mm (5 mm being widely used). The hole pitch is normally __________ times the hole diameter to give the required hole area. | |
A. | 0.5 to 1.5 [Wrong Answer] |
B. | 2.5 to 4.0 [Correct Answer] |
C. | 5 to 10 [Wrong Answer] |
D. | 10 to 15 [Wrong Answer] |