1.

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
B. 2.5 to 4.0
C. 5 to 10
D. 10 to 15
Answer» C. 5 to 10


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