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chemical engineering process equipment and plant design
1. A perforated plate has holes of diameter dn arranged in a pitch ph. Each hole has a tube of I.D. dt passing through it. The ligament efficiency is given by
(A): (ph - dh . dt/2)/ph
(B): (ph - dh)/dh
(C): (ph - dh)/ph
(D): (ph - dt)/ph
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