Machine Design MCQ Set 1 1. Find the operation where diffusion of solids not occurs a) Adsorption b) Leaching c) Drying d) Distillation AnswerAnswer: d [Reason:] Distillation is the liquid-liquid operation where no diffusion on solid is possible. 2. Find the diffusivity through slab if N flux of A 4 mol/sq.m sec, concentration difference is…