Question

What are the percentage of reduced ore taken out starting from bottom?

(a) 98, 87, 47%

(b) 47, 78, 98%

(c) 74, 87, 89%

(d) 74, 87, 98%

I got this question during an internship interview.

This intriguing question originated from Reduction of Iron Oxides topic in division Industrial Applications of Fluidized Beds of Fluidization Engineering

Answer 1

The correct option is (a) 98, 87, 47%

For explanation I would say: At the bottom of bed, the conversion is the most, as we go above the conversion percentage decreases.