Question

How is the sizing of coal processed?

(a) By the use of measuring instruments

(b) By the use of computer software

(c) By crushing and screening

(d) By the mass of the coal

This question was addressed to me in semester exam.

Origin of the question is Coal Technology in chapter Fuels and Combustion of Engineering Chemistry II

Answer 1

Right answer is (c) By crushing and screening

For explanation I would say: Crushing makes the top surface of a coal furnish due to which it becomes easy to handle (by reducing its overall top size). Screening is used to group process particles into ranges by size. By appropriate sizing, transportation of coal becomes easier.