Question

What is the main purpose for a blending of coal?

(a) To produce more amount of coal

(b) To produce good quality of coal

(c) To decrease the cost of coal

(d) To produce different types of coal at same time

This question was addressed to me in an interview.

This intriguing question originated from Coal Technology topic in division Fuels and Combustion of Engineering Chemistry II

Answer 1

Correct answer is (b) To produce good quality of coal

The explanation is: The process to mix different types of coal at the same time to increase the efficiency of coal is called blending of coal. This is due to the fact that different types of coal are produced during the coal processing.