Question

The moisturizing the coal before introducing into furnace is called as _________

(a) moisturizing

(b) filtering

(c) tempering

(d) combustion

The question was asked by my college director while I was bunking the class.

Question is taken from Analysis of Coal and Selection topic in section Fuel Technologies of Applied Chemistry

Answer 1

Right option is (c) tempering

For explanation I would say: The process of moisturizing the coal is called tempering. Combustion means complete burning. Filtering is the process to remove unwanted contents from the substance.