Question

Which of the following fuels has the highest calorific value?

(a) lignite

(b) wood

(c) bituminous

(d) anthracite

Answer 1

Right option is (d) anthracite

Easy explanation: Anthracite has the calorific value 8650-8700k.cal/kg as the highest one. The calorific values of the others are as follows:

Wood-4000-4500k.cal/kg

Bituminous-8000-8500k.cal/kg

Lignite-6500-7100k.cal/kg.