e What do you mean by viscosity index and explain all the

Last updated: 6/21/2023

e What do you mean by viscosity index and explain all the terms involved in formula A coal has the following composition by weight C 90 O 3 S 0 5 N 0 5 and ash 2 5 Net calorific value of the coal was found to be 8 490 5 kcal kg Calculate the of hydrogen and higher calorific value of this coal 5 a For the formation of coal huge quantities of vegetable matter were accumulated and