Fuels and Combustion
Which of the following is a measure of the agglutinating (i.e., binding) property of coal?

Gray-king index
Caking index
Swelling index
Thickness of plastic layer

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Fuels and Combustion
Lignite is

A coking coal
A black banded coal which burns with a non-smoky yellowish flame
A high rank coal
Can be used for gasification and steam generation

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