What is the average heat value of bituminous coal?
A) 12,500 Btu/lb
B) 12,000 Btu/lb
C) 9,000 Btu/lb
D) 7,000 Btu/lb
Question 2
Which type of coal would have been of major economic importance in Illinois?
A) Lignite
B) Subbituminous coal
C) Bituminous coal
D) Anthracite coal