practice material
Oil and Natural Gas typically form in what environment? - ANS ✔✔marine life preserved at the
bottom of deep lakes
Hydrocarbons refer to which two elements? - ANS ✔✔hydrogen and carbon
Which of the fossil fuels are regional commodities with regional prices? - ANS ✔✔coal and natural gas
Coal is formed in what environment? - ANS ✔✔plants in a humid, swamp environment
Which fossil fuel contains ash? - ANS ✔✔coal
How many ranks of coal are there? - ANS ✔✔four
Which coal rank has the highest heating value? - ANS ✔✔anthracite
What two methods are used to mine coal? - ANS ✔✔deep mining and mountaintop removal
A proximate analysis shows that a certain lignite coal is 10% moisture, 30% volatiles, and 10% ash. What
is the % fixed carbon? - ANS ✔✔1 - .10 - .30 - .10 = 0.5 or 50% carbon
Which coal rank has the highest percentage of volatiles? - ANS ✔✔lignite
Convert a coal price of $90/ton to $/MMBtu - ANS ✔✔$3.46/MMBtu
90/26 = 3.46