11 Questions
Which of the following is NOT one of the main groups of coal classified by the American Society for Testing and Materials (ASTM)?
Sub-bituminous
What is the main difference between anthracite coal and bituminous coal?
Bituminous coal has a higher percentage of volatile matter than anthracite coal.
Which type of coal is the largest group and tends to produce a sticky, cohesive mass when heated?
Bituminous
Which type of coal is black in color, has high moisture content, and disintegrates when exposed to air?
Lignite coal
What is the calorific value of Bituminous A coal in kilojoules per kilogram (kJ/kg)?
32,564
Which type of coal has the highest volatile matter content?
Bituminous coal
What is the combustion equation for carbon?
carbon + oxygen -> carbon dioxide
According to the text, what is the equation for the combustion of hydrogen?
hydrogen + oxygen -> water vapour
What is the mass of dry flue gas produced per kilogram of fuel in Example 15?
16.44 kg
What is the actual air supplied for the combustion of 1 kg of fuel in Example 15?
15.98 kg air/kg fuel
What is the stoichiometric air required for the combustion of 1 kg of fuel in Example 15?
2.47 kg air/kg fuel
Test your knowledge on coal classifications and combustion characteristics with this quiz. Learn about the different groups and sub-classifications of coal, as well as how to analyze combustion equations. Get ready to become an expert in coal properties and combustion!
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