Question : Which is the most popular coal for commercial use?
Option 1: Bituminous
Option 2: Anthracite
Option 3: Peat
Option 4: Lignite
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Correct Answer: Bituminous
Solution : The correct answer is Bituminous.
The most common type of coal used in commerce is Bituminous. It contains 60 to 80 per cent carbon. The coal is suitable for commercial usage due to its calorific value, volatility and ash concentration. Bituminous coal offers the widest range of commercial applications among all coals due to its abundance, low moisture content (less than 3 per cent), relatively high heat value and simplicity of transportation and storage.
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Question : Which of the following is the highest quality coal?
Option 1: Lignite
Option 2: Bituminous
Option 4: Anthracite
Question : Which of the following coals contains ninety per cent carbon?
Option 1: Anthracite
Option 2: Bitumen
Option 3: Lignite
Option 4: Peat
Question : Which of the following is not a commercial source of energy ?
Option 1: Coal
Option 2: Petroleum
Option 3: Natural Gas
Option 4: Firewood
Question : Peat coal has ______ carbon and ______ moisture content.
Option 1: high, low
Option 2: low, high
Option 3: high, high
Option 4: low, low
Question : Which one of the following is a good electrical conductor?
Option 1: Graphite
Option 2: Diamond
Option 3: peat
Option 4: charcoal
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