Which of the following gaseous fuels has the lowest calorific value ?
Correct answer: D. Blast furnace gas
- A. Gobar gas
- B. Refinery gas
- C. Converter gas
- D. Blast furnace gas
Explanation
Blast furnace gas has the lowest heating value because most of it is nitrogen, with substantial carbon dioxide and only a small amount of carbon monoxide. Gobar gas and refinery gas contain much higher proportions of combustible hydrocarbons.
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