Preheating of ______________ the flame temperature?
Correct answer: C. Either the fuel or the air or both, increases
- A. The gaseous fuel before combustion decreases
- B. Combustion air decreases
- C. Either the fuel or the air or both, increases
- D. Either the fuel or the air does not affect
Explanation
Preheating the fuel, the combustion air, or both supplies sensible heat before reaction, so less heat is needed to raise the products to flame temperature and the adiabatic flame temperature increases.
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