📊 Fuels And Combustion
Q. Preheating of __________ the flame temperature.
  • (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
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✅ Correct Answer: (C) Either the fuel or the air or both, increases

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