There are many forms of combustion of combustibles, of which the most likely tempering phenomenon is ().
A. Diffusion combustion B. Premix combustion C. Power combustion D. Evaporative combustion
Answer: B
Comments: Textbook P4: The characteristics of premix combustion are: fast combustion reaction, high temperature, fast flame propagation speed, non-diffusion of reaction mixed gas, and the introduction of a fire source in the combustible mixed gas produces a flame center, which becomes a concentrated source of heat and chemically active particles. If the flow rate is greater than the combustion rate, a stable combustion flame is formed in the tube, the combustion is sufficient, the combustion speed is fast, and the combustion area is high temperature incandescent, such as the combustion of the gas lamp; If the flow rate of the combustible gas mixture at the mouth of the pipe is less than the combustion rate, "tempering" occurs
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