The upper temperature for the flue gases of a natural-draft furnace is
A. [tex]$400^{\circ} F$
B. $250^{\circ} F$
C. $600^{\circ} F$
D. $700^{\circ} F$[/tex]
Answer (2)
The upper temperature for the flue gases of a natural-draft furnace is typically around 40 0 F ◯ to 60 0 F ◯ , with 60 0 F ◯ considered the upper limit. Thus, the correct answer is C. 60 0 F ◯ .
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The problem asks for the upper temperature of flue gases in a natural-draft furnace.
The typical range for flue gas temperatures is 40 0 ∘ F to 60 0 ∘ F .
Considering the options, 60 0 ∘ F is the most appropriate upper limit.
The final answer is 60 0 ∘ F .
Explanation
Understanding the Problem The question asks for the upper temperature for the flue gases of a natural-draft furnace. We need to select the correct temperature from the given options.
Analyzing the Options The options are: A. 40 0 ∘ F B. 25 0 ∘ F C. 60 0 ∘ F D. 70 0 ∘ F Typical flue gas temperatures for natural-draft furnaces are usually in the range of 40 0 ∘ F to 60 0 ∘ F .
Determining the Upper Limit Considering the typical range, the upper limit would be closer to 60 0 ∘ F . While 70 0 ∘ F is also an option, it is less common as an upper limit for natural-draft furnaces.
Final Answer Therefore, the most appropriate answer is C. 60 0 ∘ F .
Examples
Understanding flue gas temperatures is crucial in designing and operating furnaces efficiently. For example, in a power plant, maintaining optimal flue gas temperatures ensures efficient heat transfer and reduces emissions. If the temperature is too low, condensation can occur, leading to corrosion. If it's too high, it can damage the equipment and increase the risk of releasing harmful pollutants. Therefore, selecting the right materials and operating conditions based on flue gas temperature is essential for safety and efficiency.
