Answer:
A and D
Explanation:
I believe it is A and D because they appear to be the most accurate answers.
Answer:
Welcome ShalomMHNCB Phx
Explanation:
the answer is because I just had this question and I got it wrong so te answer is 0.43
Stack temperatures typically range from 350 to 450 degrees Fahrenheit. A 2.5% efficiency loss occurs for every 100 degrees over that temperature. The majority of buildings schedule annual boiler cleanings at regular intervals, but if you see those figures rise, it's time for a cleaning.
Excess air is required to completely burn the fuel since the air and fuel cannot combine exactly in a burner. Additionally, any leaks in the heater will draw air into the firebox that doesn't pass through the burners since the furnace or boiler firebox operates at a little negative gauge pressure. Fuels that are gaseous, like natural gas, burn more readily than fuels that are liquid or solid. Depending on the fuel type, different surplus air requirements will apply.
Learn more about temperature here-
brainly.com/question/15267055
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Answer:
we don't know what school or class you go to so there's no way of knowing if we have the same one, your best bet is to ask question by question until you have all the answers
