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Author Question: Soot accumulation on the heat exchanger is A) Not possible with a gas furnace B) Caused by ... (Read 41 times)

sjones

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Soot accumulation on the heat exchanger is
 
  A) Not possible with a gas furnace
  B) Caused by incomplete combustion
  C) Normal over a period of years
  D) A natural protective layer for the inside of the heat exchanger

Question 2

Nonferrous metals include:
 
  A) Copper B) Aluminum C) Titanium D) All of the above



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emsimon14

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Answer to Question 1

B

Answer to Question 2

D





 

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