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Author Question: Why do direct spark ignition systems use flame rectification for flame safety? A) flame ... (Read 91 times)

geodog55

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on: Jul 27, 2018
Why do direct spark ignition systems use flame rectification for flame safety?
 
  A) flame rectification is much faster than anything that relies on heat
  B) the flame rod can double as a thermocouple for older furnaces
  C) flame rectification is less complicated than using a thermocouple
  D) flame rectification is the oldest flame producing technology

Question 2

How does the presence of 7 to 9 percent CO2 in flue gas reflect heating unit performance?
 
  A) It indicates a possible gas leak. B) It indicates that the unit is running efficiently.
  C) It indicates the level of CO2 is neutral. D) It indicates a lack of efficiency.


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britb2u

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Reply #1 on: Jul 27, 2018
Answer to Question 1

A

Answer to Question 2

B


geodog55

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Reply 2 on: Jul 27, 2018
Wow, this really help

blakcmamba

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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