When testing combustion efficiency, the technician should ...

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When testing combustion efficiency, the technician should measure:
 
  A) Stack temperature, ambient temperature, and CO2 flue gas percentage.
  B) Stack temperature, flue gas density, and flue gas water percentage.
  C) Oil pump pressure, stack temperature, ambient temperature, and CO2 flue gas percentage.
  D) Ambient temperature, return air temperature, supply air temperature, and stack temperature.

Question 2

An industry rule-of-thumb concerning airflow is that there should be what CFM of airflow per ton across the evaporator?
 
  A) 1,000 B) 200 C) 400 D) 100

[aidanmbrowne]

Answer to Question 1

A

Answer to Question 2

C

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