When testing combustion efficiency, the technician should measure ...

[Frost2351]

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

Question 2

What happens when trying to weld non-weldable aluminum alloys?
 
  A) They will harden B) They will crack
  C) Filler metal will not coalesce D) All of the above

[jaymee143]

Answer to Question 1

C

Answer to Question 2

B

[Frost2351]

Excellent

[scikid]

Wow, this really help