What would the mixed air temperature be for a system with 20 ...

[Shelles]

What would the mixed air temperature be for a system with 20 outdoor air if the outdoor temperature is 90F and the return air temperature is 80F?
 
  A) 0.8  90F =18F; 18F + 80F = 98F mixed air temperature
  B) (90F + 80F)  0.4 = 68F
  C) 0.2  90F =18F; 0.8  80F = 64F; 18F + 64F = 82F mixed air temperature
  D) (90F + 80F)/2 = 85F mixed air temperature

Question 2

Hot Surface Ignition System (HSI) controls lockout after how many unsuccessful attempts?
 
  A) Two attempts B) The controls do not lock out.
  C) Three or more attempts D) One attempt

[ririgirl15]

Answer to Question 1

C

Answer to Question 2

C

[Shelles]

Thanks for the timely response, appreciate it

[Animal_Goddess]

Gracias!