When free cooling operation is not practical but the system is ...

[moongchi]

When free cooling operation is not practical but the system is operating in an occupied mode, an economizer
  damper will be in its _____.
 
  a. fully open position
  b. fully closed position
  c. half open position
  d. minimum position

Question 2

Poor ventilation may exist in a building when the concentration of carbon dioxide in the building exceeds
  _____.
 
  a. 100 ppm
  b. 500 ppm
  c. 1,000 ppm
  d. 1,300 ppm

[mcabuhat]

Answer to Question 1

d

Answer to Question 2

c

[moongchi]

Thanks for the timely response, appreciate it

[mammy1697]

Wow, this really help