What should be done when checking the refrigerant charge of an ...

[BRWH]

What should be done when checking the refrigerant charge of an operating packaged unit?
 
  a. Allow time for the operation of the unit to stabilize.
  b. Put the unit in economizer mode.
  c. Open all outdoor air dampers and close the return air dampers.
  d. Remove the supply air fan access panel.

Question 2

A pulsating sound coming from an oil furnace indicates ____
 
  a. the flame is touching the combustion chamber
  b. a defective blower
  c. under-firing
  d. soot buildup on the heat exchanger

[paavo]

Answer to Question 1

a

Answer to Question 2

a

[BRWH]

Thanks for the timely response, appreciate it

[scikid]

Great answer, keep it coming