Before using, vacuum gauges using electronic transducers must be: ...

[washai]

Before using, vacuum gauges using electronic transducers must be:
 
  A) Calibrated to 0 microns.
  B) Electronic vacuum transducers are extremely accurate and do not require calibration.
  C) Calibrated to the number on the vacuum transducer.
  D) Calibrated to atmospheric pressure.

Question 2

How can using the wrong type of dye in a manometer make water column measurements inaccurate?
 
  A) An incorrect dye might not show up under ultraviolet light.
  B) Only the correct dye can be seen in a manometer.
  C) An incorrect dye might not be compatible with the refrigerant in the system.
  D) If the dye has a specific gravity other than 1.00

[scrocafella]

Answer to Question 1

C

Answer to Question 2

D