Impedance is the combined effect of:

Impedance is the combined effect of:
 
  A) DC resistance and AC resistance.
  B) Resistance, inductive reactance, and capacitive reactance.
  C) Wattage and amperage.
  D) Potential and current.

 Q. 2

What is the normal pressure range for compound pressure gauges made for use on R-410a systems?
 
  A) 0 - 30 Hg vacuum and 0 - 120 psig pressure B) 0 - 500 psig pressure
  C) 0 - 30 Hg vacuum and 0 - 350 psig pressure D) 0 - 800 psig pressure

 Q. 3

Since a typical GTAW procedure uses no flux, it is usually not necessary to _____.
 
  a. perform postweld cleaning
  b. use a filler metal
  c. wear welding gloves
  d. ventilate the work area