The three basic types of A-CAC electrode types are copper-coated for direct current, copper-coated for
alternating current, and _____.
a. plain
b. low-alloy steel flux cored
c. stainless steel flux cored
d. nickel-coated
Question 2
The burner gas input rate can be varied in 1 percent increments by using _____.
a. an automatic gas valve
b. a variable-speed inducer fan
c. LP gas
d. a modulating gas valve