10. The following are the common electrode width sizes, EXCEPT:
a. 3/32"0
b. 3/16" 0
c. 7/32"0
d. 1/16" 0

11. Which of the following key to maintain a stable arc in welding?
a. correct electrode size and electrode angle
b. correct current
c. correct arc length and travel speed
d. all the above​