7. For the Electrode code E7018, what is the first two digit represents for?
a. tensile strength
b. shearing strength
c. compressive strength
d. torsional strength

9. General purpose electrodes use for welding steels of 0.25 percent or less carbon.
a. mild steel electrodes
b. low alloy electrodes
c. low hydrogen electrodes
d. hard surfacing electrode​