What are five variables that a welder can control in SMAW?
a) Current, voltage, travel speed, electrode angle, electrode size
b) Gas flow rate, wire feed speed, arc length, torch angle, workpiece temperature
c) Preheat temperature, interpass temperature, post-weld heat treatment, shielding gas composition, joint fit-up
d) Electrode composition, electrode coating, electrode diameter, electrode polarity, electrode manufacturer