Before a steel plate is used for practice welding, mill scale on the plate is removed because the DCEN used in
GTAW has little or no _____.
a. electrical conductance
b. flux resistance
c. arcing ability
d. cleaning action
Question 2
If a hard hat is required during overhead cutting or welding, it should allow the attachment of _____.
a. a rear deflector and a face shield
b. a front deflector and ear muffs
c. cotton or leather spats
d. an oxygen tank for breathing