19.2.2 mc qs
- 2. A flux prevents the oxidation of molten metal
a) Reduction
b) salts
c) acids
d) oxidation
- 3. The molten puddle under the electrode has to be
protected from the oxygen and nitrogen in the
air.
a) air
b) welding
c) machine
d) All of above
- 4. Some electrode reduces the amount of moisture
that the coating can pick up from humid air
a) water
b) moisture
c) air
d) None of above
- 5. Binders are needed to hold the additives
together
a) Binders
b) bond
c) glue
d) solution
- 6. Iron powder in the coating improves arc behavior
a) behavior
b) Speed
c) acceleration
d) All of above