2.  where several loading is encountered and the same plane

3.  to joint two pieces of metals in the same manner as rivets join metals

4.  to joint two pieces per-pendicularly

1.  no flux is required

2.  welding speeds is high

3.  increased corrosion resi-stance

1.  easily spot welded

3.  good for spot welded by spot welding

4.  preferred to be arc weld all types of metals

1.  control of current

2.  control of voltage

3.  control of time duration

2.  time duration of current

3.  pressure applied

4.  changing the size of one electrode

2.  continuous spot welding process

3.  used to form mesh

4.  used to make cantilevers

1.  where longitudinal shear is present

2.  to join two pieces of metals in the same manner as rivets join metals

3.  where efficiency of joint should be 50%

1.  1 V

3.  100 V

4.  1000 V

1.  just at the time of passing the current

2.  just after completion of current

4.  during heating period

1.  TIG

2.  arc

3.   MIG