1. distributed by capillary attraction
2. melted and deposited at the point where the weld is to be made
3. both of the above
4. not required
melted and deposited at the point where the weld is to be made
1. 4200C
2. 6000C
3. 8000C
4. 9000C
4200C
1. excessive pilling up of weld metal, penetration, wasted electrodes
2. excessive spatter, under cutting along edges, irregular deposits, wasted electrodes
3. too small bead, weak weld and wastes electodes
4. excessive pilling up of weld metal, overlapping without penetration of edges, wases electrodes
excessive spatter, under cutting along edges, irregular deposits, wasted electrodes
1. formation of large globules in an irregules pattern because of wandering of arc, loading to poor fusion with base metal
2. electrode sticking to the base metal and metal not melting and bead resting on top the work, leading to poor fusion and gas holes
3. arc extinction
4. operator hazards
formation of large globules in an irregules pattern because of wandering of arc, loading to poor fusion with base metal
1. more luminous
2. less luminous
3. equally luminous
4. unpredictable
more luminous
1. 11000C
2. 20000C
3. 25000C
4. 35000C
35000C
1. neutral
2. oxidising
3. carbursing
4. all of these
neutral
1. the tip of flame
2. the inner cone
3. next to the inner cone
4. at the outer cone
next to the inner cone
1. a process which uses a mixture of iron oxide and granular aluminium
2. accomplished by mainta-ining a hot molten metal pool between plates
3. aprocess in which arc is maintained under a blanket of flux
4. none of these
aprocess in which arc is maintained under a blanket of flux
1. excessive piling up of weld metal, poor penetration, wasted electrodes
2. excessive spatter, under cutting along edges, irregular deposits, wasted electrodes
3. too small bead, weak weld and wasted electrodes
4. excessive piling up weld metal, overlapping without penetration of edges, wasted electrodes
too small bead, weak weld and wasted electrodes