1. same
2. more
3. less
4. unpredictable
less
1. 1-2 k VA/cm2
2. 2.5-40 k VA/cm2
3. 4.5-6.2 k VA/cm2
4. 6.5-8.9 k VA/cm2
4.5-6.2 k VA/cm2
1. a process which uses a mixure of iron oxide and granular aluminium
2. accomplished by main-taining a hot molten metal pool between plates
3. a process in which arc is maintained under a blanket of flux
4. there is nothing called electroslag welding
accomplished by main-taining a hot molten metal pool between plates
1. fine spray of metal
2. molten drops
3. weld pool
4. molecules
fine spray of metal
1. excessive pilling up of weld metal, poor penetration, wasted electrodes
2. excessive spatter, under cutting along edges, irregular deposits, wasted electrodes
3. too small bead, weak and wasted electrode
4. excessive pilling up of weld metal, overlapping without penetration of edges, wasted electrodes
excessive pilling up of weld metal, overlapping without penetration of edges, wasted electrodes
1. process which uses a mixure of iron oxide and granular aluminium
2. accomplished by main-taining a hot molten metal pool between plates
3. a process in which arc is maintained under a blanket of flux
4. no welding process
process which uses a mixure of iron oxide and granular aluminium
1. Non-combustible electrode in combination with helium and d.c. current
2. Combustible electrodes and argon in combination with a.c. current
3. Straight polarity d.c. current
4. Carbon dioxide, because of its excellent penetration and high speed
Non-combustible electrode in combination with helium and d.c. current
1. 0.8:1.0
2. 0:1
3. 1.2:1
4. 2:1
0:1
1. Non-combustible electrode in combination with helium and d.c.current
2. Combustible electrode and argon in combination with d.c.current
3. Straight polarity d.c. current
4. Carbon dioxide, because of its excellent penetration and high speed
Combustible electrode and argon in combination with d.c.current
1. molecular attraction
2. surface tension and attraction
3. gravitational force
4. both (a) and(b)
both (a) and(b)