1. immaterial
2. important
3. not effecting the welding
4. none of these
important
1. surface
2. point of contact of electrode and metal
3. point of contact of metals to be welded
4. none of these
point of contact of metals to be welded
1. thermit welding
2. electrical resistance welding
3. oxyacetylence welding
4. all of these.
electrical resistance welding
1. voltage is high and current is low
2. voltage is low and current is high
3. both voltage and current are high
4. both voltage and current are low.
voltage is low and current is high
1. 1 to 5 volts
2. 6 to 10 volts
3. 11 to 15 volts
4. 16 to 20 volts
6 to 10 volts
1. 50 to 100 kgf/cm2
2. 100 to 200 kgf/cm2
3. 250 to 550 kgf/cm2
4. 600 to 900 kgf/cm2
250 to 550 kgf/cm2
1. water
2. air
3. both (a) and (b)
4. none of these
water
1. input supply
2. primary turns of the transformer
3. secondary turns of the transformer
4. all of these
primary turns of the transformer
1. plastic welding
2. fusion welding
3. thermit welding
4. none of these
fusion welding
1. arc welding
2. gas welding
3. thermit welding
4. forge welding
gas welding