$$GTAW$$

Resistance spot welding

Friction welding

$$SAW$$

Decreases with increase in gap between the two joining surfaces

Increases with increase in gap between the two joining surfaces

Decreases up to certain gap between the two joining surfaces beyond which it increases

Increases up to certain gap between the two joining surfaces beyond which it decreases

$${3500^0}C$$

$${3200^0}C$$

$${2900^0}C$$

$${2550^0}C$$

GMAW

GTAW

Submerged Arc Welding

None of these