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Welding Metallurgy
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Match the welding process in Group 1 with the source of heat in Group 2.
Group 1 Group 2
P. Ultrasonic welding 1. Thermochemical
Q. Spot welding 2. Electrical resistance
R. SMAW 3. Friction
S. Thermit welding 4. Electric arc

Answer & Solution
Correct Answer: Option D
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