What does STRSW stand for?

• A. Solder Type Resistance Spot Welding
• B. Squeeze-Type Resistance Spot Welding
• C. Shielded Thermal Resistance Solid Welding
• D. Steel Thermal Resistance Welding

Answer: (B)

STRSW stands for Squeeze-Type Resistance Spot Welding. In this method, two metal sheets are clamped together by electrodes and an electrical current is passed through the contact area. The resistance heating at the interface melts just enough metal to form a weld at a small spot. The term “squeeze” refers to the clamping force, “type” flags this category of resistance welding, “resistance” points to the heat generated by electrical resistance, and “spot welding” indicates the welds are discrete points rather than a continuous seam. This technique is common in collision repair for joining body panels with strong, localized welds and minimal distortion.

The other options don’t fit STRSW: solder-type would imply using filler metal and a soldering process; shielded thermal resistance solid welding describes a different mode with shielding and a solid weld not characterized as a spot weld; steel thermal resistance welding is too generic and lacks the explicit “squeeze-type” and “spot” elements that define STRSW.