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The most suitable electrode material used for joining low alloy steels using Gas Metal Arc Welding (GMAW) process is

1. copper
2. cadmium
3. low alloy steel
4. tungsten

Correct answer: low alloy steel

Solution

Low alloy steel is the most suitable electrode material for joining low alloy steels in GMAW because it ensures compatibility in composition and properties, leading to strong and reliable welds that maintain the integrity of the base materials.

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