Final answer:
Correct a cold weld with little or no fusion, increasing the amperage (option A) is the appropriate solution. Increasing the voltage, travel speed, or preheat temperature would not address the issue.
Step-by-step explanation:
To correct a cold weld that has little or no fusion, you need to increase the amperage. Increasing the amperage will increase the amount of heat generated during the welding process, allowing for better fusion between the metal surfaces. Higher amperage provides more energy to melt the base metal, creating a stronger and more secure weld.
Increasing the voltage, on the other hand, may not necessarily improve the fusion in a cold weld. Voltage controls the arc length and can affect the penetration depth, but it does not directly address the issue of insufficient fusion in the weld.
Travel speed and preheat temperature are also not the appropriate solutions for a cold weld with little or no fusion. Travel speed refers to the speed at which the welding electrode or torch is moved along the joint, and preheat temperature is the temperature at which the base metal is warmed before welding. While both speed and preheat temperature can impact the quality of a weld, they do not directly address the issue of insufficient fusion in a cold weld.