Final answer:
The correct answer is option 1, which involves considering the base metal composition, welding position, and the electrode's current capabilities when selecting a welding electrode.
Step-by-step explanation:
The correct answer is option 1), which includes the characteristics of composition of the base metal, welding position, and electrode's current capabilities. These factors are critical for ensuring a good quality weld. The composition of the base metal must be compatible with the electrode to prevent weld defects. The welding position affects the type of electrode used because some electrodes are designed for flat, vertical, or overhead welding, and they ensure the stability of the arc. Finally, the electrode's current capabilities must match the power source to provide adequate penetration and fusion of the metal.
When selecting the correct electrode for welding, it is important to consider the composition of the base metal as different metals require different types of electrodes. The welding position is also a crucial factor to consider, as different positions may require different types of electrodes to ensure proper fusion. Lastly, the electrode's current capabilities need to be taken into account to ensure that it can handle the required current for the welding process.