Final answer:
Without specific details on the welding process and equipment, it is not possible to accurately provide the recommended minimum air pressure for an electrode with a 5/8" (15.9 mm) diameter. For accurate settings, consult the equipment's manual or specifications.
Step-by-step explanation:
The question being asked pertains to the recommended minimum air pressures for an electrode with a 5/8" (15.9 mm) diameter. This type of question typically relates to welding and engineering contexts, where such an electrode is used for welding applications. The minimum air pressure recommended would depend on the welding equipment and conditions, but the provided references suggest topics concerning air pressure and forces applied in various situations. Unfortunately, without specific information related to the welding process, equipment used, and the material of the electrode, it is not possible to provide an accurate minimum air pressure for an electrode of the given diameter. It is recommended to consult the equipment's manual or specifications sheet for the correct air pressure settings.