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20 volts Acetylene Pressure adjacent edges adjusted all-position angle arc length ASSIGNMENT backing strips base metal beveled bronze welding carbon electrode coated electrodes corner welds crater Current in Arc cutting cylinder valve DEPOSITING BEADS downhand Explain your answer filler rod finished welds flat position flux gas pockets hose inspected for appearance Instructions lap joint lap weld melted Mild-steel plates molten metal needle valve neutral flame operator should practice overhead position pipe polarity recommended Polarity Setting porosity Position of Weld position with coated positioned flat procedure proper fusion recommended values SHOP ASSIGNMENT short arc single-pass single-Vee butt joint single-Vee butt weld slag inclusions space straight bead straight polarity string beads surfaces should show tacked assembly tee joint thickness or heavier three passes torch tip trodes Type of Electrode Type of Flame undercut vertical position Voltage in Arc weaving motion welding circuit welding current welding table welding tip