Metal Joining and Cutting Process Questions with Correct Answers benefits to knowledge on metal joining and cutting process` - Correct Answer Helps spot problems , better inspection, gains cooperation, and respect.The three basic processes - Correct Answer Welding, brazing, and cutting brazing - Correct Answer A process using heat in excess of 800°F , does not melt base metal.welding - Correct Answer Fusing two pieces of material using a heat process; most commonly used with metal and plastics.Fusion that melts base metal.Common features of welding process - Correct Answer -source of energy -source of shielding
- optional filler metal
- work/electrode 50/50
what is shielding - Correct Answer shields the weld from outside sources , it is the molten state SMAW - Correct Answer Shielding Metal Arc Welding Polarity - Correct Answer the type of current cc is... - Correct Answer constant current - stick and tig CV - Correct Answer Constant Voltage - Mig AC - Correct Answer Alternating positive to negative
DCEP - Correct Answer direct current electrode positive ( reverse polarity) 1 / 2
work/electrode 30/70 better for stick DCEN - Correct Answer direct current electrode negative (straight polarity) work/electrode 70/30 electrode coatings - Correct Answer shields arc stability protects and helps weld cool down and insulates deoxidizes, cleans impurities on surface Alloys (ground up metal and mixes right in) SMAW Electrode - Correct Answer Electrode used in the SMAW process for example E-6010. E meaning it is an electrode, 60 means it has a tensile strength of 60,000 PSI, 1 indicates welding in all positions, 0 indicates the coating to be cellulose sodium and the welding current is DCEP or direct current electrode positive smaw electrode identification - Correct Answer E _ _ _ _ electrode tensile strength position coating/operating characteristics Position meanings - Correct Answer 1- all positions 2- flat amd horizontal fillet only 4- downhill progression only no 3 Classification - Correct Answer F1- Fast Fill F2- Fast Follow F3- Fast Freeze F4- Low hydrogen - limestone base
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