MIG welding test Questions and Answers 100% Solved correctly

List two advantages and two disadvantages of GMAW (MIG) welding. - ️️Advantages: higher production rate, faster welding speed Disadvantages: less portable, requires more operator skills and techniques for welding and equipment setup Which diameters of wire sizes are most commonly used in short circuit metal transfer when MIG circuit metal transfer when MIG welding? - ️️0.023, 0.030, 0.035, 0.045 What power source is required to perform GMAW (MIG) welding? - ️️DC constant potential - voltage What types of metal transfer are possible with GMAW (MIG) process when welding? - ️️Short circuit, Globular, and Spray Transfer What is the main function of the contact tip in a MIG welding gun? - ️️Relay welding currents from the power source to the filler metal (guide the filler metal to work piece) What current and polarity is most commonly used when GMAW wedling? - ️️DC - direct current reverse polarity What type of current is not used when GMAW welding? - ️️Alternating Current (AC) What does the term MIG stand for? - ️️Metal Inert Gas What does the term GMAW stand for? - ️️Gas Metal Arc Welding What is the purpose of a shielding gas when GMAW? - ️️1) To prevent contamination of the weld metal 2) To influence the welding arc and effects the width and depth of weld penetration and amount of spatter On a GMAW welding setup what causes the amperage to increase or decrease? - ️️The dial on the wire feed mechanism. High amperage, more wire. Low amperage, less wire speed. The constant potential welding machine has a voltage range of _____ to _____ volts? - ️️15-48 VTo perform short circuit metal transfer when GMAW welding a voltage range of what required? - ️️15-22 V What type of metal transfer when GMAW welding requires higher current voltages? - ️️Spray transfer