Welding level 2 final exam questions and answers(verified for accuracy)

increase If the wire speed is increased during GMAW or FCAW work, the voltage must __________________________. tungsten In GTAW, the torch holds a (an) __________________ electrode. 120 When tapering the point on a tungsten electrode, use ______-grit grinding wheels or sanding belts for finishing. the wire to fuse to the tip If the welding voltage is set too high, the arc will be too long and could cause __________________________________________________________. purge the gun as directed When setting up a welding machine for GMAW or FCAW work, you should turn on the machine and ___________________________________. 1/2 inch When a high-voltage, high-frequency current is used in GTAW work, it creates an arch that can jump a gap of about __________. lower than In GTAW, after the arc has been struck, the arc voltage is ____________ the open-circuit voltage. silicon The aluminum alloy filler metal rod ER4043, widely used in GTAW, also contains ______________________. non-reflective The wall surrounding the area in which GTAW work is being performed should be painted with paint that is _________________. large nozzles Higher shielding gas flow rates are required with _______________. base metal Direct current electrode negative (DCEN) produces the greatest amount of heat in the _________________________________. 60 to 100 Most heavy-duty industrial machines used for manual welding have a _______________________ percent duty cycle. arc starting One of the advanced features associated with the GTAW process is the high-frequency intensity controls that provide better __________________________________. Oxygen In the atmosphere near the weld, the UV radiation from the GTAW process can ionize ______________________. GTAW If you see the label TIG on a welding machine , that machine is considered to be what kind of a welding machine? Oxygen When welding, the gas that should never be released in a large amount as compressed air around flammable materials is ______. Direct current electrode negative (DCEN) GTAW is almost always performed using ____________________________. Pure Of the various types of tungsten electrode available, the tungsten electrodes that are used for AC welding are ____________. Argon When welding with GTAW in a cross draft situation, better shielding is provided by ________________________. GTAW Which welding process is recommended for the repair of a defect on clean magnesium castings? Truth When setting up GTAW equipment, the shielding gas supply must be located reasonably close to the welding site because of the limited length of GTAW torch cables? T or F Stainless Steel In GTAW, small amounts of hydrogen are sometimes mixed with argon for deeper penetration when welding______________. six When a larger (3/32" to 1/8") wire electrode diameter is used, the width of a stringer beads is generally no more then ____ times the wire electrode's diameter. 6,000 F to 10,000 F When GTAW arc is struck across a gap, the resistance generates heat in the range of _________________________________. 9 to 14 When making GTAW welds, wear safety glasses and a welding hood with the correctly tinted lenses that are shaded ___________. ten Compare to helium, argon-shielding gas is _______ times heavier. 36" The filler metal used for manual GTAW is generally supplied in diameters of 1/16" to 1/14" and lengths of _________. 10 The duty cycle of a welding machine is based on a ________ - minute period. 6,000 F to 10,000 F The welding arc generates intense heat that ranges from ________________. governors In engines that powers generators, _______________ control the engine speed. GMAW metal transfer modes Spray transfer, globular transfer, and pulsed transfer are __________________________. CO2 The duty cycle of a GMAW gun is determined and rated with ____________________________-. Zigzag To prevent sagging in out of position V-groove welds with weave beads, which weave pattern should be used? argon Because of its current transfer and ionization properties, the commonly used shielding gas that can be used alone or in combination with other gases is _______. portable The advantage of engine-driven generators is that they are ________________. primary current to welding current The function of the transformer within a transformer-rectifier power source is to ______________________________. consumable wire electrode In gas metal arc welding (GMAW), the electrode that is melted by an electric arc to fuse it to the base metal and from welding, is a _________________________________________________. a rear deflector If a hard hat must be worn while welding, what attachment must also be worn on the hat? self-shielding FCAW (FCAW-S) The welding process that uses flux-cored wire without external shielding gas called _______________________________. pinch effect When using short-circuiting wleding in GMAW, current passing through the wire electrode heats and melts the wire in a process called _________________. 8" or taller How tall must a welder's safety shoes be? shielding gas In GMAW, the arc is stabilized and the molten filler and base metals protected from oxidation by _____________________. oxygen When working near oil, grease, and other petroleum products, keep large amounts of _____________ away from them. external wire feeder The device that pulls the electrode wire from a spool and pushes it through the gun cable and gun is known as ________________. 2 to 3 Depending on the range selected, for each 100 amperes of current, the arc voltage of a welding machine is typically lower then the open-circuit voltage by ______________ volts. Atmpsphere To prevent contamination of the weld puddle, shielding gases are used to displace what from the weld zone? produce its rated amperage without overheating A duty cycle is the percentage of a 10-minute period during which a welding machine can continuously _____________________. clamping pliers When handling hot metal, welders should use ___________________. shielding gas flow Light-duty GMAW guns are cooled by ____________________________. critical use Filler wire that is used on aircraft, nuclear reactors, and pressure vessels is graded as ____________________________. gas regulator/flow-meter To meter the shielding gas to the welding gun at the proper flow rate, a(an) _____________________________________. Install handles on their tangs To prevent personal injury, what should be done to files? copper strands covered with layers of rubber reinforced by nylon or dacron cord A welding cable consists of _______________________________________________. increasing the frequency of the incoming primary power source Inverter power sources provide more controls for welding by _____________________________________. 45 For the first bead in a fillet weld, the work angle is ____ degrees to both plate surface. smaller With lower welding amperage and less heat, the GMAW or FCAW weld beads are __________________. stick out The length of the wire that extends beyond the contact tip of the welding gun is the __________________________. less penetration When the wire electrode speed is increased, the result is usually _________________________________. all positions Groove welds can be made in ____________________________. not enough time was spent in the crater If a restart has undercut, ___________________________________.