NOCTI Study Guide, Welding Industry Terminology Question And Answers;
Welding - answerUses extreme heat to join or fuse pieces of metal together.
Pressure Welding - The metal is heated to a softened state by electrodes. Pressure
is applied and the metal is joined.
Fusion Welding - answerPieces of metal are heated to the melting point, joined
together, and allowed to cool.
Weld Root - answerThe part of the joint where the wire electrode is directed.
Weld Face - answerThe exposed surface of the weld on the side that has been welded.
Weld Penetration - answerIndicated by the height of the exposed surface of the weld
on the back side. Full weld penetration is needed to assure maximum weld strength.
Burn Mark - answerAn indication of good weld penetration.
Burn-Through - answerResults from penetrating too much into the lower base metal,
which burns a hole through the back side of the metal.
Weld Legs - answerThe width and height of the weld bead.
Weld Throat - answerRefers to the depth of the triangular cross section of the
weld.
Joint Fit-Up - answerRefers to holding work pieces tightly together, in alignment
to prepare for welding.
Metal Inert Gas Welding (MIG) - answerOffers more advantages than other methods for
welding high-strength steels and high-strength, low alloy steel component parts
used in modern cars.
Tungsten Inert Gas (TIG) - answerUses a handheld rod and gas-shielded arc, is often
recommended when welding aluminum alloy body panels
Heat Effect Zone - answerThe area around the weld that becomes adversely hot.
Welding Blankets - answerThick covers made of fire-resistant cloth for protecting
vehicle surfaces from heat, sparks, and weld splatter.
Electronic Shielding - answerNeeded when welding near on-board computers and sensor
wiring.
DC Reverse Polarity - answerMeans the wire (electrode) is positive and the
workpiece is negative.
Welding Filter Lens - answerSometimes called a filter plate, a shaded glass welding
helmet insert for protecting your eyes from ultraviolet burns.
Welding Current - answerAffects the base metal penetration depth, the speed at
which the wire is melted, arc stability, and the amount of weld splatter.
Undercutting - answerProducing a weld surface level lower than base metal.
Flat Welding - answerMeans the pieces are parallel with the bench or shop floor.
Horizontal Welding - answerHas the pieces turned sideways.
, Vertical Welding - answerHas the pieces turned upright.
Overhead Welding - answerHas the workpieces turned upside down and the welder is
looking up at the workpiece.
Tack Weld - answerA tack, relatively small, temporary MIG spot weld that is used
instead of a clamp or sheet metal screw to tack and hold the fit in place while
proceeding to make a permanent weld.
Continous Weld - answerAn uninterrupted seam or bead is laid down in a slow,
steady, ongoing movement.
Plug Weld - answerMade in a drilled or punched hole through the outside piece (or
pieces).
Spot Weld - answerIn an MIG spot weld, the arc is directed to penetrate both pieces
of metal, while triggering a timed impulse of wire feed.
Lap Weld - answerIn the MIG lap spot technique, the arc is directed to penetrate
the bottom piece and the puddle is allowed to flow into the edge of the top piece.
Stitch Weld - answerA series of connecting or overlapping MIG spot welds, creating
a continuous seam.
Insert - answerBacking strip, made of the same metal as the base metal can be
placed behind the weld.
Aluminum Electrode Wire - answerClassified by series, according to the metal or
metals the alluminum is alloyed with and whether the alluminum is heat treated.
Destructive Test - answerA test piece of the same metal as the welded piece and
with the same panel thickness.
Nondestructive Test - answerTo confirm a spot weld after it has been made, use a
chisel and hammer and proceed.
Neutral Flame - answerThe standard flame is said to be a neutral flame.
Carburizing Flame - answerAlso called a surplus or reduction flame, is obtained by
mixing slightly more acetylene than oxygen.
Oxidizing Flame - answerObtained by mixing slightly more oxygen than acetylene.
Heat Crayons - answerAlso called thermal paint, can be used to determine the
temperature of the alluminum or other metal being heated.
Brazing - answerApplied only to places for sealing.
Plasma Arc Cutting - answerCreates an intensely hot air stream, which melts and
removes metal over a very small area.
Active Arc Stabilizer - answerEnhances arc starts and provides a softer arc
throughout all ranges, with less puddle turbulence and less spatter.
Adaptive Hot Start - answerAutomatically increases the output amperage at the start
of a stick weld, should the start require it. Helps eliminate sticking of the
electrode at arc start.
Air Carbon Arc Cutting (CAC-A) - answerA cutting process by which metals are melted
Welding - answerUses extreme heat to join or fuse pieces of metal together.
Pressure Welding - The metal is heated to a softened state by electrodes. Pressure
is applied and the metal is joined.
Fusion Welding - answerPieces of metal are heated to the melting point, joined
together, and allowed to cool.
Weld Root - answerThe part of the joint where the wire electrode is directed.
Weld Face - answerThe exposed surface of the weld on the side that has been welded.
Weld Penetration - answerIndicated by the height of the exposed surface of the weld
on the back side. Full weld penetration is needed to assure maximum weld strength.
Burn Mark - answerAn indication of good weld penetration.
Burn-Through - answerResults from penetrating too much into the lower base metal,
which burns a hole through the back side of the metal.
Weld Legs - answerThe width and height of the weld bead.
Weld Throat - answerRefers to the depth of the triangular cross section of the
weld.
Joint Fit-Up - answerRefers to holding work pieces tightly together, in alignment
to prepare for welding.
Metal Inert Gas Welding (MIG) - answerOffers more advantages than other methods for
welding high-strength steels and high-strength, low alloy steel component parts
used in modern cars.
Tungsten Inert Gas (TIG) - answerUses a handheld rod and gas-shielded arc, is often
recommended when welding aluminum alloy body panels
Heat Effect Zone - answerThe area around the weld that becomes adversely hot.
Welding Blankets - answerThick covers made of fire-resistant cloth for protecting
vehicle surfaces from heat, sparks, and weld splatter.
Electronic Shielding - answerNeeded when welding near on-board computers and sensor
wiring.
DC Reverse Polarity - answerMeans the wire (electrode) is positive and the
workpiece is negative.
Welding Filter Lens - answerSometimes called a filter plate, a shaded glass welding
helmet insert for protecting your eyes from ultraviolet burns.
Welding Current - answerAffects the base metal penetration depth, the speed at
which the wire is melted, arc stability, and the amount of weld splatter.
Undercutting - answerProducing a weld surface level lower than base metal.
Flat Welding - answerMeans the pieces are parallel with the bench or shop floor.
Horizontal Welding - answerHas the pieces turned sideways.
, Vertical Welding - answerHas the pieces turned upright.
Overhead Welding - answerHas the workpieces turned upside down and the welder is
looking up at the workpiece.
Tack Weld - answerA tack, relatively small, temporary MIG spot weld that is used
instead of a clamp or sheet metal screw to tack and hold the fit in place while
proceeding to make a permanent weld.
Continous Weld - answerAn uninterrupted seam or bead is laid down in a slow,
steady, ongoing movement.
Plug Weld - answerMade in a drilled or punched hole through the outside piece (or
pieces).
Spot Weld - answerIn an MIG spot weld, the arc is directed to penetrate both pieces
of metal, while triggering a timed impulse of wire feed.
Lap Weld - answerIn the MIG lap spot technique, the arc is directed to penetrate
the bottom piece and the puddle is allowed to flow into the edge of the top piece.
Stitch Weld - answerA series of connecting or overlapping MIG spot welds, creating
a continuous seam.
Insert - answerBacking strip, made of the same metal as the base metal can be
placed behind the weld.
Aluminum Electrode Wire - answerClassified by series, according to the metal or
metals the alluminum is alloyed with and whether the alluminum is heat treated.
Destructive Test - answerA test piece of the same metal as the welded piece and
with the same panel thickness.
Nondestructive Test - answerTo confirm a spot weld after it has been made, use a
chisel and hammer and proceed.
Neutral Flame - answerThe standard flame is said to be a neutral flame.
Carburizing Flame - answerAlso called a surplus or reduction flame, is obtained by
mixing slightly more acetylene than oxygen.
Oxidizing Flame - answerObtained by mixing slightly more oxygen than acetylene.
Heat Crayons - answerAlso called thermal paint, can be used to determine the
temperature of the alluminum or other metal being heated.
Brazing - answerApplied only to places for sealing.
Plasma Arc Cutting - answerCreates an intensely hot air stream, which melts and
removes metal over a very small area.
Active Arc Stabilizer - answerEnhances arc starts and provides a softer arc
throughout all ranges, with less puddle turbulence and less spatter.
Adaptive Hot Start - answerAutomatically increases the output amperage at the start
of a stick weld, should the start require it. Helps eliminate sticking of the
electrode at arc start.
Air Carbon Arc Cutting (CAC-A) - answerA cutting process by which metals are melted
