Welding Questions and Answers 100% Pass

Welding Questions and Answers 100% Pass ______________welding joins metals by blending compatiable molten metals into one common part or joint. Fusion _________or nonfusion joining occurs when two or more pieces of steel are held together by a noncompatiable molten brass or silver material Adhesive The three basic types of fusion welding are? Gas Electric Ark Electrical Resistance Gas welding utilizes what two gases? Oxygen and Acetylene The Temperature of a neutral oxyacety flame is about__________to___________degrees fahrenheit Electric welding produces a blinding light with__________and___________rays which can_________both skin and eyes infrared ultravilot burn Anyone performing electric arc welding must wear? Arc welding helmet gloves proper clothing Shielded metal arc welding (SMAW) is more commonly known as____________welding Stick MIG Welding may also be known as_________ _______ arc welding gas metal An uncoated wire is fed into the torch as a consumable electrode in _________(TIG OR MIG) MIG The form of arc welding that fills most of the needs in aircraft maintenance is know as_________ __________ _____ arc welding. This is commonly referred to by what three letter designation? Tungston Inert Gas TIG A small wire of ____________is used as the noncomsumable elecrtrode for TIG welding. Tungkston In a TIG welder, the electric arc produces a temperture of up to______________degrees 11,000 When using a direct current for TIG welding, the most heat is put into the work when the DC is connected with________(straight or reverse) polarity Straight Two forms of electrical resistance welding are? Spot and Seam What three variables are ocntrolled to get the proper weld using wither of the two electrical resistance welding methods? Current Pressure Dwell time The five basic types of weld joints are? Butt Tee Lap Corner Edge A cleanly formed oxyacetylene weld should encompass the following qualities? Uniform Width Good Penetration Adequate reinforcement Uniform ripples Penetration of welded aircraft parts shold be at a depth of ____________% of the thickness of the base metal 100 In brazing, the filler metel is pulled between closely fitting parts by____________action Capillary When brazing, the filler rod should be melted by A. Holding the rod in the Flame of the torch B. Touching the rod to the hot metal B. Touching the rod to the hot metal Soft solder is a mixture of_________and________ Tin and Lead Fittings may be attached to stainless steel oxygen lines by____________soldering Silver Aluminum__________(does or does not) change in color as it melts. Does NOT Which gas is better to torch welding aluminum, acetylene or hydrogen? Hydrogen The main advantage to oxyhydrogen welding is that the hydrogen flame burns___________(cleaner or hotter) than acetylene Cleaner The flame used for welding aluminum should be neutral or slightly_______________(carburizing or oxidizing). Carburizing An________ ____ shields the puddle of molten metal to prevent the formation of oxides when TIG welding Inert gas Tutanium must be welded in an atmosphere that prevents any _________or ___________ from contacting the hot metal Oxygen or nitrogen Exhaust stacks from an aircraft engine should be TIG welded using ___________(DC or AC) DC A dented structual tube may be repaored with a welded patch to provided the dent is no deeper than _______the tube diameter and doesn't involve more than________ of the tube circumference 1/10 1/4 The rosette weld is a form of __________(lap or butt) weld LAP The ends of a reinforcing tube used over a damaged tube in an aircraft structure can be cut with eithier a 30 degree___________ or a ___________ Scarf Fishmouth Use of __________ parts on a landing gear assembly makes welding repairs _________or _______________ Heat treated difficult or impossible Acetylene gas stored under pressure of more than ________PSI will become unstable 15 Normal operating pressure for most welding jobs using acetylene is _____to_____psi 4 to 8 Acetylene gas may be stored under pressure by combining it with_______ Acetone The amount of actylene gas in a steel cylinder is determined by_______(weight or pressure) of the cylinder. Weight The acetylene tank valve shold be opened no more than _______to_______turns 1/4 to 1/2 Oxygen must never be used in the presence of___________based substances Petroleum Tanks previously filled with __________, __________ or ____________fluid must be ________ _________ before beginning any welding operations gasoline, alcohol or hydralic Steam Cleaned Turning the acetylene regulator adjusting handle clockwise will________(open or close)the valve CLOSE The acetylene hose is colored_________and has a _______(left or right) hand threaded fitting at each end RED LEFT The torch most often used with cylinder gases is an ____________ (equal pressure or injector) type Equal Pressure A torch designed for light duty welding such as one used with aircraft thin wall tubing, has it valve on the end of the torch near the ____(tip or hoses) Tip The lower the number of the welding tip (not the size of the orifice), the__________(smaller or larger) the tip Smaller The size of the orifice in a welding tip is measured with the shank of a___________ Number Drill Torches should be lit with a______not with_________or ___________ Striker Matches or lighter Most mild steel filler rods are coated with__________to prevent rust from forming on the surface of the rod Copper Oxyacetylene welding goggles___________(will or will not) provide adequate eye protection for electric arc welding Will NOT The lower the number of welding goggles filter, the _________(lighter or darker) the filter lighter A__________(blue or brown) filter should be used in the welding goggles for welding aluminum, Blue The ______________of the metal to be welded will determine the size of the torch tip needed thickness An oxyacetylene flame in which the feather of the outer cone just diappears into the inner cone is a _____________(neutral or oxidizing) Flame Neutral When a oxyacetylene welding torch is shut off, the ___________(oxygen or acetylene) is shut off first Acetylene The union nut for connecting the oxygen regulator to the cylinder valve has _________(right or left) hadn threads Right The fittings on the ___________(oxygen or acetylene) hose are identified by a goove cut around their hex nuts fittings, Acetylene The oxygen hose is colored______and has a _______(left or right) hand threaded fitting at each end Green and Right The preheat flame in an oxyacetylene cutting torch should be adjusted to a___________(neutral or oxidizing) flame Neutral