Welding Trivia Questions and Answers

From a blacksmith's fire to a weld tried in space, with a reason for every answer.

See all 88 with answers
The word weld comes from a word in which family of languages?

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Unofficial practice questions, not affiliated with any school, exam board or quiz show. Bank checked October 9, 2026.

How it works

What were welds tested with before X-rays, and which gas gave TIG its first name? These welding trivia questions and answers cover the history, the processes and the shop words. It is a quiz, not a welding lesson.

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Welding trivia questions on how it began

Hammer and fire: before electricity runs from gold boxes of the Bronze Age to an iron pillar in Delhi. The arc and the torch arrive has the first electric arc, acetylene and a wartime gas shortage. Stick, MIG, TIG and the torch asks what the letters mean.

Shop words and big jobs

Spot, beam, friction and the rest asks which weld needs a vacuum and which is likened to dough. Words of the trade suits anyone who has chipped slag: the kerf, peening, the HAZ and the nod. Ships, rails, bridges and rockets has the Fullagar, fish freezers and a weld tried on Soyuz 6.

  • At a shop party, Words of the trade is the round the welders win and everyone else guesses.

Questions and answers

What are some easy welding trivia questions?

What is the everyday name for shielded metal arc welding? What does the T in TIG stand for? What is thermite welding most used to join? The answers are stick welding, tungsten and railway rails.

What is the oldest type of welding?

Forge welding: heating the metal and hammering the pieces together. Until the end of the 19th century it was the only welding process. The earliest known welds are Bronze Age gold boxes, joined by pressure.

Who invented welding?

No one person. Blacksmiths forge welded iron for millennia. Nikolai Benardos and Stanisław Olszewski developed the first electric arc method, with carbon electrodes, in the 1880s, and French engineers developed oxygen-acetylene welding in 1903.

What is the difference between MIG and TIG welding?

MIG, metal inert gas, feeds a continuous wire as its electrode. TIG, tungsten inert gas, uses a tungsten electrode that is not used up, with filler metal added separately. TIG is slower and takes more skill.

How were the answers checked?

On October 9, 2026, in twelve English Wikipedia articles, from Welding to Welding helmet; each question links its own. Three figures the articles give two ways are not asked, among them the temperature of the acetylene flame.

All 88 questions with answers

Hammer and fire: before electricity 18

  • At what color of heat is common steel typically forge welded? Answer: Bright yellow. Source: Wikipedia: Forge welding
  • Before fusion welding, how were steel plates and girders too large to forge weld usually joined? Answer: They were riveted. Source: Wikipedia: Forge welding
  • The earliest known welding dates to which age? Answer: The Bronze Age. Source: Wikipedia: Welding
  • Early iron came out of the bloomery as a lump called sponge iron. Why sponge? Answer: It was full of pores. Source: Wikipedia: Forge welding
  • Forge welding has another common name. What is it? Answer: Fire welding. Source: Wikipedia: Forge welding
  • The Greek historian Herodotus credits whom with discovering iron welding? Answer: Glaucus of Chios. Source: Wikipedia: Welding
  • How did Greek and Roman founders join the separately cast pieces of a large bronze statue? Answer: They poured molten bronze into the joints. Source: Wikipedia: Welding
  • How were the pieces of the ancient Iron pillar of Delhi joined? Answer: By forge welding. Source: Wikipedia: Forge welding
  • In many languages the words for welding are related to words for what? Answer: Boiling or bubbling. Source: Wikipedia: Welding
  • In which year was the word weld first recorded in English? Answer: 1590. Source: Wikipedia: Welding
  • The iron dagger found with Tutankhamun was forged from what? Answer: Meteoric iron. Source: Wikipedia: Welding
  • Pattern welding, which first appeared around 700 BC, joined which two materials? Answer: High-carbon and low-carbon steel. Source: Wikipedia: Forge welding
  • Until the end of the 19th century, what was the only welding process? Answer: Forge welding. Source: Wikipedia: Welding
  • What was the oldest flux used in forge welding? Answer: Fine silica sand. Source: Wikipedia: Forge welding
  • Where did forge welding most likely begin, around 1800 BC, when people learned to smelt iron? Answer: Anatolia. Source: Wikipedia: Forge welding
  • Which book of 1540, by Vannoccio Biringuccio, describes the forging operation? Answer: De la pirotechnia. Source: Wikipedia: Welding
  • Which metal, used in the earliest known welds, is soft enough to be pressure welded with little or no heat? Answer: Gold. Source: Wikipedia: Welding
  • The word weld comes from a word in which family of languages? Answer: Scandinavian. Source: Wikipedia: Welding

The arc and the torch arrive 15

  • An early name for TIG welding was Heliarc. Why? Answer: It used helium as the shielding gas. Source: Wikipedia: Gas tungsten arc welding
  • Around 1900, what did Arthur Strohmenger coat his welding electrodes with to steady the arc? Answer: Clay and lime. Source: Wikipedia: Shielded metal arc welding
  • Automatic welding arrived in 1920. What made it automatic? Answer: The electrode wire was fed continuously. Source: Wikipedia: Welding
  • Before X-ray tests, how were welds first checked for soundness? Answer: With a hammer and a stethoscope. Source: Wikipedia: Welding
  • During World War II, submerged arc welding could make certain welds how much faster than earlier techniques? Answer: Twenty times faster. Source: Wikipedia: Welding
  • Engineers of which country were the first to develop oxygen-acetylene welding, in 1903? Answer: France. Source: Wikipedia: Oxy–fuel welding and cutting
  • The first electric arc welding method used electrodes made of what? Answer: Carbon. Source: Wikipedia: Welding
  • From 1953, carbon dioxide as the shielding gas made it more economical to MIG weld which metal? Answer: Steel. Source: Wikipedia: Gas metal arc welding
  • Hans Goldschmidt developed which kind of welding in the mid-1890s? Answer: Thermite welding. Source: Wikipedia: Exothermic welding
  • In 1881 Auguste de Méritens used an electric arc to join the plates of what? Answer: A lead-acid battery. Source: Wikipedia: Welding
  • Which Soviet metallurgist invented underwater welding in 1932? Answer: Konstantin Khrenov. Source: Wikipedia: Hyperbaric welding
  • Who discovered acetylene, the gas of the welding torch, in 1836? Answer: Edmund Davy. Source: Wikipedia: Welding
  • Who discovered the short-pulse electric arc, the spark that arc welding grew from, at the start of the 1800s? Answer: Humphry Davy. Source: Wikipedia: Welding
  • Who received the first patents for resistance welding, in 1885? Answer: Elihu Thomson. Source: Wikipedia: Welding
  • Why did the British rely mainly on arc welding during World War I? Answer: There was a shortage of gas. Source: Wikipedia: Welding

Stick, MIG, TIG and the torch 8

  • Acetylene cylinders are packed with a porous material and partly filled with which liquid, in which the gas dissolves? Answer: Acetone. Source: Wikipedia: Oxy–fuel welding and cutting
  • How many separate supplies does an oxy-fuel torch need? Answer: Two: fuel and oxygen. Source: Wikipedia: Oxy–fuel welding and cutting
  • In submerged arc welding, what is the arc submerged beneath? Answer: A layer of flux. Source: Wikipedia: Welding
  • Shielded metal arc welding has a short everyday nickname. What is it? Answer: Stick welding. Source: Wikipedia: Shielded metal arc welding
  • What do the letters MIG stand for in MIG welding? Answer: Metal inert gas. Source: Wikipedia: Gas metal arc welding
  • What does the T stand for in TIG welding? Answer: Tungsten. Source: Wikipedia: Gas tungsten arc welding
  • Which two gases are named as the shield for a TIG weld? Answer: Argon and helium. Source: Wikipedia: Gas tungsten arc welding
  • Why is MIG welding hard to do well outdoors? Answer: Drafts blow the shielding gas away. Source: Wikipedia: Gas metal arc welding

Spot, beam, friction and the rest 14

  • About how long does the current flow to make one spot weld? Answer: A fraction of a second. Source: Wikipedia: Spot welding
  • Electron beam welding has to be done in what? Answer: A vacuum. Source: Wikipedia: Welding
  • Explosion welding is commonly used to join what? Answer: Unlike metals, such as aluminum to steel. Source: Wikipedia: Welding
  • Friction stir welding joins metal without melting it. To what is the mixing compared? Answer: Joining clay or dough. Source: Wikipedia: Friction stir welding
  • In robot welding, which process was at first the most common application? Answer: Spot welding. Source: Wikipedia: Welding
  • In the thermite reaction, what floats on top of the molten iron? Answer: A slag of aluminum oxide. Source: Wikipedia: Exothermic welding
  • In which clinic are small spot welders used to resize metal molar bands? Answer: An orthodontist's. Source: Wikipedia: Spot welding
  • Resistance welding presses metal sheets between two electrodes. What are the electrodes usually made of? Answer: Copper. Source: Wikipedia: Welding
  • Seam welding uses electrodes of which shape to make long continuous welds? Answer: Wheels. Source: Wikipedia: Welding
  • Solvent welding softens the surfaces with a chemical in place of heat. What is it commonly used to join? Answer: PVC or ABS pipes in plumbing. Source: Wikipedia: Welding
  • Thermite welding gets its heat from a reaction between a metal oxide and a powder of which metal? Answer: Aluminum. Source: Wikipedia: Exothermic welding
  • Ultrasonic welding joins thin sheets or wires using pressure and what? Answer: High-frequency vibration. Source: Wikipedia: Welding
  • Underwater welding can be done wet, in the water itself. What is the other way? Answer: Dry, in a pressurized enclosure around the work. Source: Wikipedia: Hyperbaric welding
  • Welding a thermoplastic with heat is very similar to welding which other material? Answer: Glass. Source: Wikipedia: Welding

Words of the trade 18

  • A weld made inside a hole in the top piece of metal, joining it to the piece beneath, is called what? Answer: A plug weld. Source: Wikipedia: Welding
  • A welding machine is set to DCEP. What do the letters EP stand for? Answer: Electrode positive. Source: Wikipedia: Welding
  • The base metal in a weld has another name. What is it? Answer: Parent metal. Source: Wikipedia: Welding
  • Before auto-darkening helmets, how did a welder lower the helmet over the face just before striking the arc? Answer: With a nod of the head. Source: Wikipedia: Welding helmet
  • The d at the end of weld was added for no reason of word history. What is such a consonant called? Answer: Excrescent. Source: Wikipedia: Welding
  • How do brazing and soldering differ from welding? Answer: They do not melt the base metal. Source: Wikipedia: Welding
  • How many basic types of weld joint are there? Answer: Five. Source: Wikipedia: Welding
  • In direct current welding, about how much of the arc's heat gathers at its positive end? Answer: 70 percent. Source: Wikipedia: Welding
  • In oxy-fuel cutting, what is the slot made by the cut called? Answer: The kerf. Source: Wikipedia: Oxy–fuel welding and cutting
  • Striking a finished weld to compress its surface is called what? Answer: Peening. Source: Wikipedia: Welding
  • Welders list porosity among the defects of a weld. What is it? Answer: Gas trapped in the weld. Source: Wikipedia: Welding
  • What do welders call the residue from the flux that must be chipped off a finished stick weld? Answer: Slag. Source: Wikipedia: Welding
  • What is a metal called when it can bend before it cracks? Answer: Ductile. Source: Wikipedia: Welding
  • What is an autogenous weld? Answer: A weld made with no filler metal. Source: Wikipedia: Gas tungsten arc welding
  • What is the fusion zone? Answer: The weld itself, where the filler metal was laid. Source: Wikipedia: Welding
  • What is the HAZ around a weld? Answer: The heat-affected zone. Source: Wikipedia: Welding
  • What is the pool of molten metal at a weld called? Answer: The weld pool, or puddle. Source: Wikipedia: Welding
  • Which basic weld joint has the cruciform joint as a variant? Answer: The T-joint. Source: Wikipedia: Welding

Ships, rails, bridges and rockets 15

  • The all-welded merchant vessel Carolinian, launched in 1930, needed no rivets. About how many pounds of steel rivets did that save? Answer: 77,000 pounds. Source: Wikipedia: Welding
  • Besides ships and pipelines, what is underwater welding often used to repair? Answer: Offshore oil platforms. Source: Wikipedia: Hyperbaric welding
  • The first commercial use of friction stir welding, in 1996, was to make panels for what? Answer: Fish freezers. Source: Wikipedia: Friction stir welding
  • The first thermite-welded track in the United States was laid in 1904 for a street railway in which Massachusetts city? Answer: Holyoke. Source: Wikipedia: Exothermic welding
  • The first welded road bridge in the world, of 1928, is in which country? Answer: Poland. Source: Wikipedia: Welding
  • Friction stir welding was used on which part of the Space Shuttle? Answer: The external tank. Source: Wikipedia: Friction stir welding
  • In which German city was the first rail line welded with thermite, in 1899? Answer: Essen. Source: Wikipedia: Exothermic welding
  • In which industry is spot welding used almost universally, to join sheet metal into the finished product? Answer: Automobile manufacturing. Source: Wikipedia: Spot welding
  • The strength of welded steel made possible a new type of ship that carries which cargo in spherical tanks? Answer: Liquefied natural gas. Source: Wikipedia: Welding
  • Thin straps of which metal are spot welded to battery cells to join them into a battery? Answer: Nickel. Source: Wikipedia: Spot welding
  • Welding was first attempted in space in 1969. On which mission? Answer: Soyuz 6. Source: Wikipedia: Welding
  • What is the most common diving method for underwater welders? Answer: Air supplied from the surface. Source: Wikipedia: Hyperbaric welding
  • What is thermite welding most widely used to join? Answer: Railway rails. Source: Wikipedia: Exothermic welding
  • What was new about the merchant ship Fullagar, which a British shipyard began building in 1919? Answer: Her hull was entirely welded. Source: Wikipedia: Arc welding
  • Why can underwater welding be the cheapest way to mend a ship or a sea structure? Answer: The structure can stay in the water. Source: Wikipedia: Hyperbaric welding