Welding Practice Test
Free entry-level welding knowledge practice in English, Chinese, and Spanish — safety, welding symbols, thermal cutting, base metals and heat, SMAW, GMAW/FCAW, GTAW, and weld inspection, built on the AWS SENSE Level I written modules.
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Practice questions based on the AWS SENSE Level I (Entry Welder) written modules, ANSI Z49.1 safety practice, and AWS A2.4 welding symbols. This bank covers the KNOWLEDGE half of entry-level welding only — the workmanship and welder performance qualification tests are hands-on and cannot be practised here, and this is not preparation for the separate, performance-based AWS Certified Welder credential. AWS, SENSE, and NCCER are marks of their respective organizations; this site is not affiliated with or endorsed by them. Work from your program's current materials, and follow the welding procedure and drawings on your own job rather than any number you remember.
Welding fundamentals: what the written exams actually ask
Entry-level welding is qualified in two halves. One half is a coupon you cut, fit and weld, which is then examined and sometimes bent until it cracks or doesn't. The other half is a set of written knowledge exams — on safety, on reading a welding symbol, on thermal cutting, on each arc process, and on what a discontinuity is and how it is found. This bank is the written half, in English, Simplified Chinese, and Spanish, built module by module on the national entry-welder program structure. Nothing here asks you to recall a number from a code table, because a welder works from the drawing and the procedure in front of them, not from memory.
How to study the written half
Start with safety, and not because it is the polite thing to say. Safety is examined before you are allowed near the equipment, and it is the module the program holds to the strictest standard of any. It is also the material most likely to be quietly wrong in your head, because welding hazards are not intuitive. The open-circuit voltage of an idle machine is more dangerous than the arc voltage while you are welding, which is the opposite of what most people assume. Arc eye does not hurt at the time; it hurts hours later, which is exactly why people keep earning it. A container that is empty of a flammable liquid is more dangerous than a full one, because it holds vapour in the range that burns. Zinc from galvanized coating and the phosgene formed when an arc meets chlorinated solvent residue are both invisible and both do their damage after the shift. Study this pool for the mechanism, not the rule, and the rule will follow.
Treat welding symbols as a language with a grammar rather than as a set of pictures to recognise. The reference line is the sentence, and position on it carries meaning: below the line is the arrow side, above it is the other side, and that single convention resolves most of the confusion beginners have. Size goes to the left of the symbol and length and pitch go to the right, in that order, always. The tail holds what does not fit anywhere else — a process, a specification, a note. Once you have the grammar, a combined symbol specifying a groove on one side and a fillet on the other stops being intimidating and becomes a sentence with two clauses. The reason to learn it properly rather than by familiarity is that on a real job you will be handed a print you have never seen, by someone who assumes you can read it, and there is no partial credit for welding the wrong side of a joint.
The four arc processes are easiest to hold in your head as answers to one question: where does the shielding come from, and who controls the filler? Stick carries its shielding in the flux covering that burns off the electrode, and the same covering leaves slag you must chip between passes; the welder controls everything, including the arc length, by hand. The wire processes hand the filler feed to a machine running at constant voltage, which self-regulates arc length as your stickout wanders — that is precisely why a continuously fed wire wants a constant-voltage source while a hand-held electrode wants constant current. Gas-shielded wire gets its protection from a bottle, so a breeze ruins it; self-shielded flux-cored wire makes its own, so it goes outside. TIG uses a tungsten that is not consumed and an inert gas, and hands you the filler rod separately, which is why it can weld thin material and clean root passes and why it takes the longest to learn. Almost every process question in this bank is really that question in disguise.
Finally, learn the defects backwards — from the cause to the appearance, not the other way round. A bank of discontinuity questions looks like vocabulary and is actually diagnosis. Porosity means gas got into the puddle, so ask what let it in: moisture, a contaminated surface, a shielding-gas flow that stopped or blew away, an arc so long the shield could not reach. Undercut means the arc melted the base metal at the toe and nothing filled it back, so look at current, travel speed and work angle. Incomplete fusion means the metal was deposited without melting what it landed on, which is a different failure from incomplete penetration, where the root was never reached at all. Hydrogen cracking needs three things together — a susceptible microstructure, hydrogen, and stress — which is why removing any one of them, usually the hydrogen, is the fix. Studied this way, the inspection module stops being a list to memorise and becomes the same skill you use standing over your own bead, deciding what to change on the next pass.
FAQ
Is this the same as being a certified welder?
No, and the difference matters when you are choosing what to study. The entry-welder training program certifies that you completed modules — you pass a written knowledge exam for each one, plus the workmanship or performance test that goes with each welding process you took. Welder certification in the industry sense is something else: it qualifies you against a specific welding procedure, by welding a test coupon that is visually examined and usually bend-tested or radiographed, and it is tied to that procedure and to keeping your hand in. There is no written exam behind it at all. This bank prepares you for the written knowledge side of the training program. It cannot prepare you for a performance qualification, because nobody can practise a bend test on a screen.
Do I need a diploma or experience to start?
The entry-welder program is a training credential, not a degree, and it is built for people starting from nothing — the level is defined as someone who can do routine, predictable, procedural work under close supervision. What it does require is that you train through an accredited program rather than teach yourself, because the workmanship and performance tests have to be administered and recorded by that program. So the practical entry requirement is enrolment, not a prior qualification. Studying the knowledge material ahead of time is still worth doing: the safety exam is taken before any hands-on training begins, and it is the one the program treats most strictly, so it is the first thing worth knowing cold.
Why don't the questions give me preheat temperatures or amperages to memorize?
Because a memorized setting is the wrong habit and, in this trade, a dangerous one. The right preheat depends on the alloy, the thickness, the restraint and the ambient conditions, and it is written into the welding procedure specification for the job. The right amperage depends on the electrode, the position, the joint and the plate. A welder who works from a remembered figure instead of the procedure in front of them is doing the job backwards. So when a question needs a number, the stem supplies it — the procedure calls for this preheat, the drawing calls out this fillet size — and the question turns on what you do with it. What you are expected to know from memory is the direction and the mechanism: what raising voltage does to the bead, why a damp low-hydrogen electrode is a cracking risk, what undercut is telling you about travel speed.
How can you test welding symbols without showing me a picture?
By describing the symbol in words, element by element, and asking what it means. A question will tell you that a fillet symbol sits below the reference line with a size to the left of it, a length and pitch to the right, and a flag at the kink — and then ask which weld that specifies, on which side of the joint, made where. That is harder than matching a picture, and it is a better test, because it forces you to know the convention rather than to recognise a shape you have seen before. It is also closer to the moment that actually matters on the shop floor: someone hands you a print you have never seen, and you have to read it correctly the first time. The same approach runs through the inspection pool, where a discontinuity is described by its appearance, its location and what caused it rather than shown in a photograph.
Which process should I learn first — SMAW, GMAW, FCAW, or GTAW?
For the credential itself the answer is that the choice is yours: the four process modules are optional, and completing the compulsory modules plus at least one process gets you partial completion, while full completion means all four. For learning, the four sort themselves by what they demand. Stick is the least forgiving of arc length and the most forgiving of wind and dirty steel, and it is where slag control and out-of-position work are learned. Wire processes hand the feeding to a machine and let you concentrate on the puddle, with self-shielded flux core being the one that still works outdoors. TIG separates heat from filler completely and is the slowest to become smooth at, which is why it is usually last. This bank keeps them in separate pools so you can work whichever your program is covering now.
What is the difference between a discontinuity and a defect?
A discontinuity is any interruption in the uniform structure of the weld or the base metal — porosity, an inclusion, undercut, a crack. A defect is a discontinuity that the acceptance criteria governing that particular job reject. The distinction is not wordplay: the same small pore can be perfectly acceptable on one weldment and cause rejection on another, because the code, the specification or the contract sets the limit and different jobs are held to different limits. Beginners tend to treat every imperfection as a failure, which is both discouraging and wrong. What an inspector is doing is comparing what is there against a stated criterion. That is why questions in the inspection pool describe what caused a discontinuity and what would correct it, rather than declaring it good or bad in the abstract.