Welding - Processes (SMAW, GTAW, GMAW, FCAW, SAW,)

A: A aligns with why inspectors care about O₂ ppm at the root; oxides act like built‑in defects. B sounds metallurgical, but hydrogen control is driven by consumables and moisture, not oxygen content. C borrows logic from plasma processes, yet GTAW arc stability isn’t governed by purge composition. D mixes up dilution control with joint geometry, not the purge environment.

A: A survives the unit traps: volts times amps, times 60, divided by speed, then efficiency applied once. B skips efficiency, a common shortcut during shop PQRs. C feels neat but quietly swaps minutes for seconds without noticing. D is what happens when time conversion gets layered during a rushed check.

A: A is dull but defensible; conflicting controls mean you don’t know what process is running. B relies on operator feel, which auditors won’t accept. C actively changes an essential variable mid‑production. D sounds procedural, yet letting work proceed without alignment is exactly what inspectors probe.

A: A reflects the code’s trust in repeatability and inspection history. B overstates flux capability; contamination can still occur. C reverses reality, since SAW often runs hot. D ignores setup, parameters, and flux handling, all of which still depend on people.

A: A sticks to what deposition rate actually means. B confuses total mass with a rate. C double‑counts efficiency losses that belong elsewhere in planning. D mixes material loss with time, which skews both metrics.

A: A addresses uncertainty before quality is affected. B feels pragmatic but hides a real fault. C assumes location equals accuracy, which isn’t guaranteed. D risks turbulence and oxidation while masking the root cause.

A: A ties directly to flux chemistry and fume generation. B mixes hazards; UV isn’t the main driver. C is a different HSE domain altogether. D confuses common practice with a defining condition.

A: A respects both the maths and the process efficiency. B sounds process‑specific but drops a required factor. C treats efficiency like a substitute, not a multiplier. D mangles units in a way that inflates results fast.

A: A matches the fatigue and fracture concern driving rejection. B exaggerates failure mode certainty. C guesses at cause rather than consequence. D generalises a local defect into a bulk material issue.