GMAW Welding Level 2 Practice Test

These questions are part of the practice quiz. Start practicing

• What indicates proper root fusion when inspecting a groove weld non-destructively?
• Globular transfer is defined as
• How does increasing wire feed speed (WFS) affect heat input and weld penetration in GMAW?
• Moisture in the electrode coating can cause porosity in GMAW.
• DCEN is used for most GMAW applications.
• In aluminum GMAW, which transfer modes are commonly used, and what determines the mode?
• What is a typical preheat temperature range used when welding thick steel sections with GMAW?
• What weld characteristic is primarily determined by wire feed speed?
• What can happen if interpass temperature is too low in a multi-pass weld?
• What effect does shielding gas purity have on weld quality in GMAW?
• Nitrogen entering the weld pool from the atmosphere can cause which issue?
• Which post-weld treatment is commonly specified to restore corrosion resistance in stainless steel after GMAW?
• True or False: A shielding gas of 95% Argon and 5% Oxygen provides higher heat input when welding aluminum between 1 and 2 inches thick.
• How does shielding gas purity relate to porosity in GMAW?
• Which statement about spray transfer conditions is true?
• What is a common cause of porosity in GMAW?
• Which statement about shielding gases for aluminum welding with GMAW is correct?
• How is the fillet weld throat thickness related to the leg size in a 45-degree fillet?
• Which option describes a correct order of passes for a full-penetration groove weld from root to cap?
• What is the purpose of preheating when welding thick steel sections with GMAW?
• Which statement about preheating and hydrogen-induced cracking is least accurate?
• GMAW produces a heavy slag coating that is easily removed.
• In order for spray transfer to occur, CO2 levels cannot exceed what percent?
• For spray transfer welding of nonferrous metals, which shielding gas is required?
• What is the heat input formula for GMAW, and how would you use it to compare two welding setups?
• What is the push vs pull technique in GMAW and how does it affect bead shape and penetration?
• Which device is used to adjust shielding gas flow in MIG welding?
• Beveling edges thicker than 1/4 inch is recommended when using GMAW.
• What happens if CTWD is too short in GMAW?
• Which shielding gas is appropriate for aluminum welding with GMAW?
• What are typical steps for proper weld toe cleanup after GMAW on steel?
• What effect does argon-rich shielding gas have on bead quality in GMAW?
• A drag angle is a travel angle where the electrode wire points away from the direction of travel.
• What is the main purpose of a gas shield in GMAW?
• How does shielding gas flow rate affect weld quality in GMAW?
• Arc stability is defined as what in GMAW?
• What phenomenon occurs when welding in windy conditions and results in inadequate shielding of the weld area?
• Using direct current electrode positive (DCEP) in GMAW tends to produce cleaning action.
• Which shielding gas composition reduces penetration for sheet metal and reduces spatter for autobody work?
• Which practice helps prevent porosity related to arc length and shielding during GMAW?
• Which items constitute the essential PPE for protecting against UV radiation when performing GMAW welding?
• In aluminum GMAW, what shielding gas and transfer mode are commonly used, and what equipment feature helps manage oxide?
• Spray transfer produces high deposition rates with high welding-wire efficiencies.
• What fit-up gap is generally acceptable for a carbon steel butt joint in GMAW, and what issues arise if the gap is too large or too small?
• Starting an arc becomes increasingly difficult as electrode extension increases.
• In ER70S-6, what feature helps reduce porosity in welding plain carbon steel?
• What features should you inspect in a GMAW bead to assess quality?
• Which of the following is a common cause of spatter in GMAW?
• Which statement correctly describes short-circuit transfer and spray transfer in GMAW, and when each is used?
• What is the purpose of a spool gun when welding aluminum with GMAW?
• Which of the following is an acceptance criterion for a fillet weld in structural steel per typical codes?
• What is the purpose of the root pass in a plate weld?
• On a constant-voltage welding machine, which parameter decreases as electrode extension increases?
• Which visual sign indicates porosity in a weld?
• Root opening for carbon steel welded without edge preparation is 1/16 inch.
• Incomplete fusion is sometimes described as overlap. Which statement best describes it?
• Starting an arc becomes increasingly difficult as electrode extension increases.
• What is the purpose of a tack weld layout pattern, and how does it help control distortion?
• How can you assess penetration in a groove weld without destructive testing?
• How does carbon content in base metal influence GMAW parameters and cracking risk?
• Which statement accurately describes spray transfer in GMAW?
• What is post-weld cleaning and when should it be performed?
• For stainless steel thicker than 1/4 inch using GMAW, a slight side-to-side movement should be used.
• Which voltage characteristic is commonly used for GMAW equipment?
• What is the purpose of a gas lens in MIG welding?
• What parameter is most directly responsible for controlling penetration depth in GMAW?
• What is the primary function of shielding gas flow during MIG welding?
• What defect is indicated by a rough, crater-like opening at the end of a bead?
• What effect does a short arc length have on weld quality in GMAW?
• What factors determine a good bead profile in GMAW and how are they adjusted?
• To avoid burn-through when welding a thin plate, which approach is typically used?
• Which statement describes the flat welding position and its relative ease for GMAW, compared to the horizontal position?
• What preheating or interpass conditions are typically recommended for high-carbon steels to minimize cracking in GMAW?
• What is the effect of aluminum oxide on weld quality and how is it removed before welding?
• Which of the following is a correct shielding gas option for short-circuit transfer on carbon steels and low-alloy steels?
• Which gas mixture is used for short-circuit transfer on carbon steels and low-alloy steels?
• Which practice is essential to minimize contamination and ensure corrosion resistance when welding stainless steel?
• Which shielding gas is appropriate for aluminum welding with GMAW?
• In a multi-pass groove weld, why is a root pass often required in GMAW and what may happen if skipped?
• How can you minimize porosity when using GMAW in a windy outdoor environment?
• If the contact tip-to-work distance (CTWD) is not maintained properly, the weld is likely to have which issue?
• Why is removing moisture from the base metal important before GMAW?
• Pulsed spray transfer is used to weld a wide variety of metal thicknesses.
• DCEN is impractical with GMAW because which factor is true?
• What pre-weld cleaning steps are essential for a good GMAW weld?
• Which GMAW transfer modes are the two main modes used in Level 2 practice?
• DCEP polarity in GMAW generally results in which outcome compared to DCEN?
• How does improper grounding affect GMAW?
• Which statement best describes the production rate difference between GMAW and GTAW?
• What is the typical weld sequence for a full-penetration groove weld from root to cap?
• In semiautomatic GMAW, the operator sets the welding parameters, and the welding gun is controlled by a mechanical device.
• What is 'pulsed spray' GMAW and what are its benefits?
• Whiskers in a weld joint are caused by
• How does wire diameter influence current range and bead profile in GMAW?
• Gas drift away from the weld area most directly leads to which problem?
• Which parameter is most directly influenced by choice of shielding gas in GMAW?
• Why is it important to keep the welding gun at a slight angle during GMAW?
• What is interpass cleaning and why is it important in multi-pass GMAW?
• In aluminum welding, which statement best describes a spool gun's benefit?
• Which conditions favor short-circuit transfer in GMAW?
• What is the correct description of shielding gas flow and its adjustment in MIG welding?
• What is the consequence of neglecting interpass cleaning in multi-pass welding?
• Which statement is false?
• Why is it important to clean rust or oil from the base metal before welding?
• Which drive-roll type is suitable for soft welding wires?
• What information do welding symbols convey about a groove weld on a drawing, and how should a welder interpret size and length?
• What is the recommended sequence for a typical GMAW weld on a plate: root, fill, cap?
• What is crater fill used for in GMAW?
• Hydrogen shielding gas usage in GMAW: which statement is correct?
• Which factors most directly influence bead width in GMAW?
• Which transfer mode in GMAW provides a smooth bead with high deposition rate and is commonly used with high currents?
• What statement about Wire Feed Speed (WFS) is true?
• Spray transfer in GMAW typically results in which characteristic compared to short-circuit transfer?
• Which condition is most likely to cause porosity in a GMAW weld?
• Which statement about short circuiting transfer is true?
• Why is ER70S-6 commonly chosen for welding plain carbon steel in GMAW?
• What does the toe and root refer to in a welded joint?
• What effect does cleaning metal have on weld quality before GMAW?
• Subsurface porosity in a GMAW weld can result from what cause?
• Incomplete fusion occurs when
• In GMAW, what parameter primarily dictates the deposition rate for a given joint design?
• What is the function of the drive rolls in the wire feed system?
• Compare 100% CO2 shielding gas with a mixed Argon/CO2 (e.g., 75/25) for GMAW of carbon steel, including effects on spatter, penetration, and arc stability.
• Pulsed spray transfer is used to weld a wide variety of metal thicknesses.
• Name three common joint configurations for GMAW on flat stock.
• Name one major difference between short-circuit transfer and spray transfer in GMAW.
• What is the effect of travel angle on bead shape and penetration in GMAW?
• Surface porosity in a weld is caused by insufficient current.
• Which statement is true about transfer modes and current?
• What is crater fill and how is it achieved in GMAW?
• To minimize porosity in outdoor welding, which practice is recommended?
• Compared to short-circuit transfer, spray transfer in GMAW provides what characteristic?
• Which factors should be considered to compare heat input across two GMAW setups?
• Which of the following is part of essential pre-weld cleaning steps?
• Which polarity is most commonly used for GMAW?
• What is the effect of shielding gas purity on arc stability in GMAW?
• Globular transfer produces a stable arc, excellent weld appearance, and little weld spatter.
• Gas drift is the phenomenon that results in inadequate shielding when welding in windy conditions.
• How does preheating affect hydrogen-induced cracking in low-alloy steels?
• Direct current electrode positive (DCEP) produces what characteristics in GMAW?
• What effect do shielding gas coverage and arc length have on porosity in GMAW?
• Globular transfer is used for welding metal thicker than 1/2 inch.
• Why is base metal cleanliness critical to GMAW?
• What is the purpose of anti-spatter in GMAW and when should it be applied?
• What is the main purpose of using a spool gun when welding aluminum?
• What is the effect of arc length on spatter and weld quality in GMAW?
• Which steps verify correct polarity in GMAW, and what issues arise from incorrect polarity?
• How does the shielding gas composition affect bead profile and spatter?
• Wire feeders are designed for a wide range of solid and metal-cored welding wire from which diameter range? Which diameter falls within this range?
• Spray transfer produces high deposition rates.
• Which wire diameter is outside the range 0.023 to 1/16 inch?
• Interpass temperature and limit: what is the proper description and typical limit for carbon steel when performing multiple passes?
• How can porosity form in a GMAW weld and what steps minimize it?
• Using 100% CO2 shielding gas tends to cause what in GMAW?
• Which statement about shielding gas use for aluminum welding is correct?
• Which filler metal families are commonly used in GMAW for carbon steel, stainless steel, and aluminum, and what are their typical applications?
• How can weld distortion be minimized when welding a long seam on a plate?
• What post-weld cleaning steps are appropriate for stainless steel welded with GMAW to preserve corrosion resistance?
• What are common causes of excessive weld spatter and how can you reduce it?
• What welding positions are typically considered in GMAW, and which are most challenging?
• For carbon steel welded without edge preparation, what root opening is recommended?
• Which technique helps prevent crater cracking at the end of a weld bead in GMAW?
• What is the main purpose of shielding gas coverage in GMAW?
• GMAW produces a heavy slag coating that is easily removed.
• What is the primary function of shielding gas in GMAW, and how does gas type influence weld quality?
• Crater cracks can be caused by improperly filled craters.
• Two variables that affect droplet transfer in short circuiting transfer are
• Which type of wire feeder is commonly used when welding with soft, small-diameter electrodes?
• In a constant-voltage GMAW system, increasing wire feed speed will cause voltage to
• Which filler metal is commonly used for welding stainless steel 304/304L?
• How does wire diameter affect deposition rate and the required current in GMAW?
• What is the recommended practice for restarting a welding arc after a brief power interruption?
• Short circuiting transfer is used most frequently at current levels less than 200 A.
• What is the function of tack welds in GMAW and how are they removed after final welding?
• Which shielding gas is typically used for GMAW of mild steel with ER70S-6 wire?
• In spray transfer, which condition favors spray transfer?
• Which statement correctly contrasts GMAW and GTAW in terms of electrode usage and production rate?
• True or False: Steel from 1/4 inch to 1/2 inch thick may be butt welded with no edge preparation.
• What is the role of crater fill in GMAW termination?
• What is the recommended gas flow rate range for MIG welding on mild steel with 75/25 gas?
• What fire safety equipment should be kept nearby when welding?
• What is the difference between a root pass and a fill pass?
• Greater penetration is obtained using which technique?
• Which action helps mitigate arc blow related to grounding in GMAW?
• What is the primary role of shielding gas in GMAW?
• Which joint configuration is formed when a member is welded to the end of another at a right angle to create a T shape?
• What is the typical arc length for a stable GMAW arc on mild steel?
• Why is maintaining a clean, oxide-free surface on aluminum before welding important?
• In GMAW, increasing wire feed speed with a constant voltage typically results in what change?
• How is arc start typically initiated in GMAW?
• DCEN is used for most GMAW applications.
• How can you verify that the welding machine is delivering the set voltage and current?
• What is interpass cleaning and why is it important in multi-pass GMAW?
• What is the purpose of back purging in stainless steel welding?
• What is back purging in GMAW of stainless steel and when is it used?
• How can travel speed, torch angle, and work angle influence spatter and bead shape?
• What is the purpose of maintaining a proper contact tip-to-work distance (CTWD) in GMAW?
• Which shielding gas is commonly used when welding aluminum with GMAW?
• When welding different thicknesses in a single joint, what pass strategy reduces defects and improves fusion?
• How can you determine if your GMAW settings are producing adequate throat thickness?
• Signs of lack of fusion in a groove weld, and how can it be prevented?
• What basic steps should be taken to prepare base metal surfaces before GMAW?
• Increasing electrode extension in GMAW tends to cause what change in welding current?
• What is a common cause of arc blow and how can it be mitigated in GMAW?
• What is the purpose of tack layout patterns for long welds, and how do they help control distortion?
• When welding joints with varying thickness, what is the typical sequence of passes?
• Which of the following is not a feature of GMAW?
• In a constant-voltage welding machine, increasing electrode extension affects current by decreasing it.
• The transfer type that occurs at lower current and voltage levels with smaller diameter welding wires is
• What conducts the welding wire, shielding gas, and welding current to the welding gun?
• Gas drift away from the weld area most directly leads to which problem?
• GMAW is not well suited for use in windy areas.
• How do you manage storage and handling of welding filler wire to avoid moisture-related porosity?
• How does inadequate gas coverage lead to weld defects?
• Whiskers are most likely produced by
• In ER70S-3 designation, the letter S denotes short circuit transfer.
• How should the contact tip be sized relative to the welding wire?
• In a constant-voltage welding machine, arc length tends to remain constant when electrode extension changes.
• With pulsed spray transfer, current changes from DCEP to AC each cycle.
• Globular transfer is often used for welding metal more than 1/2 inch thick.
• Which statement is true about current type for overhead welding on mild steel?
• Why is maintaining proper root opening important in groove weld preparation?
• What defect is most commonly caused by insufficient cleaning of the base metal before GMAW?
• What is spatter in GMAW?
• The transfer of molten metal in large droplets from the welding wire across an arc to the workpiece is known as
• Short circuiting transfer is used most frequently at current levels less than 200 A.
• Which statement about globular transfer is true?
• What practice helps mitigate cracking risk when welding carbon-containing steels with GMAW?
• For short-circuiting transfer on carbon steels and low-alloy steels, which shielding gas is preferred?
• When welding stainless steel more than 1/4 inch thick using GMAW, a slight side-to-side movement should be used.
• What is porosity and how can it be detected visually?
• Cleaning base metal prevents which defects?
• Describe the effect of increasing CTWD on arc length, voltage, and penetration.
• What are crater cracks in GMAW and how can they be prevented?
• What is interpass temperature and why is it important in multi-pass welds?
• Which scenario is likely to cause excessive penetration during GMAW?
• For spray transfer on nonferrous metals, which shielding gas composition is used?
• Which method is used to verify that throat thickness meets joint design requirements?
• Which of the following is NOT a consequence of incorrect polarity in GMAW?