Virtual Labs

Principles of Metal Inert Gas Welding

What does GMAW stand for?

a: Gas Magnetic arc welding Explanation

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b: Gas Metal arc welding Explanation

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c: Gas Mixed arc welding Explanation

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d: All of the above Explanation

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Which of the following metal transfer mode can occur during MIG welding?

a: Globular transfer Explanation

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b: Short Circuit Transfer Explanation

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c: Spray transfer Explanation

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d: All of the above Explanation

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What is the main advantage of GMAW welding over other GTAW?

a: high metal deposition Explanation

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b: Lower cost Explanation

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c: Better penetration Explanation

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d: All of the above Explanation

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What is the use of the shielding gas in GMAW welding?

a: Prevent oxidation Explanation

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b: Increase the heat of the weld Explanation

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c: Make the weld stronger Explanation

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d: Cool the weld Explanation

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Which of the following shielding gases is typically used to achieve shallower penetration in GMAW welding?

a: Argon Explanation

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b: Carbon dioxide Explanation

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c: Helium Explanation

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d: Oxygen Explanation

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What is the effect of using a higher voltage in MIG welding?

a: Shorter weld bead Explanation

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b: Larger weld bead Explanation

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c: Better penetration Explanation

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d: Higher strength of the weld Explanation

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How does using a larger diameter wire affect the MIG weld?

a: Improves penetration Explanation

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b: Decreases penetration Explanation

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c: Makes the weld stronger Explanation

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d: No effect on the weld Explanation

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What is the effect of using a lower amperage in MIG welding?

a: Shorter weld bead Explanation

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b: Larger weld bead Explanation

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c: Better penetration Explanation

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d: Decreased strength of the weld Explanation

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For consistent arc length which type of power source is used by GMAW process?

a: Constant Current power source Explanation

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b: Constant voltage power source Explanation

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c: Both a & b Explanation

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d: none of the above Explanation

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In which of the following metal transfer mode metal transfer in the form of large droplets to the workpiece

a: Spray Transfer Explanation

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b: Short circuiting transfer Explanation

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c: Globular transfer Explanation

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d: Pulsed arc transfer Explanation

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Which of the following shielding gases are used for the welding of various carbon steels?

a: Helium Explanation

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b: Nitrogen Explanation

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c: Argon/CO2 Explanation

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d: None of the above Explanation

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