GAS METAL ARC WELDING - Practice Mode

1) Which is the remedy for the contraction of weld metal due to excess of heat input that moves the base metal changes the angle?

Support on solid surface with two hands Check gas flow rate and leakage of gas Use clean and dry weld wire Weld small segments and allow cooling

Correct Answer: Weld small segments and allow cooling

2) What is the operation to clean the cylinder valve before fixing the regulator to the argon cylinder?

Closing Opening Shutting Cracking

Correct Answer: Cracking

Explanation:

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3) What defect will occur in the weld metal if the arc voltage and travel speed is low in MIG / MAG welding?

Blow hole Under cut Wire struck Weld overlap

Correct Answer: Weld overlap

4) What is the effect in MIG / MAG welding for a short stick out distance?

Porosity in weldment Arc blow in weldment Less spatter deposit in nozzle More spatter deposit in nozzle

Correct Answer: More spatter deposit in nozzle

5) What is the weld defect if wire feed speed too high?

Porosity Spatters Incomplete fusion Lack of penetration

Correct Answer: Spatters

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