GAS METAL ARC WELDING - Practice Mode

1) Which is adjusted in electron beam welding to eliminate the defect of porosity?

Spot size Deflection Weld penetration Focal position / focus current

Correct Answer: Deflection

2) What is the limitation for submerged arc welding process?

Limited to vertical position Limited to non ferrous metals Limited to over head position Limited to flat and horizontal fillet welds

Correct Answer: Limited to flat and horizontal fillet welds

3) What ampere range required for setting 1.2mm filler wire for welding mildsteel in MIG/MAG welding?

50 - 100 Amps 70 - 120 Amps 90 - 150 Amps 100 - 225 Amps

Correct Answer: 100 - 225 Amps

4) Which combination of shield gas in GMAW process produce good arc stability for carbon steel?

Argon + 20% CO<sub>2</sub> CO<sub>2</sub> Pure argon Argon + 5% CO<sub>2</sub>

Correct Answer: Argon + 5% CO<sub>2</sub>

5) How the filler wire is fed in the GMAW welding process?

Manually No feeding Automatically Semi automatic

Correct Answer: Automatically

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