GAS METAL ARC WELDING - Practice Mode

1) What defects occur to a weld joint, if it is provided with insufficient heat input?

Lack of fusion Lack of penetration Lack of metal deposit Uneven bead deposit

Correct Answer: Lack of penetration

2) What is the solution if burn back occurs due to irregular wire feeding in GMAW process?

Cut out kink wire Replace of spool Cut the kink wire and replace spool Adjusted to kinked wire again

Correct Answer: Cut the kink wire and replace spool

3) Which metal surfacing method is ideal for thin layers that can flow to corner and edges of the job?

TIG welding MIG welding Oxy-acetylene welding Submerged arc welding

Correct Answer: Oxy-acetylene welding

4) Which type of core wire is suitable for welding carbon steel, alloy steel and stainless steel under FCAW?

Flux cored electrode Gas shield flux wire Used flux core and gas shielded Flux is external and shielded

Correct Answer: Flux cored electrode

5) What is the distinct differences between GMAW and FCAW equipments?

Nozzle and torch Construction of torch and feed rollers Machine and torch Feed rolls and gas cylinders

Correct Answer: Construction of torch and feed rollers

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