Soalan Objektif Kimpalan MIG

What is meant by MIG welding?

• Welding using coal

• Welding with molten metal

• Arc welding using shielding gas and wire electrode

• Welding using laser

What is the main advantage of MIG welding compared to SMAW?

• Uses solar energy

• Less skill required and faster

• Can weld all types of plastic

• Cheaper for all materials

Which gas is commonly used in MIG welding?

• Oxygen and Nitrogen

• Helium and Hydrogen

• Argon and Carbon Dioxide

• Acid and Ammonia

What is the function of shielding gas in the MIG welding process?

• Cool the electrode

• Cause molten metal to solidify faster

• Protect molten metal from air contamination

• Give color to the metal

MIG welding is suitable for the following metals EXCEPT:

• Aluminum

• Carbon Steel

• Plastic ABS

• Stainless Steel

Why is the electrode wire in MIG continuously fed?

• To keep the machine running

• So that gas flows faster

• Because it becomes filler material during welding

• To save energy

Among the following, which is the main risk during MIG welding?

• Cold

• Getting splashed with sparks and UV radiation

• Miscalculating gas pressure

• Running out of chemicals

What is the main guideline in setting current and voltage in MIG welding?

• Based on machine size

• Based on metal price

• Based on metal thickness and wire type

• Based on room temperature

What is the main cause of porosity problems in MIG welding?

• Metal too hard

• Insufficient shielding gas flow

• Machine too new

• Nozzle too long

What is the main difference between MIG and MAG?

• MIG uses electricity, MAG uses water

• MIG uses inert gas, MAG uses active gas

• MIG is only for steel, MAG is for aluminum

• MAG is cheaper because it doesn't use gas