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WorksheetsArc and MIG Welding Quiz
Total questions: 10
Worksheet time: 5mins
What is the main heat source used in arc welding?
Chemical reaction
Electric arc
Friction
Laser beam
Why is frequent rest important for arc welders?
To prevent the electrode from overheating
To improve electrical efficiency
Because hand–eye coordination work is stressful over long periods
To reduce gas consumption
What is a characteristic of a consumable electrode in arc welding?
Made only of non-metallic material
Consists of core wire coated with flux material
Does not melt during welding
Cannot be used with shielding gas
What is the purpose of the shield (gas and/or flux) in arc welding?
To colour the weld metal
To cool the electrode
To cover the arc and weld pool, protecting the operation
To increase electrical resistance
Which of the following is NOT a function of slag?
Protects the weld until it cools
Prevents rapid cooling of weld metal
Controls the shape of the completed weld
Increases corrosion of the weld metal
What is another name for Metal Inert Gas (MIG) welding?
Shielded Metal Arc Welding (SMAW)
Gas Metal Arc Welding (GMAW)
Flux Cored Arc Welding (FCAW)
Submerged Arc Welding (SAW)
How should the metal surface be prepared before MIG welding?
Leave rust and oil to improve conductivity
Wipe lightly with a cloth only
Clean down to bare metal with a metal brush or grinder
Cool it with water
What polarity does MIG welding require?
AC electrode negative
DC electrode negative
AC electrode positive
DC electrode positive (reverse polarity)
What should you do if you spot a leak in the gas hose?
Wrap it with tape
Reduce the gas flow
Continue welding carefully
Discard the hose and install a new one
Which of the following can cause poor wire feeding performance in MIG welding?
Using DC electrode positive
Incorrect tension on drive rolls or wire spool hub
Cleaning the metal surface too well
Maintaining a stickout of 10 mm
