Metal Joining processes

Tick all of the hazards that could be present when heat joining metals. ie welding or soldering

• Burns from hot metal

• Eye damage from bright light

• Clothing catching on fire

• ear damage from noise

True or false. The 'Parent' metal is the metal being joined and the 'filler' metal is the metal that will be melted into the join.

• True

• False

What makes soldering different from welding? Pick one.

• Nothing, they are both the same

• Soldering melts the two parent metals together, welding does not.

• Welding melts the two parent metals together, soldering does not.

• You use different filler metal to the parent metal in welding.

True or false. Welding uses a filler metal that is similar to the parent metals. (ie those being welded)

• True

• False

Tick all of the features of soldering

• High temperature

• Uses low melting point filler metals around 450 deg melting point

• Stronger than welding

• Flux must be used.

• Different parent metals can be joined.

Tick all the correct statements about gas welding.

• It uses electricity to make the join.

• We burn acetylene and oxygen to create the heat for joining.

• The filler rod must be the same as the parent metal.

• Two parent metals must be similar.

• Uses low temperature.

What do the letters MIG stand for when welding?

• Multi Inert Gas

• Metal Inert Gas

• Metal inert Gorillas

• Metal in Gas

Tick all of the correct statements about MIG welding.

• An inert gas is used to shield the weld.

• Disimilar parent metals can be joined

• A single filler rod is used

• A continuously fed filler rod is used.

• It uses electricity to create the heat.

Why is gas used in MIG welding. Pick one

• To help melt the metal

• To keep the weld clean and strong by shielding the weld from contaminants in the air.

• To burn and help the weld

Spot welding is used to weld car body panels together. Tick all statements that are true.

• It uses electricity and pressure to melt and force the metal layers together.

• A filler metal is used

• Both sides of the join must be accessible.