Metal Addition/fabrication Processes

Question 1

What does MIG welding stand for?

Answer 1

Metal inert gas

Question 2

What types of metals is mig welding used to weld?

Answer 2

Thin gauge metals(medium carbon steel) or aluminium

Question 3

What is MIG welding used to form!

Answer 3

Tubular sections of products such as climbing frames, bike frames or vehicular exhausts

Question 4

What action is done to complete the mig welding?

Answer 4

Swirling action

Question 5

What is the inert gases used for in mig and tig welding?

Answer 5

To replace the oxygen at joint areas to prevent oxidisation(rusting)

Question 6

What metals is TIG welding used to weld?

Answer 6

Stainless steal or non-ferrous metals. For example stainless steel ladders for bots or pools or stainless steel exhausts

Question 7

What does TIG stand for?

Answer 7

Tungsten inert gas

Question 8

What is one benefit of TIG and one dissadvantage?

Answer 8

Allows for greater control from the operator (creates stronger welds) but the process requires higher levels of skill

Question 9

When is oxy-acetylene welding useful?

Answer 9

For quick fixing jobs (magic Mike scene) or when there is no electricity available

Question 10

Why are the metals prepared by carving a v into them?

Answer 10

To ensure weld runs through entire thickness of metal

Question 11

What is another name for brazing?

Answer 11

Hard soldering

Question 12

In brazing, what is applied to prevent oxidisation?

Answer 12

Flux

Question 13

What approximate temp is the joint heated to using oxy-acetylene?

Answer 13

850 degrees

Question 14

What is solder typically made from?

Answer 14

An alloy of tin and copper

Question 15

When is riveting typically used?

Answer 15

Used to join sheet metal

Question 16

What shape is the rivet shaft?

Answer 16

Dome shaped

Question 17

How are the parts joined in riveting?

Answer 17

End of the shaft is hammered over to squeeze the two parts together

Question 18

When is pop riveting ideal?

Answer 18

When the underside of a joint is inaccessible

Question 19

What is the difference in the rivet in normal and pop riveting?

Answer 19

In pop riveting there is an steel pin

Question 20

What gas is used in flame cutting?

Answer 20

Oxy-acetylene

Question 21

What temperature does the flame exceed in flame cutting?

Answer 21

3500 degrees

Question 22

What is flame cutting used for?

Answer 22

Cutting low carbon alloy steel plate

Question 23

What is the use of the additional jet of oxygen in flame cutting?

Answer 23

Intensifies the flame and pierces the metal

Question 24

What is the negative of flame cutting?

Answer 24

Difficult to maintain a parallel line

Question 25

What is the use of the shielding gas in MIG WELDING?

Answer 25

The inert gas (eg CO2) forms a flux shield over joining area which replaces oxygen in this area. This helps to prevent oxidisation that would prevent weld from forming properly.

Question 26

What is the main difference between MIG and TIG welding?

Answer 26

The electrode melts from the gun in MIg welding whereas there is a separate electrode in TIG welding which the controller operates

Question 27

In OXY-ACETYLENE WELDING how are the two pieces welded together?

Answer 27

Using a filler rod and a welding torch introduced to the joining area