metal addition / fabrication

Question 1

MIG

Answer 1

tubular products
bike frames

uses an electrode wire, thin metals
inert gas
one off fabrication or assembly line

Question 2

TIG

Answer 2

stainless steel ladders
swimming pool ladder
welding car exhausts

uses a filler rod
accurate
strong
requires high skill and slow method
uses inert gas

Question 3

spot welding

Answer 3

weld mild steel sheet at points along a length

sheet held between two copper electrodes that form a weld when charged electrodes make contact with metal

Question 4

oxy-acetylene welding

Answer 4

mild steel sheet tube or plate
arc welding processes are not available

uses a steel filler rod
good for quick repair or in remote locations with no electric supply

Question 5

soldering

Answer 5

lightweight applications
joining precious metals for jewellery or copper pipe plumbing

uses filler material of lower melting point
typically alloy of tin and copper

Question 6

brazing

Answer 6

lower temp
joining thinner gauge mild steel tube or bar

uses brass filler rod
one off or small batch
joins dissimilar metal sheets

Question 7

riveting

Answer 7

sheet metal or plate joining

2 pieces overlapped and drilled
end of shaft is hammere over to join
pop riveting uses rivet gun
good for when underside of joint is inaccessible