418 Flashcards
In oxyfuel welding, you can control the rate of heat input to the base metal by varying the
Speed of the torch
In torch brazing, the filler metal is distributed in the joint as a result
Capillary action
The purpose of using a flux in welding and brazing is to
Clean the base metal
The purpose of post heating is to
Reduce stresses in welding structures
When you weld low carbon steel you should
Dip the filler rod in to the weld puddle
When welding aluminum, you need to remember that aluminum
Conducts heat away rapidly from the weld site
In preparing aluminum parts for welding, you should ___ the surfaces to be welded
Scrape or file
When welding brass, you should use
Flux
What kind of flame should be used when welding lead? ___ nickel? ____ Magnesium? ___
Neutral, Carburizing, Carburizing
To make the best possible welds using oxyfuel equipment you should know
Know what metals your joining
Oxyfuel welding and oxygen cutting are alike in that both processes
Requires lighting the torch with a spark lighter
Which of the following must be worn during an oxygen cutting operation?
Goggles with dark lenses
When piercing a steel plate with an oxygen cutting torch, which step should be performed first?
Heat the spot to a bright red
The purpose of scaring is to
Remove a surface defect from unfinished steel
If you need to cut a metal other than mild steel or medium carbon steel you might make a difficult job easier if you lay
Lay a bead of low carbon steel along the cut line
