Welding And Cutting Processes (110103f) Flashcards
What does OAW stand for?
Oxygen and acetylene welding
What does SMAW stand for?
Shielded metal arc welding
What does GMAW stand for?
Gas metal arc welding
What does GTAW stand for?
Gas tungsten arc welding
What does FCAW stand for?
Flux core arc welding
Shielded metal arc welding us know as what?
Stick welding
Gas metal arc welding is know as?
Mig welding
A process using a continuous, solid wire electrode and an inert shielding is?
GMAW
Gas metal arc welding
A process using a continuous, hollow wire electrode with or without shielding gas is?
FCAW
Flux cored arc welding
Mostly known as gasless mig welder
Three types of flames available for OAW (oxygen and acetylene welding) are?
Carbonizing
Neutral
Oxidizing
If the oxygen connection is difficult to make it should be oiled to lubricant the fitting true or false?
False
Where does a burnback occur?
Between the tip and mixer
Where does a flashback occur?
Between the mixer and regulators
Copper tubing can be used to spice a damaged hose true or false?
False
Braze welding does not involve the melting of the parent materials true or false?
True
Brazing sheet metal requires a filler material made from what?
Brass
What are the purposes of fluxes in braze welding?
Clean the oxides
Protect the weld
List the two types of joints used for braze welding?
Butt joint
Lap joint
Oxy acetylene and plasma cutting do not actually cut the metal the metal separates due to?
Oxidization of the metal
The oxygen torch valve on the handle of a cutting/ welding outfit should be opened how much for cutting?
Fully
What does a plasma arc use to create heat necessary for cutting?
Electric energy
What is a backfire?
The flame backs up into the tip and re-establishes itself with a bang or pop
What is burnback?
This is when combustion takes place steadily in the tip and mixer and since the mixture of gases is too lean for proper combustion, black smoke, red sparks and a screeching sound can occur
What is a flashback?
This is when one gas may back up into the other line forming an explosive mixture and resulting in an explosion
What materials are suitable for cutting with an oxyacetylene torch?
Ferrous metals such as steel
What materials are not suitable for cutting with an oxyacetlene torch?
Non ferrous metals such as copper, brass, bronze, aluminum
What are three main types of cutting torches?
- Combination welding and cutting
- heavy duty hand cutting torch
- machine torches
What does a plasma torch use to cut through metal?
A plasma arc cutter uses compressed gas and electricity to produce a finely focused super heated plasma flow that can cut through metal
What is a reasonable tip diameter of a welding tip?
1/8 plus two metal thickness of the gauge of metal being used
How is one way to test your spot weld quality?
On a test piece or scrap pieces
What is the first step for a complete shutdown of an oxyacetylene torch?
Close the oxygen cylinder valve first
Iron and steels oxidize slowly in moist air to form?
The oxide known as rust
