Week One Test Flashcards
A mixture of two or more metals to form a part of steel is
Alloy or alloy steel
The base element that determines the following nature of steel is
Iron
All stainless steel’s contain iron as the main element and this other element in amount ranging from approximately one to 30%
Chromium
Defined by the resistance of a metal to local penetration by a harder substance is
Hardness
The property of a metal that allows it to be stretched or otherwise changed in shape without breaking is
Ductility
NASTM specification for a steel product consist of the letter a for
Ferrous such as A36
When metal is heated up what happens?
It expands
What are some ways to identify a bar of metal?
An appearance test, a hardness test, a magnetic test, a chisel test and a spark test
What are the five basic weld joints?
Corner joint, edge, joint, lap joint, butt joint, tea joint
What is the difference between welding and brazing?
While braising, the base metal is not melted
What are the features of a carburizing flame?
A car rising flame has an inter flame cone, and an outer blue envelope to her house
What is the list of oxy acetylene flames in order?
Carburizing, flame, neutral flame, oxidizing flame
The melting together, a filler, metal and base metal or of base metal only to produce a weld
Fusion welding
The best way to move OXY and acetylene is with
A cylinder cart
This permits, a loud and shrill squeal or hissing sound
A flashback
What is the worst or toxic fume to inhale while welding with this metal?
Galvanized steel
Oxy acetylene cutting is confined to this type of metal
Ferris metals
There is something wrong with your oxygen set up on your oxy acetylene cylinders you should
Have a qualified person repair
True or false, the thicker, the metal, the smaller, the orifice for oxy acetylene welding
False
True or false, a higher carbon amount in steel, the lower the melting point
True
When cracking a oxygen or settling cylinder, what happens
You open the valve and allow any dust or particles to blow out and then close the valve and apply the regulator
True or false acetylene bottles have right handed threads
False
A type of strengthening for metal that happens quickly
Quenching
Ventilation standards are set by this organization
Cal OSHA
True or false cooling factor, heat treatment
True
The last two digits in the a I S I number stand for
Nominal carbon content in 1/100 of a percent
When flame cutting this chemical reaction process happens to separate metals
A type of sped up oxidation
Between high carbon and low carbon, which one has a lower melting point
High carbon steel has a lower melting point
When choosing a filler metal the metal allergic composition should be
Close between the base, metal and filler metal
What type of metal has a BNH of 600+
Metal harder than a file
When too much slag forms while oxy cutting, you are
Cutting too slow
All position certified weld
6G
Developed when there is good penetration on a root weld
A keyhole
Shielded from inert gas supply
GMAW gas metal arc welding
Means reverse polarity
DCEP Direct Current electrode Positive
Vertical position weld
3G
SMAW
Utilizes a rod coated with a baked flux
Electrode is negative
DCSP direct current straight polarity
Flat fillet weld position
1F
Burns out impurities after the root pass
Hot pass
Covers the weld deposit and provides additional protection from the atmosphere
Slag
Tubular or Cored electrode
FCAW
Uses a tungsten electrode
GTAW
The study of metals or metal properties
Metallurgy
Used to measure relative toughness
Impact test
The process of a metal growing larger when heated
Thermal expansion
Used to identify an unknown piece of metal by removing a small amount
Chip test
Metals having an iron base
Ferrous
Metals containing no iron
Non-ferrous
The ability of a metal to resist surface penetration, indentation, or abrasion
Hardness
Compound of carbon and hydrogen
Acetylene
An ignition inside of a blow pipe or hoses
Flashback
The process of removing hardness by cooling a metal slowly
Annealing
The process of reheating and re-quenching order to remove brittleness
Tempering
The ability of a metal to resist being pulled apart
Tensile strength
