Week 10 Flashcards
It joins metal by melting them together by the heat of a torch
Oxy-acetylene welding
It is useful when it is necessary for the equipment to be portable when welding relatively thin materials or when amount of heat applied must be varied and controlled
Oxy-acetylene welding
Oxy-acetylene also known as
Gas
It is the most common form of welding
Oxy-acetylene welding
The process of joining two pieces by partially melting their surfaces and allowing them to flow together is called
Fusion
The other 2 fusion processes are
Electric arc welding
Thermit welding
In the oxy-acetylene process, the metal is heated by the _______
Hot flame of a gas-fed torch
_____ clothing must be worn by the operator
Flame-resistant
____ and ____ should not be done near flammable materials such as wood, oil waste or cleaning rags
Welding
Cutting
These supplied from cylinders to provide the flame
Oxygen and acetylene gas
These control the flow of the gases
Regulators and valves
It measures the pressure of the gas
Gage
It carry the gases to the torch
Hoses
It mix the gases and provide a handle for directing the flame
Torch
It control the flame
Tip
Full oxygen cylinders are pressurized from ____ to _____
2000 to 2600 psig
It reduces high pressure to suitable working pressures
Regulators
all connections conform to specifications and standards set
by the compressed gas association
Inlet connection
_______connections have right hand
threads
Fuel gas
it control the flow of gas and delivery pressure to the hose and torch
Pressure adjusting screw
When the adjusting screw is turned ______, it will allow gas to flow through the regulator to the hoses and torch
Clockwise
If it is turned ______, the regulator will not allow the gas to flow
Counter clockwise
it indicates the cylinder supply pressure
High pressure gage
it indicates the delivery pressure from the regulator to the
hose and torch
Low pressure gage
they are where the welding hoses are attached
Outlet connection
it transport low pressure gases from the regulators to the torch
Hoses
Oxygen hoses are color
Green
Fuel hoses are color
Red
All approved fabricated hoses are
Flame retardant
This serves as preservative for the new hoses
Talcum powder
it is essentially a set of gas tubes with control valves
Welding torch handle
It controls the acetylene supply for the tip or attachment
Welding torch handle
there are two control valves marked as ___ and ___
Fuel or gas
Oxy
it is designed to keep the oxygen and acetylene gases separated
Barrel
oxygen supply move through the
____to the torch head
Inner tube
acetylene supply travels through the
Exterior cavity
it is threaded onto the barrel
Torch head
The oxygen supply is directed through the ______ from the ______ while the fuel or acetylene passes through the _____ around the oxygen port.
Center hole
Inner tube
Drilled orifice
is an assembly with cone and mixer with coupling nut
Welding tip
Welding tip is an assembly with ____and _____ with _____
Cone
Mixer
Coupling nut
The welding
tip is a ____tube that has been drilled on one end and swaged to a specific orifice size
Copper
designed to mix the oxygen and acetylene gases
Cone and mixer
Repeated cleaning of the orifice tip may ____ the original size
Alter
(Accessories)
it is used to light the tip.
Spark lighter
(Accessories)
they are for the protection of the eyes from the glare produced by the
flame during the welding process.
Goggles
Cylinders are to be kept in a _____ position.
Vertical
It appear if leak is present
Bubbles
forehand welding, also called
Puddle or ripple welding
ideal for thin plate; it permits better control of a small puddle and
results in a smoother weld
Forehand welding
(Welding)
you point the flame
in the direction of travel
Forehand welding
(Welding)
you point the flame away from the direction of travel and back at the molten puddle and completed weld
Backhand welding
(Welding)
best suited for material more than 1/8 of an inch thick.
Backhand welding
