Midterm Review Flashcards
True or False: Some welding methods bring the metal to a fluid state, and the edges flow together.
True
True or False: Getting the parts of an assembly properly positioned may take more time than it takes to do the welding.
True
True or False: All welding and cutting processes produce undesirable by-products.
False
True or False: Ozone is very irritating to all mucous membranes.
True
True or False: All metals distort by contraction when heated.
True
True or False: Flat position welds can be made at a lower rate of travel than most other weld positions.
True
True or False: It is considered good practice in the field to stop a weld at the corner of a joint.
False
True or False: Welds can be made on one side or both sides of the joint.
True
True or False: The welding process to be used has a minor effect on the selection of the joint design.
False
True or False: Some codes and standards require specific edge preparations.
True
What is the measurement of electrical pressure in welding similar to pounds per square inch in water?
Voltage
The amount of heat produced by the arc is determined by the _______.
amperage
In direct-current electrode positive, the electrode is positive, and the work is _______.
negative
Open circuit voltage is the voltage at the electrode _______.
after striking an arc
True or False: Before the invention of the inverter-type welder, each type of welding required a separate machine.
True
The terms welding cables or welding leads are used to mean the same _______.
thing
A very long arc length results in frequent _______ and sticking of the electrode.
shortening
True or False: Long arc lengths produce less spatter.
True
A forehand electrode angle drags molten metal and slag _______ of the weld.
ahead
A backhand electrode angle pushes the molten metal and slag _______ of the weld.
ahead
The exact weave pattern for each weld is often the _______ of the welder.
personal choice
Hard spatter is spatter that fuses to the metal surface and cannot just be _______.
wiped off
In metal fabrication, the assembling step corresponds to the process of _______.
permanently attaching the parts together to form the finished part
The two most popular thermal cutting processes are oxyacetylene cutting (OAW) and _______.
plasma arc cutting (PAC)
Combinations of oxygen and fuel gases (oxyfuel gas [OF]) can be used for welding such as hydrogen, Mapp, or _______.
Propane
Tack welders often help the welder _______.
by making small welds to hold parts in place
A fire extinguisher works by breaking the fire triangle of heat, fuel, and _______.
Oxygen
In addition to straight welding, welders are often required to assemble parts together to form a _______.
weldment
_________ are the welds, usually small in size, that are made during the assembly to hold all of the parts of a weldment together.
Tack welds
_________ are devices that are made to aid in assemblies and fabrication of weldments.
Fixtures
The best way of saving energy when using any welding equipment is to _______.
turn off the machines when they are not being used
What polarity would a welding machine be set to when the work lead is connected to the positive terminal of the welding machine?
DCRP
A(n) _______ joint is made by aligning the edges of two pieces of flat metal together so they are next to each other.
Butt
The _______ of a joint is its ability to withstand being pulled apart.
tensile strength
When welds are made in any position other than the flat position, they are referred to as being _______.
done out-of-position
A fillet weld is designated by a _______.
right triangle
Watts are calculated by multiplying voltage times _______.
amperes
The operating voltage will vary with arc length, type of electrode being used, type of current, and _______.
shielding gas
Engine-powered generators are widely used for _______.
portable welding
Inverter welding machines are much smaller than other types of machines of the same _______ range.
amperage
It is possible for alternators and generators to both use _______ to change the AC to DC for welding.
diodes
The duty cycle is the percentage of time a welding machine can be used _______.
continuously
Electrodes with the rutile-based fluxes are easier to control and are used for fillet, stringer beads, and _______.
lap joints
The selection of the correct size of welding electrode for a weld is determined by the skill of the welder, the thickness of the metal to be welded, and the _______.
type of fuel gas used
The electrode angle is measured from the electrode to the surface of the _______.
joint
All welds start with a(n) _______.
arc strike
A lot of practice is required to develop the speed and skill needed to prevent _______.
the electrode from sticking to the plate
_________ are a temporary method of holding parts in place until they can be completely welded.
Tack welds
A(n) _______ is made by placing the plates at an angle to each other.
tee joint
A(n) _______ is made by overlapping the edges of the two plates.
lap joint
Both GMA and FCA welding are classified as _______.
semiautomatic processes
The symbol for a type D extinguisher is a _______ with the letter D in the center.
yellow star
Which of the following machines transforms AC to DC?
transformer rectifier
According to the AWS, which number indicates the positions a 7024 can be used in?
second number
Which electrode is considered a low hydrogen coating?
E7018
