UTI FINAL STUDY 2 QUESTIONS WITH COMPLETE SOLUTIONS!!
English Man Wilde - (answer)After the discovery of the arc, the first person known to intentionally join
metals by electric welding was an english man named Wilde.
Types of welding power sources 1 - (answer)Transformer
Types of welding power sources 2 - (answer)Inverter
Types of welding power sources 3 - (answer)Engine driven welding
Types of welding power sources 4 - (answer)In SMAW welding, transformer welders are still commonly
used.
Constant Current Power Source/Constant Potential - (answer)Operates "opposite" when compared to
the constant current power source.
Constant Current Power Source/Constant Potential 2 - (answer)The amperage will vary as conditions
such as arc length change.
Constant Current Power Source/Constant Potential 3 - (answer)Constant voltage power sources are
used for gas metal arc welding (GMAW) and flux-core arc welding (FCAW) processes.
Others - (answer)Welding power sources are also classified based upon how they generate the output
current. There are three basic classifications presented in this lesson.
Others 2 - (answer)Transformer/Others
Others 3 - (answer)Generator/Others
Others 4 - (answer)Inverter/Others
, UTI FINAL STUDY 2 QUESTIONS WITH COMPLETE SOLUTIONS!!
NEMA Class 1 Machines - (answer)Deliver rated outputs of 60%, 80% or 100% duty cycles.
NEMA Class 1 Machines 2 - (answer)These machines can be operated at full load welding currents for
60%, 80% or even 100% of total time and not cause damage to the machine from overheating.
NEMA Class 1 Machines 3 - (answer)These "heavy-duty industrial" power sources are used for many
hours in industrial settings where welding is done full time. An example is the Flextec 450 or Power MIG
S300.
Cable sizes - (answer)After 4/0 cables sizes are expressed as the number of circular mils, a 250 kcml
cable is the next larger cable after a 4/0.
Troubleshooting - (answer)Both the input and the output power should be considered. Even though you
have correctly sized the welding leads, there may be a problem between the circuit breaker and the
welder.
Inherit Sheilding Gases - (answer)Helium/Argon blends are commonly used for welding aluminum
greater than 1 in. (25mm) thick.
Welding Amperage - (answer)The higher the amperage, current flow, the greater the amount of heat
that will be generated.
In Wire Welding Processes - (answer)Such as Gas Metal Arc Welding (GMAW) and Flux Cored Arc
Welding (FCAW), which require constant voltage (CV) power sources, the amperage is a correlation
between wire feed speed (WFS), the contact to work distance and the diameter of the electrode.
Arc Length - (answer)By changing the arc length, you are changing the electrical resistance of the
electron flow, therefore changing the voltage and amperage of the welding electrical output.
Corner joint - (answer)A type of joint between two metal parts located at right angles to one another.
English Man Wilde - (answer)After the discovery of the arc, the first person known to intentionally join
metals by electric welding was an english man named Wilde.
Types of welding power sources 1 - (answer)Transformer
Types of welding power sources 2 - (answer)Inverter
Types of welding power sources 3 - (answer)Engine driven welding
Types of welding power sources 4 - (answer)In SMAW welding, transformer welders are still commonly
used.
Constant Current Power Source/Constant Potential - (answer)Operates "opposite" when compared to
the constant current power source.
Constant Current Power Source/Constant Potential 2 - (answer)The amperage will vary as conditions
such as arc length change.
Constant Current Power Source/Constant Potential 3 - (answer)Constant voltage power sources are
used for gas metal arc welding (GMAW) and flux-core arc welding (FCAW) processes.
Others - (answer)Welding power sources are also classified based upon how they generate the output
current. There are three basic classifications presented in this lesson.
Others 2 - (answer)Transformer/Others
Others 3 - (answer)Generator/Others
Others 4 - (answer)Inverter/Others
, UTI FINAL STUDY 2 QUESTIONS WITH COMPLETE SOLUTIONS!!
NEMA Class 1 Machines - (answer)Deliver rated outputs of 60%, 80% or 100% duty cycles.
NEMA Class 1 Machines 2 - (answer)These machines can be operated at full load welding currents for
60%, 80% or even 100% of total time and not cause damage to the machine from overheating.
NEMA Class 1 Machines 3 - (answer)These "heavy-duty industrial" power sources are used for many
hours in industrial settings where welding is done full time. An example is the Flextec 450 or Power MIG
S300.
Cable sizes - (answer)After 4/0 cables sizes are expressed as the number of circular mils, a 250 kcml
cable is the next larger cable after a 4/0.
Troubleshooting - (answer)Both the input and the output power should be considered. Even though you
have correctly sized the welding leads, there may be a problem between the circuit breaker and the
welder.
Inherit Sheilding Gases - (answer)Helium/Argon blends are commonly used for welding aluminum
greater than 1 in. (25mm) thick.
Welding Amperage - (answer)The higher the amperage, current flow, the greater the amount of heat
that will be generated.
In Wire Welding Processes - (answer)Such as Gas Metal Arc Welding (GMAW) and Flux Cored Arc
Welding (FCAW), which require constant voltage (CV) power sources, the amperage is a correlation
between wire feed speed (WFS), the contact to work distance and the diameter of the electrode.
Arc Length - (answer)By changing the arc length, you are changing the electrical resistance of the
electron flow, therefore changing the voltage and amperage of the welding electrical output.
Corner joint - (answer)A type of joint between two metal parts located at right angles to one another.
