Weld 322 Midterm Study Guide With complete
solu on| Rated A+ | NEW | 2026
_______________ localizes the welds at predetermined points by using projec ons,
embossments or intersec ons, all of which focus heat genera on at the point of contact.
Projec on welding
_______________ uses wheel-shaped electrodes to deliver force and welding current to the
workpieces.
Seam welding
_______________ is necessary to allow the weld nugget to solidify before releasing the welded
parts.
Hold me
Resistance welding electrodes are typically manufactured from _______________ based alloys
due to superior conduc ve proper es.
Copper
The two basic laws of physics involved in resistance welding are?
1. Joule's Law
2. Ohm's Law
Force is applied before current in _______________. (Flash or Upset Welding)
Upset Welding
A _______________ consists of two coils of wire, called the primary and secondary, wound
around an iron core.
Transformer
The heat energy needed to change a liquid to a gas is the:
Latent Heat of Vaporiza on
A _______________ is the only way to accurately measure actual electrode force at the weld.
Force gauge
, In a basic _______________, the two workpieces to be welded are first brought together under
pressure. Current is then applied, hea ng the contact area enough to allow the applied pressure
to forge the parts together. (Flash or Upset Bu8 weld)
Upset Bu8 Weld
Consider Joule's Law. What happens when R is increased by 25%?
H increase by 25%
Consider Joule's Law. What happens when T is increased by 25%?
H increase by 25%
Consider Joule's Law. What happens when I is increased by 25%?
H increase by 50%
If current is the amount of electricity flowing, then _______________ is the pressure or force
that's causing the flow.
Voltage
In resistance welding, weld current is usually measured in _________________.
Kilo-Amperes
Consider Joule's Law (H = I2RT); what impact does reducing T ( me) by half have on H (heat
energy)?
Reduce by 1/2
As electrode force decreases, the resistance of the workpiece circuit will _______________.
Increase
_______________ is voltage mul plied by current, and is measured in wa8s, or KVA (Kilo-Volt-
Amperes).
Power
_______________ describes how much current is being delivered to a specific area.
Current density
Consider Joule's Law (H = I^2RT); what variables can the weld control regulate?
I (current) and T ( me)
solu on| Rated A+ | NEW | 2026
_______________ localizes the welds at predetermined points by using projec ons,
embossments or intersec ons, all of which focus heat genera on at the point of contact.
Projec on welding
_______________ uses wheel-shaped electrodes to deliver force and welding current to the
workpieces.
Seam welding
_______________ is necessary to allow the weld nugget to solidify before releasing the welded
parts.
Hold me
Resistance welding electrodes are typically manufactured from _______________ based alloys
due to superior conduc ve proper es.
Copper
The two basic laws of physics involved in resistance welding are?
1. Joule's Law
2. Ohm's Law
Force is applied before current in _______________. (Flash or Upset Welding)
Upset Welding
A _______________ consists of two coils of wire, called the primary and secondary, wound
around an iron core.
Transformer
The heat energy needed to change a liquid to a gas is the:
Latent Heat of Vaporiza on
A _______________ is the only way to accurately measure actual electrode force at the weld.
Force gauge
, In a basic _______________, the two workpieces to be welded are first brought together under
pressure. Current is then applied, hea ng the contact area enough to allow the applied pressure
to forge the parts together. (Flash or Upset Bu8 weld)
Upset Bu8 Weld
Consider Joule's Law. What happens when R is increased by 25%?
H increase by 25%
Consider Joule's Law. What happens when T is increased by 25%?
H increase by 25%
Consider Joule's Law. What happens when I is increased by 25%?
H increase by 50%
If current is the amount of electricity flowing, then _______________ is the pressure or force
that's causing the flow.
Voltage
In resistance welding, weld current is usually measured in _________________.
Kilo-Amperes
Consider Joule's Law (H = I2RT); what impact does reducing T ( me) by half have on H (heat
energy)?
Reduce by 1/2
As electrode force decreases, the resistance of the workpiece circuit will _______________.
Increase
_______________ is voltage mul plied by current, and is measured in wa8s, or KVA (Kilo-Volt-
Amperes).
Power
_______________ describes how much current is being delivered to a specific area.
Current density
Consider Joule's Law (H = I^2RT); what variables can the weld control regulate?
I (current) and T ( me)
