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CWB Inspector Level 2, Chapter 2 with 100- correct answers 2025.
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CWB Inspector Level 2, Chapter 2 with 100- correct answers 2025.
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CWB Inspector Level 2,Chapter 2 with 100% correct
answers 2025
Conductors, insulators, semiconductors and gases
What are the four classifications of materials in regarding their ability to
conduct electricity
Insulators
_____ do not readily conduct electrical current because they do not have
free electrons available.
semiconductor
_______ materials don't conduct electricity easily, but neither are they good
insulators.
Diode
What is a simple example of a semiconductor?
Ionization
the process of stripping electrons from the atoms of a gas
Positive
What kind of charge does an ion have?
Free electrons
What allows current to flow through matter?
Ionization potential
The amount of energy needed in order to take an electron away from an
atom, also called ionization.
Low ionization potential
In metal arc processes, ___ ________ _______ additives are included in fluxes
and coatings to promote arc initiation and improve arc stability.
Increased melting rate
, An increase in current in of any welding process results in what in the
electrode?
u shaped
drive rolls used for aluminum or other soft wires in GMAW
V shaped
Drive rolls used for carbon and stainless steels in GMAW
Background amperage
The baseline level of current set to maintain the arc during low side of a
pulse pattern
ohm's law
V=IR
voltage drop
Increasing tip-to-work distance in GMAW leads to an increase of what in
the the electrode extension, ultimately lowering the actual voltage
available for the arc? (The power source is constant voltage)
increased voltage
With SMAW, an increase in the manually manipulated arc length leads to
what change in the welding circuit? (The power source is constant current)
Ballast resistance
When a resistance is added to a circuit to create a drooping characteristic,
it is sometimes called a ____ _____.
short enough for good heat concentration, not so short as to short circuit
Optimal arc length
engine driven DC generator
These are the advantages of what type of power source?
-Smooth DC rippled output
- Voltage droop can be controlled
- Portable
Transformer
What type of power source is deigned to increase or decrease voltage?
(Step up/step down)
DC generator, rotating field alternator, brushless alternator
What are the 3 types of engine driven power source
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