CURRENTLY TESTING SOLUTIONS OF CWB Welding Inspector
Level 2, Chapter 1 EXAM QUETSIONS WITH ACTUAL CORRECT
DETAILED ANSWERS
A welding process in which an atomic bond between two surfaces is produce through the application of
pressure and heat
Diffusion welding
In continuously fed wire welding processes, wire feed speed is directly proportional to ____ ____. An
increase in WFS results in an increase in ____ ___ and penetration.
welding current
______ is the sum of the arc voltage and the voltage drop in the remaining parts of the electrical circuit.
Output voltage
A substance with metallic properties and composed of two or more chemical elements of which at least
one is a metal.
Alloy
A considerable amount of ______ can be produced by the flow of electrical current in a circuit.
Heat
_____ usually don't conduct electricity unless sufficient energy is applied.
Gases
The ionized gas region between energized electrodes is called a ______.
Plasma
A welding arc is intensely hot, with temperatures that can exceed _______ °C
30000
The fraction of the overall energy that is available to melt the electrode/filler metal and the workpiece is
termed the _____
Arc efficiency
,The distance from the tip of the welding electrode to the adjacent surface of the weld pool.
Arc Length
_____ flow from negative (cathode) to positive (anode) in a circuit.
electrons
Electrons have a ________ charge.
negative
The electrical potential (Voltage) observed between the electrode and the workpiece.
Arc Voltage
Electrons flowing through a conductor produce a _____ around the conductor
Magnetic field
The deflection of an arc from its normal path due to magnetic forces
Arc blow
Current flow in an electrical circuit where its direction (and therefore direction of electron flow)
continually reverses itself, usually at a predetermined frequency.
Alternating current
The positive half and negative half of the AC together represent one complete cycle of alternating
current. This can be visualized as a ____
sine wave
what is the most common type of laser found in consumer and commercial products, but not used as
extensively in welding?
semiconductor
Most common electrode configuration for SMAW
DCEP
Most common electrode configuration for GTAW
DCEN
when using the gas metal arc process, ____ is the polarity of choice as it leads to greater heat generation
at the workpiece (cathode) and therefore greater penetration.
DCEP
The _____ cycle of an AC sine wave provides cleaning action to the welding arc
DCEP
, The direct current, constant potential power sources used for gas metal arc welding (GMAW) can be
____, ____/_____ or _____. The latter two types are more common since the generator-type supplies
respond slowly to changing arc conditions.
generator, transformer/rectifiers, inverters
The mating surface of a member that is in contact with or in close proximity to another member to
which it is to be joined.
faying surface
a process in which faying surfaces*, held together under force, are joined in one or more spots by the
heat generated due to the resistance to the flow of electric current through the workpieces.
Resistance welding
abbreviation of the resistance spot welding process
RSW
Resistance projection welding abbreviation
RPW
Resistance seam welding abbreviation
RSEW
Flash welding abbreviation
FW
Upset welding abbreviation
UW
Percussion welding abbreviation
PEW
Plasma arc welding abbreviation
PAW
Modes of transfer in Plasma Arc Welding
melt-in mode, keyhole mode
Current mode used with keyhole mode in PAW
Keyhole plasma
Current modes used with melt-in mode in PAW
micro-plasma, medium current plasma
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