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CWB WELDING INSPECTOR LEVEL 2 EXAM WITH ACTUAL CORRECT QUESTIONS AND VERIFIED DETAILED ANSWERS |FREQUENTLY TESTED QUESTIONS AND SOLUTIONS |ALREADY GRADED A+|BRAND NEW VERSION!!! |GUARANTEED PASS|LATEST UPDATE$21.49
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CWB WELDING INSPECTOR LEVEL 2 EXAM
2024-2025 WITH ACTUAL CORRECT
QUESTIONS AND VERIFIED DETAILED
ANSWERS |FREQUENTLY TESTED
QUESTIONS AND SOLUTIONS |ALREADY
GRADED A+|BRAND NEW VERSION!!!
|GUARANTEED PASS|LATEST UPDATE
A welding arc is formed when ___ ___ is forced to flow across a gap between two electrodes at a
relatively low voltage
high current
power sources can be classified as constant current, constant voltage or _____
both
thee volt-ampere curve of a constant current pwoer source is described as _____
drooping
In any arc welding setup, there is a continuous drop in ____ from the lower-most point of the contact
between the contact tip and the wire, to the molten weld pool or workpiece
voltage
There is a jet-like flow of ___ ___ in the arc column which gives it some stiffness and force. Allow the
welder to manipulate and direct molten metal at the desired location
ionized gases
___ ___ is a critical and controllable parameter, which is directly related to the arc voltage
Arc length
Arc blow is likely to cause what type of weld flaws?
incomplete fusion
1|Page
,Since pinch force on the electrode increase with the square of the current, smaller and smaller droplets
are detached as ____ increases
current
_____ ______ can have a significant effect on the shape of the weld bead and depth of penetration
Electrode polarity
In GTAW, DCEN welding, ____ percent of the heat is directed to where the arc meets the workpiece
70
In GTAW, DCEP welding, 70 percent of the heat is directed via current flow to where the arc meets the
____
Electrode
In GTAW setup up for DCEN, what term best describe the tungsten electrode in the welding circuit?
Cathode
When polarity is reversed (DCEP) the _____ becomes the cathode
workpiece
The weld pool cannot easily emit electrons because the molten weld pool is at a much lower ______
than the tungsten and will resist the release of electrons
Temperature
GTAW setup for DCEN produces welds with penetration that can be described as what?
Deep and narrow
GTAW setup for DCEP produces welds with penetration that can be described as what?
shallow and wide
GTAW setup for AC produces welds with penetration that can be described as what compared to
DCEP/DCEN?
medium
The heat balance of consumable electrode processes as in SMAW differs from that of non-consumable
tungsten arcs. A greater amount of heat is generated at the _____ rather than the ____.
cathode, anode
When using GMAW, ____ is the polarity of choice as it leads to greater heat generation at the workpiece
DCEP
what kind of stainless steel is still susceptible to hydrogen induced cold cracking?
2|Page
,Martensitic
What does HICC stand for?
hydrogen induced cold cracking
What are the two main reasons transformer/rectifier power sources are becoming less than popular
than inverter types?
weight and power consumption
What relatively new welding polarity configuration can achieve reduced heat input and lower distortion
while still achieving good penetration and fusion, and also reliably weld in all positions?
Pulsed DCEN
The delay in re-ignition of the arc caused by switching from DCEN to DCEP, due to the inability for the
weld pool to effectively emit electrons is called?
Partial rectification
_____ wave output power sources were developed to increase arc stability by altering circuitry and
attempt to eliminate the portion of the AC sine wave that was not emitting electrons (partial
rectification)
Square
The amount of the electrode negative wave percentage in an AC wave balance may be as high as ___
___
90 percent
Increasing AC ____ with an inverter power source for GTAW will provide a narrower, more focused arc
frequency
GTAW torches are generally air cooled if they are rated for currents under what amperage?
200 amps
Gas lenses eliminate what in the shielding gas for GTAW
turbulence
name these GTAW torch parts
1
3|Page
, Why must the appropriate tungsten diameter be chosen based on current being used?
Low current causes arc wander, high current causes tungsten contamination
Describe what happens to weld bead characteristics as the included angle of the tungsten elctroe vertex
increases
Penetration increases and bead width decreases
Argon hydrogen blend shielding gases are sometime used with what alloys?
austenitic stainless steel, copper-nickel alloys, nickel base alloys
What process is commonly is used in the repair and maintenance of tool and die steels, aluminum and
magnesium alloys and other critical components?
GTAW
How should a joint design be confirmed as optimal?
Procedure qualification tests
What is the purpose of joint design?
to transfer the stresses between various parts of the welded section
What are the 3 ways to initiate a GTAW arc?
Scratch start, high frequency, lift start
what is the ideal travel angle for most GTAW applications?
5 to 15 degree push
Why should current be slowly ramped down at the end of a GTAW weld while still feeding filler wire?
to avoid craters and eventual cracking
Generally as amperage is increased in SMAW, how is deposition rate affected?
it increases
CSA W59 limits layer thickness in prequalified multipass groove joints to welds to what size in root
passes? And what size for subsequent layers?
6mm, 5mm
CSA W59 limits single fillet weld sizes to what in prequalified joints in the flat, horizontal/overhead, and
vertical positions respectively?
8mm, 10mm, 12mm
Excessive heat input in a single pass of welding may lower what property in the finished product?
notch tougness
4|Page
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