CWB 2 Visual Welding Inspector Exam New 2025
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Questions and Correct Answer
Process that are not hydrogen controlled may require ----------- Correct Answer ------------ Higher
preheat temperatures for thicker plates
What joints provide the most dilution ----------- Correct Answer ------------ The square groove
weld with zero root opening
If a camber diagram is specified it is necessary to check camber at one point only -----------
Correct Answer ------------ False
The maximum combined warpage and tilt of a flange allowed by CSA W59 is ----------- Correct
Answer ------------ 1/100 x flange width , 6 mm maximum
For a deep girder where the web may not be flat, is a simplest tee square the best tool to use for
measuring flange warpage and tilt ----------- Correct Answer ------------ No
When measuring web flatness, what length straight edge should be used ----------- Correct
Answer ------------ The depth of the web
what electrode type is often required if stress relieving operation are planned on the fabricated
structure to maintain the same yield strength and tensile strength ----------- Correct Answer -------
----- Molybdenum-bearing electrodes
The type of microstructure and susceptibility to cracking of a heat affected zone depends on -----
------ Correct Answer ------------ Hardenability of the steel and the weld cooling rate
The level of preheat required is typically derived from the ----------- Correct Answer ------------
plate thickness and the carbon content of the steel
Submerged arc welding has a process efficiency of ----------- Correct Answer ------------ 90% to
99%
Covered electrodes that use basic coatings ----------- Correct Answer ------------ Reduce
electrodes that use basic coatings
The extent to which grain growth in HAZ occurs depends on ----------- Correct Answer -----------
- The energy input
For given set of welding parameters, an increase in travel speed will ----------- Correct Answer --
---------- Decrease the heat input
,Why is it possible for some multipass welds to have higher toughness than a single pass weld ----
------- Correct Answer ------------ The passes in the multipass weld refine the underlying grain
structure
The amount of dilution of weld metal by the parent metal ----------- Correct Answer ------------ is
mostly dependent on the joint design and welding process
Restraint is usually higher in ----------- Correct Answer ------------ Groove welds than in fillet
welds
The G-BOP test is suitable to study crack susceptibility relating to ----------- Correct Answer -----
------- Hydrogen -cracking in the heat affected zone
What is the heat input efficiency of the SMAW process ----------- Correct Answer ------------ 50 -
85
In some steels a very slow cooling rate may procedure a ----------- Correct Answer ------------
soft, coarse grain structure with low toughness
Sometimes an unwanted microstructure can be refined and altered by reheating ----------- Correct
Answer ------------ Into normalizing range, where it will re-crystalize and transform back into
small austenite grains
Hydrogen entrapped in the solidified weld metal ----------- Correct Answer ------------ Can not
escape into the atmosphere before it causes cracking
According to CSA W59, the SAW process can be used without preheat if adequate energy input
is ensured. This is applicable when making ----------- Correct Answer ------------ Fillet welds in
one pass
When welding alloyed structural steels the risk of cracking depends mainly on ----------- Correct
Answer ------------ chromium and nickel content
When weldling structural steels the main reason for preheating is ----------- Correct Answer ------
------ to allow hydrogen to escape
Crack can form in the parent material beneath the weld. This form of cracking is called -----------
Correct Answer ------------ Lamellar tearing
Good fracture toughness normally requires ----------- Correct Answer ------------ A fine grain
structure
The solidification structure that results from a slow welding speed can be described as -----------
Correct Answer ------------ A short weld pool with solidifying crystals growing from the back of
the pool
,Beyond a certain thickness the cooling rate is independent of thickness. At about what thickness
does this occur in carbon manganese steels ----------- Correct Answer ------------ 38mm (1-1/2")
Steels can be grouped into three zones based on their carbon content and carbon equivalent. The
HAZ hardness of which group of steels can be controlled by cooling rate ----------- Correct
Answer ------------ Zone 2
In general, the higher the heat input ----------- Correct Answer ------------ The slower the weld
cooling rate
Steels can be grouped into three zones based on their carbon content and carbon equivalent.
Steels in which Zone are not prone to hydrogen cracking ----------- Correct Answer ------------
Zone 1
Heat input from welding ----------- Correct Answer ------------ determines the amount of
component distortion during phase transformations
Hydrogen cracking in carbon manganese steels ----------- Correct Answer ------------ Can occur in
many areas of the welds
An Arc of 300 amps and 30 volts will produce ----------- Correct Answer ------------ 9000 joules
per second (300 x 30)
The peak temperature within the heat affected zone changes with distance from the fusion line.
What peak temperature is exceeded in partially transformed region ----------- Correct Answer ----
-------- 723
According to CSA W59, a damaged container of low alloy SMAW electrodes must be -----------
Correct Answer ------------ re-baked at temperatures between 230 C and 260 C
During arc welding there is a zone adjacent to the weld metal that reaches high temperatures but
does not melt. What is the name of this region ----------- Correct Answer ------------ Heat affected
zone
Not all the heat energy produced during welding will enter the plate as heat energy. What is this
phenomenon known as ----------- Correct Answer ------------ the efficiency
With Manual welding the technique will influence the energy input. Which technique involves
higher energy input ----------- Correct Answer ------------ Weaving techniques
Considering that increasing the heat input will reduce the cooling rate, is the following statement
true or false: ----------- Correct Answer ------------ For thick plates, cooling rate is inversely
proportional to the heat input
The metallurgical changes that occur in the HAZ will be dependent on the peak ----------- Correct
Answer ------------ The peak temperature reached
, Regions that are close to the fusion boundary can experience temperatures sufficiently high
enough that growth of the (Blank) occurs ----------- Correct Answer ------------ Austenitic Grain
one feature of hydrogen cracking is that it only occurs when the weld and heat affected zone are
at high temperatures ----------- Correct Answer ------------ FALSE
Welding over a gap in backing bar of a complete penetration groove weld may result in a
transverse crack in the weld metal ----------- Correct Answer ------------ TRUE
in the heat affected zone of a weld in carbon steel, fast cooling rates will form a hard -----------
Correct Answer ------------ Martensite Structure
Which of the following types of steel is least susceptible to hydrogen cracking in normal
circumstances ----------- Correct Answer ------------ Low strength, low hardness steels
The carbon equivalent formula available in CSA W59 in one of several possible formulas
available ----------- Correct Answer ------------ TRUE
Which crack susceptibility test uses plates of different thickness to change the cooling rate -------
---- Correct Answer ------------ Controlled thermal severity
Solidified weld metal will have a microstructure the same as that of the parent material (Plate) ---
-------- Correct Answer ------------ FALSE
The proportion of parent material melted into the weld is known as the ----------- Correct Answer
------------ Dilution
Arc fluxes that do not easily transfer oxygen to the metal are referred to as what type of flux -----
------ Correct Answer ------------ Basic Flux
What effect does the presence of large quantities of oxides have on the charpy V-notch impact
energy ----------- Correct Answer ------------ It is likely to be lower
What type of weld pool does high speed welding procedure ----------- Correct Answer ------------
A long weld pool
Centerline solidification cracking is most likely caused by welding speed that is too -----------
Correct Answer ------------ High
When a carbon steel weldment is stress relieved at 625 C are there any major changes in the
microstructure ----------- Correct Answer ------------ No
The rate of energy consumption at which an electric lamp converts electrical energy into heat ----
------- Correct Answer ------------ Volts x Amperage
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