CWB Welding Inspector Level 2 Exam Prep (Latest 2023/ 2024 Update) Questions and Verified Answers| All Modules Covered| 100% Correct| Grade A
CWB Welding Inspector Level 2 Exam Prep
(Latest 2023/ 2024 Update) Questions and
Verified Answers| All Modules Covered|
100% Correct| Grade A
Q: In an isometric drawing, the lines (for width, length and depth) are inclined at an angle of
how many degrees?
Answer:
30°
Q: What are the maximum number of views in an orthographic drawing?
Answer:
6
Q: What are the two general classes of picture drawings?
Answer:
Perspective and Isometric
Q: What are the 5 basic joints?
Answer:
1) Butt
2) Corner
3) T
4) Lap
5) Edge
Q: What are the 5 basic weld types?
Answer:
1) Groove
2) Fillet
3) Plug/Slot
4) Surfacing
5) Edge
Q: Plasma cutting torch temp can reach temperatures of __ ° Celsius.
Answer:
30,000
Q: True or False: All plasma arc cutting equipment is operated using DCEN.
Answer:
True
Q: True or False: Stainless steel can be readily cut with a normal oxy-fuel gas process.
Answer:
False
Q: What are the two basic methods of plasma torch operation?
Answer:
Transferred and Non-Transferred arc
Q: In North America, the 3 othographic views most commonly-used are: TOP, FRONT and
__ Side.
[RIGHT / LEFT]
Answer:
LEFT
Q: What is the difference between a “weld symbol” and a “welding symbol”?
Answer:
A “weld symbol” indicates the specific kind of weld to be used (ex. fillet), and is contained
inside of “welding symbol”.
Q: In a welding symbol, is the size of the weld located to the LEFT or RIGHT of the fillet weld
symbol?
Answer:
LEFT
Q: In a welding symbol, is the length of the weld located to the LEFT or RIGHT of the fillet
weld symbol?
Answer:
RIGHT
Q: In what direction do the electrons flow in an electrical arc?
(A) anode –> cathode
(B) cathode –> anode
Answer:
(B) cathode –> anode
Q: In arc welding, the arc temperature can exceed temperatures of _ ° Celsius?
Answer:
30,000
Q: Which welding process has the highest arc efficiency?
Answer:
SAW
Q: Arc voltage _ when arc length is increased.
[Increased / Decreased]
Answer:
Increases
Q: In GTAW, what type of penetration and weld width can be expected when using DCEP?
Answer:
Shallow penetration, and wide weld
Q: Which polarity is most often chosen for direct current GTAW welding of steels and why?
Answer:
DCEN. More heat concentrated at the workpiece –> deeper penetration
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What is the term used to describe the following condition of lost corrosion resistance?
“When certain stainless steels are heated between 500-850° C, carbides form at the grain boundaries and cause a local depletion of chromium.”
(A) Oxidization
(B) Increased toughness
(C) Solution heat treatment
(D) Sensitization
(D) Sensitization
Note: Also known as “carbide precipitation” — Chromium binds to carbides, and “sweats out” at the grain boundaries
On a radiograph, undercut appears as a _ line.
(A) light
(B) dark
(B) dark
What is the Canadian Standard for safety in welding?
CSA W117.2
What is the typical three-phase input voltage in most Canadian welding shops?
600V
True or False: The cable from the workpiece back to the welding machine is called the “ground lead”.
False. The correct term is the “work lead”.
What is the type of radiation that can damage living cells?
Ionizing
Name two examples of ionizing radiation.
X-rays and Gamma rays
What is the minimum suggested shade for a welding helmet when using 5/32 SMAW electrode at 150 A?
Shade 10
Approx. how far could spatter travel when welding/cutting from 2.5m high?
Possibly up to 6m
What is the toxic component contained in some copper alloys?
Beryllium
Which welding process will likely have the highest fume generation rate?
[SMAW / SAW / FCAW]
FCAW
What do the terms TLV and TWA stand for?
TLV: Threshold limit value
TWA: Time weighted average
Is helium lighter or heavier than air?
Lighter
The action of UV light on oxygen produces which toxic gas?
Ozone
Which common fuel gas has the widest range where it can become flammable when mixed with air?
Acetylene
What substance should you NEVER apply to a stiff pressure-adjusting screw on an oxygen regulator?
Oil or grease
What is the maximum gauge pressure that acetylene should be used? (kPa/psi)
103 kPa (15 psi)
Which toxic gas is produced when welding on surfaces with chlorinated hydrocarbon solvents?
Phosgene gas
What is the typical max. OCV of an AC welding machine?
80 V
In an isometric drawing, the lines (for width, length and depth) are inclined at an angle of how many degrees?
30°
What are the maximum number of views in an orthographic drawing?
6
What are the two general classes of picture drawings?
Perspective and Isometric
What are the 5 basic joints?
1) Butt
2) Corner
3) T
4) Lap
5) Edge
What are the 5 basic weld types?
1) Groove
2) Fillet
3) Plug/Slot
4) Surfacing
5) Edge
Plasma cutting torch temp can reach temperatures of __ ° Celsius.
30,000
True or False: All plasma arc cutting equipment is operated using DCEN.
True
True or False: Stainless steel can be readily cut with a normal oxy-fuel gas process.
False
What are the two basic methods of plasma torch operation?
Transferred and Non-Transferred arc
In North America, the 3 othographic views most commonly-used are: TOP, FRONT and __ Side.
[RIGHT / LEFT]
LEFT
What is the difference between a “weld symbol” and a “welding symbol”?
A “weld symbol” indicates the specific kind of weld to be used (ex. fillet), and is contained inside of “welding symbol”.
In a welding symbol, is the size of the weld located to the LEFT or RIGHT of the fillet weld symbol?
LEFT
In a welding symbol, is the length of the weld located to the LEFT or RIGHT of the fillet weld symbol?
RIGHT
In what direction do the electrons flow in an electrical arc?
(A) anode –> cathode
(B) cathode –> anode
(B) cathode –> anode
In arc welding, the arc temperature can exceed temperatures of __ ° Celsius?
30,000
Which welding process has the highest arc efficiency?
SAW
Arc voltage __ when arc length is increased.
[Increased / Decreased]
Increases
In GTAW, what type of penetration and weld width can be expected when using DCEP?
Shallow penetration, and wide weld
Which polarity is most often chosen for direct current GTAW welding of steels and why?
DCEN. More heat concentrated at the workpiece –> deeper penetration
Does SMAW use CC or CV?
CC
For out-of-position welding, would you select a small or large diameter electrode?
A small diameter electrode
Does GMAW use CC or CV?
CV
What happens to the SAW weld when you switch from DCEP to DCEN?
Increased deposition rate, but less penetration
What is the temperature for storing low-hydrogen electrodes?
120° Celsius
When using a consumable electrode in DCEN, the majority of the heat is concentrated on the __.
(A) Electrode
(B) Workpiece
(A) Electrode
When using a non-consumable electrode in DCEN, the majority of the heat is concentrated on the __.
(A) Electrode
(B) Workpiece
(B) Workpiece
Which has a “drooping” curve characteristic – CC or CV?
CC
AC transformer welding power sources use a:
(A) step-up transformer
(B) step-down transformer
(B) Step-down transformer
What is a diode used for in a welding machine?
(A) To produce AC current
(B) To produce DC current
(B) To produce DC current
The typical duty cycle for a Class 1 industrial welding power source is:
(A) 20%
(B) 35%
(C) 60%
(D) 150%
(C) 60%
What current/polarity is used when welding aluminum with GTAW?
(A) DCEN
(B) DCEP
(C) AC
(C) AC
True or False: a welding cable size designation “No. 4” is larger than a “No. 2”.
False.
Cable sizes (smallest-to-largest) are:
4 – 3 – 2 – 1 – 1/0 – 2/0 – 3/0 – 4/0
To increase the melting rate (burn-off rate) of a SMAW electrode, which polarity would you use?
DCEN
Is it possible to operate a wire-feed welding process using constant current?
Yes – but you must use a voltage-sensing wire-feeder to obtain a self-regulating arc.
A transformer is a device that:
(A) transforms AC to DC
(B) transforms DC to AC
(C) changes the value of AC
(C) changes the value of AC
A rectifier is a device that:
(A) transforms AC to DC
(B) transforms DC to AC
(C) changes the value of AC
(A) transforms AC to DC
I = V/R and V = IR
are examples of what law?
Ohm’s Law
In Ohm’s Law (I = V/R), what do each of the letters mean?
I = Current (in amps)
R = Resistance (in ohms)
V = Voltage (in volts)
What benefit to the weld deposit does cellulose provide in a SMAW electrode coating?
Improves ductility
The impact toughness of the weld deposit for the
B-G 49A 3C G6 (ER49S-6) electrode is:
(A) not specified
(B) 27 J at 0 degrees Celsius
(C) 27 J at -30 degrees Celsius
(D) 27 J at -6 degrees Celsius
(C) 27 J at -30° Celsius
The result of increased nitrogen content in the final weld deposit will be:
(A) cracking
(B) undercut
(C) poor bead appearance
(D) porosity
(D) porosity
The following electrode is NOT gas-shielded:
(A) E491T-1
(B) E492C-3
(C) E492T-3
(D) E492T-5
(C) E492T-3
According to AWS, a brown tungsten electrode will be composed of tungsten and which alloying ingredient?
(A) zirconium oxide
(B) thorium oxide
(C) cerium oxide
(A) zirconium oxide
The tensile value of an electrode designation is typically designated by CSA in __.
(A) kPa
(B) MPa
(C) psi
(B) MPa
What temperature does CSA W59 require low-hydrogen electrodes to be held at?
120° Celsius
What does the suffix “-1” attached to electrode designations E4918 and E4924 indicate?
Improved impact properties
Which of the following SAW fluxes may be gathered and re-used?
(A) Fused
(B) Bonded
(A) Fused
What is the green colour tungsten electrode composed of?
Pure tungsten
What nominal percentage of thorium oxide does a red colour tungsten electrode contain?
2%
True or False: Weld metal shrinkage is proportional to the amount of weld metal.
True
In an assembly with both groove and fillet welds, which should be welded first?
Groove welds
The contraction effects in weld metal that are of greater magnitude, and therefore more serious are:
(A) longitudinal
(B) transverse
(B) transverse
What is the max temperature for heat straightening or forming of low-alloy steels?
650° Celsius
What is “taconite”?
Iron ore
In a basic oxygen furnace, what does the term “basic” refer to?
(A) the chemical nature of the molten steel
(B) the chemical nature of the refractory lining of the furnace
(C) the chemical nature of the oxygen
(B) the chemical nature of the refractory lining of the furnace
True or False: Metals have a crystalline structure in which atoms are arranged in an irregular pattern.
False
Ferrite, austenite and cementite are known as:
(A) particles
(B) elements
(C) phases
(C) phases
Which is harder – martensite or fine pearlite?
Martensite
The terms “rimmed”, “semi-killed” and “killed” steel refer to the degree of __.
(A) Quality
(B) Weldability
(C) Deoxidation
(C) Deoxidation
Alloys are mixtures of metals with __.
(A) only other metals
(B) only other non-metals
(C) both metals and non-metals
(C) both metals and non-metals
Which of the following classes of steel has NO deoxidants added during production?
(A) Rimmed
(B) Semi-killed
(C) Killed
(A) Rimmed
Which of the following classes of steel is fully-deoxidized and has a large shrinkage cavity or “pipe” at the top?
(A) Rimmed
(B) Semi-killed
(C) Killed
(C) Killed
Which of the following terms describes steel with less than 0.8% carbon content?
(A) Hypoeutectoid
(B) Hypereutectoid
(A) Hypoeutectoid
At what percentage carbon content does steel become cast iron?
1.7%
Below 723° Celsius, what grain structure does steel have?
(A) FCC
(B) BCC
(B) BCC
What is the difference between normalizing and annealing?
Normalizing is air-cooled;
Annealing is furnace-cooled
Which structure is more densely-packed – FCC or BCC?
FCC
Which of the following welding techniques involves higher energy input?
(A) weaving technique
(B) depositing stringer beads
(A) weaving technique
True or False: For thick plates, the cooling rate is inversely proportional to the heat input.
True
A large presence of oxides will have what effect on the Charpy V-notch impact energy?
(A) It is likely to be higher
(B) It is likely to be lower
(B) It is likely to be lower
Centerline solidification cracking is most likely caused by welding speed that is:
(A) too high
(B) too slow
(A) too high
What type of flux does NOT easily transfer oxygen to the weld metal?
(A) Fused
(B) Rutile
(C) Basic
(D) Alkaline
(C) Basic
Does low-carbon steel undergo any major changes to its microstructure when given a stress-relief treatment at 625° Celsius?
No – it would need to reach 723°Celsius
The rate of energy consumption is expressed by:
(A) volts x watts
(B) volts x amps
(C) amps x watts
(B) volts x amps
A “controlled thermal severity” test (CTS) uses which type of weld?
(A) fillet
(B) groove
(A) fillet
Stress relief temperatures for thick sections occur __ the material transformation temperature.
(A) above
(B) below
(C) the same as
(B) below
Another term for weld fault is:
(A) discontinuity
(B) defect
(B) defect
Is an incorrect root opening a dimensional fault or a structural fault?
Dimensional fault
Is overlap a dimensional fault or a structural fault?
Structural fault
in CSA Standard W59 and AWS D1.1, what is the workmanship tolerance for a groove angle?
+10°
-5°
The term “convexity” normally refers to the profile of a __.
(A) fillet weld
(B) groove weld
(A) fillet weld
Solidification cracks are __ in direction.
(A) transverse
(B) longitudinal
(B) longitudinal
Cold cracking forms at temperatures generally below _° C.
100° C
During the generation of X-rays, what percentage of the energy produced (from electron interaction in the material) is in the form of:
Heat: % X-rays: %
Heat: 99%
X-rays: 1%
Which has a longer wavelength?
(A) radiation from Co-60
(B) radiation from Ir-192
(B) radiation from Ir-192
In general, radiographs made with gamma rays are __ to those made with X-rays.
(A) superior
(B) inferior
(B) inferior
In general, construction codes will specify a penetrameter to be __% of the material’s thickness.
2%
When using DC magnetization with MPI, you can detect:
(A) only surface-breaking defects
(B) only sub-surface defects
(C) surface defects and linear near-surface defects
(C) surface defects and linear near-surface defects
What are the two basic types of penetrant dyes?
Visible and Fluorescent
What are the three ways a load can act on a cross-sectional area in a body?
[Hint: Think types/directions of applied stress]
(1) Tension (pulling apart)
(2) Compression (pressing down)
(3) Shear (bending forces)
_ is the load divided by the original cross-sectional area.
(A) Stress
(B) Strain
(A) Stress
__ is the extension divided by the original length.
(A) Stress
(B) Strain
(B) Strain
What device do you place on a specimen to measure the strain during a test?
Extensometer
The three types of guided bend tests are:
Face bends, Root bends, and _.
Side bends
When examining a specimen that has been subjected to a guided bend test, most codes will consider it to be failed if there is a crack or open defect exceeding _____mm in any direction.
3mm
Three types of hardness testing machines are:
Brinell, Rockwell, and __.
Vickers
The tensile strength of a given steel is approximately __ its Brinell hardness number.
(A) 100X
(B) 500X
(C) 1000X
(B) 500X
In hardness testing, it is essential that there is no friction in the loading system or a __ will result.
(A) lighter load
(B) heavier load
(A) lighter load
What is the major load that is used in the Rockwell C Scale?
(A) 100kg
(B) 150kg
(C) 300kg
(B) 150kg
When making a hardness test, the thickness of the specimen should be __ the depth of the impression.
(A) 2X
(B) 5X
(C) 10X
(C) 10X
What is the most common toughness test?
Charpy Impact Test
Unless specified otherwise, it is typical to perform a hydrostatic test at a pressure of __ the maximum working pressure.
(A) 1.3X
(B) 1.5X
(C) 2X
(D) 7X
(B) 1.5X
Non-uniform stress in a rod is calculated by:
(A) load multiplied by cross-sectional area
(B) cross-sectional area divided by the load
(C) load divided by cross-sectional area
(D) cannot be simply calculated
(D) cannot be simply calculated
The yield strength is calculated by __ divided by the cross-sectional area.
(A) the maximum load
(B) the yield point load
(C) the elastic limit
(B) the yield point load
Which of the following hardness testers will be used because it has a small indentation size that makes it suitable for use on regions in a weld (and also for use on thinner samples)?
(A) Brinell
(B) Rockwell
(C) Knoop
(D) Vickers
(D) Vickers
Brittle materials in a toughness test will __.
(A) absorb minimal energy
(B) absorb significant energy
(A) absorb minimal energy
According to CSA W47.1, a Class V Welder is permitted to weld:
(A) vertical position only
(B) all positions
(C) flat, horizontal and vertical positions
(D) vertical and flat positions only
(C) flat, horizontal and vertical positions
A “pipe” is a solidification cavity in steel. Where would you most likely find such a defect when visually inspecting a rolled plate?
(A) on the plate surface
(B) in the middle of an end section
(C) throughout the plate thickness
(B) in the middle of an end section
According to CSA W59, if the leg lengths of a convex fillet weld are unequal, which one determines the weld size?
(A) the smaller leg
(B) the larger leg
(A) the smaller leg
Which dimension is measured to determine the size of a concave fillet weld?
(A) leg
(B) throat
(C) width of weld face x 0.07
(B) throat
At what angle of a T-joint is fillet weld now considered a partial joint penetration groove?
(A) 60°
(B) 45°
(C) 90°
(A) 60°
A specified curvature of a flange in the plane of the web is known as:
(A) camber
(B) sweep
(C) warpage
(D) tilt
(B) sweep
What is the average outside diameter of a cylinder with a taped circumference of 9,425mm?
3,000mm
OD / Pi, or
9,425 / 3.142
Which has a shorter wavelength – X-rays or Gamma rays?
Gamma rays
In an X-ray setup, the tungsten target is embedded in a __ block to conduct the heat away.
(A) Steel
(B) Lead
(C) Aluminum
(D) Copper
(D) Copper
In an X-ray setup, increasing the voltage _ the wavelength.
[Increases / Decreases]
Decreases the wavelength
In an X-ray setup, what voltage potential is needed to inspect 25mm thick steel?
(A) 80 kV
(B) 200 kV
(C) 1000 kV
(B) 200 kV
Which provides a radiograph with better contrast and sensitivity – Xray or Gamma ray?
Xray
Which of the following can be used on all materials (eg. aluminum) – Xray or Gamma ray?
Xray
In radiography, contrast is improved by using __ energy levels.
[Low / High]
Low.
Note: Using lower energy requires a longer exposure time.
On a radiograph, does a tungsten inclusion appear as a light or dark area?
Light
On a radiograph, does a slag inclusion appear as a light or dark area?
Dark
According to Module 18, which side of the specimen should the IQI be placed on?
(A) The source side
(B) The film side
(A) The source side
Note: Unless not physically possible, or when using contact exposure on a pipe weld. MUST REDUCE IQI BY ONE SIZE. See Module 18, Section 3.7
Prior to viewing a radiograph, how long should you allow your eyes to adapt after coming in from full daylight?
(A) 1-2 minutes
(B) 5-10 minutes
(C) at least 30 minutes
(B) 5-10 minutes
On a radiograph, porosity appears as __ spots.
(A) light
(B) dark
(B) dark
On a radiograph, spatter appears as __ spots.
(A) light
(B) dark
(A) light
On a radiograph, excessive joint penetration appears as a _ line.
(A) light
(B) dark
(A) light
What are the minimum number of RT shots required for small-diameter tubing?
(A) 1
(B) 2
(C) 4
(B) 2
Note: Each shot must be done at 90° to each other.
On a radiograph, defects closer to the film side of the weld will appear __.
(A) Fuzzier
(B) Sharper
(B) Sharper
Which organization in Canada controls the use of gamma ray devices?
(A) CNSC
(B) CGSB
(C) Provincial regulatory body
(A) CNSC
Note: Stands for Canadian Nuclear Safety Commission
Which organization in Canada controls the use of x-ray devices?
(A) CNSC
(B) CGSB
(C) Provincial regulatory body
(C) Provincial regulatory body
How many shots would be required to RT a splice weld in a rectangular hollow structural section when there is no access to the inside?
4
In an X-ray setup, increasing the voltage _ the penetrating power.
[Increases / Decreases]
Increases
Which device is now commonly used by RT personnel for measuring their radiation dose?
(A) radiation survey meter
(B) thermo-luminescent dosimeter (TLD)
(C) personal audible alarm
(D) collimator
(B) thermo-luminescent dosimeter (TLD)
Stainless steels are defined as those containing at least _% chromium.
10%
In an iron-chromium alloy, chromium content higher than _% means austenite cannot form.
(A) 8%
(B) 11%
(C) 14%
(D) 28%
14%
Note: An iron-chromium alloy with more than 15% chromium is ferritic.
What kind of crystalline structure does chromium have?
(A) FCC
(B) BCC
(B) BCC
What kind of crystalline structure does nickel have?
(A) FCC
(B) BCC
(A) FCC
True or False:
Increasing the nickel content allows austenite to remain stable at lower temperatures.
True
An iron-nickel alloy is austenitic at room temperature when nickel contents are above _%.
(A) 8%
(B) 11%
(C) 14%
(D) 28%
(D) 28%
Note: The percentage of nickel can be much lower when chromium is added to the mix!
Complete the sentence:
“With 18% chromium, a stainless steel can be austenitic with only _% nickel present”.
(A) 8%
(B) 11%
(C) 14%
(D) 28%
(A) 8%
What is the main alloying element in the AISI 200 series?
(A) chromium
(B) chromium and nickel
(C) manganese
(C) manganese
What is the main alloying element in the AISI 300 series?
(A) chromium
(B) chromium and nickel
(C) manganese
(B) chromium and nickel
Note: Steels in this series are austenitic!
What is the main alloying element in the AISI 400 series?
(A) chromium
(B) chromium and nickel
(C) manganese
(A) chromium
Note: Steels in this series are ferritic or martensitic!
When referring to the 300 series, what does the popular term “18-8 stainless” mean?
18% Chromium, 8% Nickel
The hardness of martensitic stainless steels is determined largely by the __ content.
Carbon
Note: The hardness of martensitic stainless can also be adjusted by the following methods:
1) Adjusting austenitizing temperature
2) Tempering after cooling
3) Heating to above 950° C and quenching
What are the (x5) main categories of stainless steel?
Hint: The first one is “Austenitic”.
1) Austenitic
2) Martensitic
3) Ferritic
4) Duplex
5) Precipitation Hardening
Martensitic and ferritic stainless steels are:
(A) Magnetic
(B) Non-magnetic
(A) Magnetic
Austenitic stainless steels are:
(A) Magnetic
(B) Non-magnetic
(B) Non-magnetic
Which crystalline structure does regular low-carbon steel have at room temperature?
(A) FCC
(B) BCC
(B) BCC
At what temperature does regular low-carbon steel change from BCC to FCC structure?
Hint: It’s “transformational temperature”.
723° C
What is the transformational temperature of pure iron?
Hint: When it changes from BCC to FCC
912° C
Given identical welding parameters, which of the following will result in a 50% larger weld fusion zone?
(A) Carbon steel
(B) Stainless steel
(B) Stainless steel
Note: Less heat is required in stainless steel to produce the same size weld due to its thermal properties
Stainless steel welding is __ to oxygen than carbon steel welding.
(A) Less tolerant
(B) More tolerant
(A) Less tolerant
Note: Too much oxygen or Co2 present during welding will over-oxidize the chromium –> loss of alloying elements and undesirable properties in the completed weld (hence why inert shielding gas is used)
True or False: Sensitization (loss of corrosion resistance) of stainless steel can occur in the HAZ of a weld.
True
Note: This condition can lead to intergranular attack. Stabilizers such as titanium and niobium can be added to stainless steel to help prevent chromium from forming carbides.
Which type of stainless steel does not suffer from hydrogen embrittlement or hydrogen-induced cracking?
Hint: it’s FCC structure is the reason for this
(A) Austenitic
(B) Martensitic
(C) Ferritic
(A) Austenitic
Solidification cracking in stainless (longitudinal crack in the last part of the weld bead) can be caused by the presence of impurities such as __ and phosphorus.
Sulphur
True or False:
The Schaeffler Diagram was produced to group alloying elements as “Austenite stabilizers” and “Ferrite stabilizers”.
True
Austenite stabilizers are nickel equivalents that promote austenite
Ferrite stabilizers are chromium equivalents that promote ferrite
The DeLong diagram was created because the Schaeffler Diagram did not account for the very important effect of __ on stainless steels.
(A) Oxygen
(B) Carbon
(C) Nitrogen
(D) Argon
(C) Nitrogen
When it comes to determining the other side / arrow side of a weld symbol on a cruciform joint, can you go through the solid member?
No
What polarity is typically used for plasma arc cutting?
DCEN
Cellulosic SMAW rods contain a moisture content of:
(A) 1-3%
(B) 3-7%
(C) 7-10%
(D)10-30%
(B) 3-7%
What temperature are low-hydrogen SMAW electrodes stored at?
120° C (250° F)
How many times can a low-hydrogen SMAW electrode be re-baked?
Once
What kind of wire-feeder is required when opting to use CC on a wire-feed welding process?
(A) Constant speed
(B) Variable speed
(B) Variable speed
Select the correct definitions for “cast” and “helix” when it comes to welding wire.
- How much unrestrained wire coils up off a flat surface
- The unrestrained diameter of coil
“Helix” – How much unrestrained wire coils up off a flat surface
“Cast” – The unrestrained diameter of coil
Which of the following classes of FCAW wire has similar ingredients to 7018 SMAW rod?
(A) Basic
(B) Rutile
(A) Basic
Which polarity is typically used for SAW?
DCEP
After the hyphen in a FCAW wire designation, the digit containing either an L, M, or H refers to which alloying element?
Manganese
Hardness __ with cooling rate.
(A) Increases
(B) Decreases
(A) Increases
“Hot shortness” is usually a result of high __ content in steel.
Sulphur
When using an X-ray machine, increasing the voltage produces a __ wavelength.
(A) Longer
(B) Shorter
(B) Shorter
Which of the following produces a shorter wavelength?
(A) Cobalt-60
(B) Iridium-192
(A) Cobalt-60
Select the correct definitions for “accuracy” and “precision”.
- How close repeated measurements are to the “true” value.
- How close repeated values are to each other.
“Accuracy” – How close repeated measurements are to the “true” value.
“Precision” – How close repeated values are to each other.
A steel tape measure should be checked at a temperature of _° C.
20° C
Note: When using it in colder temperatures, allow 15-20 minutes for it to adjust!
According to CSA, what is the formula used to measure a convex fillet weld?
(A) 0.07 x face width + 1.6 mm
(B) 0.7 x face width + 1 mm
(C) 0.7 x leg length + 1mm
(D) 0.07 x leg length + 1.6mm
(A) 0.07 x face width + 1.6 mm
How do you measure a concave fillet weld?
Use the throat side of a fillet gauge, and ensure both sides touch the workpiece
How do you measure the size of a flare-groove weld?
(A) throat thickness (sectioning of trial welds required)
(B) face width (welding conditions factored in and unchanged)
(C) either of the above
(C) either of the above
When it comes to a skewed fillet weld, angles of less than _ are considered partial penetration groove welds.
(A) 30°
(B) 60°
(C) 90°
(D) 110°
(B) 60°
What is the correct definition of “effective throat thickness” when referring to a groove weld?
(A) the shortest distance from face to root of the weld, plus any reinforcement
(B) the shortest distance from the face to the root of the weld, minus any reinforcement
(B) the shortest distance from the face to the root of the weld, minus any reinforcement
When it comes to a CWB Welder qualification, what is a “T” classification?
(A) welding of plate/pipe from one side with backing, or both sides if backgouged
(B) complete penetration of hollow sections from one side without backing
(B) complete penetration of hollow sections from one side without backing
Which of the following FCAW wires is designed to be either self-shielded or gas-shielded?
(A) E492T-2
(B) E492T-5
(C) E491T-7
(D) There is no such wire
(B) E492T-5
Is the FCAW wire E492T-10 self-shielded or gas-shielded?
Self-shielded
True or False:
You can use an E308 grade electrode when welding 304 type stainless steel.
True!
Note: For welding austenitic stainless, it’s actually recommended to use an electrode that’s similar to the base metal, but with a higher nickel-chromium content. The additional alloying content compensates for losses during welding