CWB Level 2 All Modules (2025) comprehensive questions
and verified answers ( detailed & elaborated) ACTUAL EXAM
2025 TEST!!
What is the term used to describe the following condition of lost corrosion resistance?
!@#$%%%%%
%%%%%%
"When certain stainless steels are heated between 500-850° C, carbides form at the grain
boundaries and cause a local depletion of chromium."
(A) Oxidization
(B) Increased toughness
(C) Solution heat treatment
(D) Sensitization - (ANSWERS)(D) Sensitization
Note: Also known as "carbide precipitation" -- Chromium binds to carbides, and "sweats out"
at the grain boundaries
On a radiograph, undercut appears as a _________ line.
(A) light
(B) dark - (ANSWERS)(B) dark
What is the Canadian Standard for safety in welding? - (ANSWERS)CSA W117.2
What is the typical three-phase input voltage in most Canadian welding shops? -
(ANSWERS)600V
True or False: The cable from the workpiece back to the welding machine is called the "ground
lead". - (ANSWERS)False. The correct term is the "work lead".
What is the type of radiation that can damage living cells? - (ANSWERS)Ionizing
Name two examples of ionizing radiation. - (ANSWERS)X-rays and Gamma rays
What is the minimum suggested shade for a welding helmet when using 5/32 SMAW electrode
at 150 A? - (ANSWERS)Shade 10
Approx. How far could spatter travel when welding/cutting from 2.5m high? -
(ANSWERS)Possibly up to 6m
What is the toxic component contained in some copper alloys? - (ANSWERS)Beryllium
Which welding process will likely have the highest fume generation rate?
[SMAW / SAW / FCAW] - (ANSWERS)FCAW
,CWB Level 2 All Modules (2025) comprehensive questions
and verified answers ( detailed & elaborated) ACTUAL EXAM
2025 TEST!!
!@#$%%%%%
What do the terms TLV and TWA stand for? - (ANSWERS)TLV: Threshold limit value
%%%%%%
TWA: Time weighted average
The action of UV light on oxygen produces which toxic gas? - (ANSWERS)Ozone
Which common fuel gas has the widest range where it can become flammable when mixed with
air? - (ANSWERS)Acetylene
What substance should you NEVER apply to a stiff pressure-adjusting screw on an oxygen
regulator? - (ANSWERS)Oil or grease
What is the maximum gauge pressure that acetylene should be used? (kpa/psi) -
(ANSWERS)103 kpa (15 psi)
Which toxic gas is produced when welding on surfaces with chlorinated hydrocarbon solvents?
- (ANSWERS)Phosgene gas
What is the typical max. OCV of an AC welding machine? - (ANSWERS)80 V
In an isometric drawing, the lines (for width, length and depth) are inclined at an angle of how
many degrees? - (ANSWERS)30°
What are the maximum number of views in an orthographic drawing? - (ANSWERS)6
What are the two general classes of picture drawings? - (ANSWERS)Perspective and Isometric
What are the 5 basic joints? - (ANSWERS)1) Butt
2) Corner
3) T
4) Lap
5) Edge
What are the 5 basic weld types? - (ANSWERS)1) Groove
2) Fillet
3) Plug/Slot
4) Surfacing
5) Edge
Plasma cutting torch temp can reach temperatures of __________ ° Celsius. - (ANSWERS)30,000
,CWB Level 2 All Modules (2025) comprehensive questions
and verified answers ( detailed & elaborated) ACTUAL EXAM
2025 TEST!!
True or False: All plasma arc cutting equipment is operated using DCEN. - (ANSWERS)True
!@#$%%%%%
%%%%%%
True or False: Stainless steel can be readily cut with a normal oxy-fuel gas process. -
(ANSWERS)False
What are the two basic methods of plasma torch operation? - (ANSWERS)Transferred and Non-
Transferred arc
In North America, the 3 othographic views most commonly-used are: TOP, FRONT and
__________ Side.
[RIGHT / LEFT] - (ANSWERS)LEFT
What is the difference between a "weld symbol" and a "welding symbol"? - (ANSWERS)A "weld
symbol" indicates the specific kind of weld to be used (ex. Fillet), and is contained inside of
"welding symbol".
In a welding symbol, is the size of the weld located to the LEFT or RIGHT of the fillet weld
symbol? - (ANSWERS)LEFT
In a welding symbol, is the length of the weld located to the LEFT or RIGHT of the fillet weld
symbol? - (ANSWERS)RIGHT
In what direction do the electrons flow in an electrical arc?
(A) anode --> cathode
(B) cathode --> anode - (ANSWERS)(B) cathode --> anode
In arc welding, the arc temperature can exceed temperatures of __________ ° Celsius? -
(ANSWERS)30,000
Which welding process has the highest arc efficiency? - (ANSWERS)SAW
Arc voltage __________ when arc length is increased.
[Increased / Decreased] - (ANSWERS)Increases
In GTAW, what type of penetration and weld width can be expected when using DCEP? -
(ANSWERS)Shallow penetration, and wide weld
, CWB Level 2 All Modules (2025) comprehensive questions
and verified answers ( detailed & elaborated) ACTUAL EXAM
2025 TEST!!
Which polarity is most often chosen for direct current GTAW welding of steels and why? -
!@#$%%%%%
(ANSWERS)DCEN. More heat concentrated at the workpiece --> deeper penetration
%%%%%%
Does SMAW use CC or CV? - (ANSWERS)CC
For out-of-position welding, would you select a small or large diameter electrode? -
(ANSWERS)A small diameter electrode
Does GMAW use CC or CV? - (ANSWERS)CV
What happens to the SAW weld when you switch from DCEP to DCEN? - (ANSWERS)Increased
deposition rate, but less penetration
What is the temperature for storing low-hydrogen electrodes? - (ANSWERS)120° Celsius
When using a consumable electrode in DCEN, the majority of the heat is concentrated on the
__________.
(A) Electrode
(B) Workpiece - (ANSWERS)(A) Electrode
When using a non-consumable electrode in DCEN, the majority of the heat is concentrated on
the __________.
(A) Electrode
(B) Workpiece - (ANSWERS)(B) Workpiece
Which has a "drooping" curve characteristic - CC or CV? - (ANSWERS)CC
AC transformer welding power sources use a:
(A) step-up transformer
(B) step-down transformer - (ANSWERS)(B) Step-down transformer
What is a diode used for in a welding machine?
(A) To produce AC current
(B) To produce DC current - (ANSWERS)(B) To produce DC current
The typical duty cycle for a Class 1 industrial welding power source is:
and verified answers ( detailed & elaborated) ACTUAL EXAM
2025 TEST!!
What is the term used to describe the following condition of lost corrosion resistance?
!@#$%%%%%
%%%%%%
"When certain stainless steels are heated between 500-850° C, carbides form at the grain
boundaries and cause a local depletion of chromium."
(A) Oxidization
(B) Increased toughness
(C) Solution heat treatment
(D) Sensitization - (ANSWERS)(D) Sensitization
Note: Also known as "carbide precipitation" -- Chromium binds to carbides, and "sweats out"
at the grain boundaries
On a radiograph, undercut appears as a _________ line.
(A) light
(B) dark - (ANSWERS)(B) dark
What is the Canadian Standard for safety in welding? - (ANSWERS)CSA W117.2
What is the typical three-phase input voltage in most Canadian welding shops? -
(ANSWERS)600V
True or False: The cable from the workpiece back to the welding machine is called the "ground
lead". - (ANSWERS)False. The correct term is the "work lead".
What is the type of radiation that can damage living cells? - (ANSWERS)Ionizing
Name two examples of ionizing radiation. - (ANSWERS)X-rays and Gamma rays
What is the minimum suggested shade for a welding helmet when using 5/32 SMAW electrode
at 150 A? - (ANSWERS)Shade 10
Approx. How far could spatter travel when welding/cutting from 2.5m high? -
(ANSWERS)Possibly up to 6m
What is the toxic component contained in some copper alloys? - (ANSWERS)Beryllium
Which welding process will likely have the highest fume generation rate?
[SMAW / SAW / FCAW] - (ANSWERS)FCAW
,CWB Level 2 All Modules (2025) comprehensive questions
and verified answers ( detailed & elaborated) ACTUAL EXAM
2025 TEST!!
!@#$%%%%%
What do the terms TLV and TWA stand for? - (ANSWERS)TLV: Threshold limit value
%%%%%%
TWA: Time weighted average
The action of UV light on oxygen produces which toxic gas? - (ANSWERS)Ozone
Which common fuel gas has the widest range where it can become flammable when mixed with
air? - (ANSWERS)Acetylene
What substance should you NEVER apply to a stiff pressure-adjusting screw on an oxygen
regulator? - (ANSWERS)Oil or grease
What is the maximum gauge pressure that acetylene should be used? (kpa/psi) -
(ANSWERS)103 kpa (15 psi)
Which toxic gas is produced when welding on surfaces with chlorinated hydrocarbon solvents?
- (ANSWERS)Phosgene gas
What is the typical max. OCV of an AC welding machine? - (ANSWERS)80 V
In an isometric drawing, the lines (for width, length and depth) are inclined at an angle of how
many degrees? - (ANSWERS)30°
What are the maximum number of views in an orthographic drawing? - (ANSWERS)6
What are the two general classes of picture drawings? - (ANSWERS)Perspective and Isometric
What are the 5 basic joints? - (ANSWERS)1) Butt
2) Corner
3) T
4) Lap
5) Edge
What are the 5 basic weld types? - (ANSWERS)1) Groove
2) Fillet
3) Plug/Slot
4) Surfacing
5) Edge
Plasma cutting torch temp can reach temperatures of __________ ° Celsius. - (ANSWERS)30,000
,CWB Level 2 All Modules (2025) comprehensive questions
and verified answers ( detailed & elaborated) ACTUAL EXAM
2025 TEST!!
True or False: All plasma arc cutting equipment is operated using DCEN. - (ANSWERS)True
!@#$%%%%%
%%%%%%
True or False: Stainless steel can be readily cut with a normal oxy-fuel gas process. -
(ANSWERS)False
What are the two basic methods of plasma torch operation? - (ANSWERS)Transferred and Non-
Transferred arc
In North America, the 3 othographic views most commonly-used are: TOP, FRONT and
__________ Side.
[RIGHT / LEFT] - (ANSWERS)LEFT
What is the difference between a "weld symbol" and a "welding symbol"? - (ANSWERS)A "weld
symbol" indicates the specific kind of weld to be used (ex. Fillet), and is contained inside of
"welding symbol".
In a welding symbol, is the size of the weld located to the LEFT or RIGHT of the fillet weld
symbol? - (ANSWERS)LEFT
In a welding symbol, is the length of the weld located to the LEFT or RIGHT of the fillet weld
symbol? - (ANSWERS)RIGHT
In what direction do the electrons flow in an electrical arc?
(A) anode --> cathode
(B) cathode --> anode - (ANSWERS)(B) cathode --> anode
In arc welding, the arc temperature can exceed temperatures of __________ ° Celsius? -
(ANSWERS)30,000
Which welding process has the highest arc efficiency? - (ANSWERS)SAW
Arc voltage __________ when arc length is increased.
[Increased / Decreased] - (ANSWERS)Increases
In GTAW, what type of penetration and weld width can be expected when using DCEP? -
(ANSWERS)Shallow penetration, and wide weld
, CWB Level 2 All Modules (2025) comprehensive questions
and verified answers ( detailed & elaborated) ACTUAL EXAM
2025 TEST!!
Which polarity is most often chosen for direct current GTAW welding of steels and why? -
!@#$%%%%%
(ANSWERS)DCEN. More heat concentrated at the workpiece --> deeper penetration
%%%%%%
Does SMAW use CC or CV? - (ANSWERS)CC
For out-of-position welding, would you select a small or large diameter electrode? -
(ANSWERS)A small diameter electrode
Does GMAW use CC or CV? - (ANSWERS)CV
What happens to the SAW weld when you switch from DCEP to DCEN? - (ANSWERS)Increased
deposition rate, but less penetration
What is the temperature for storing low-hydrogen electrodes? - (ANSWERS)120° Celsius
When using a consumable electrode in DCEN, the majority of the heat is concentrated on the
__________.
(A) Electrode
(B) Workpiece - (ANSWERS)(A) Electrode
When using a non-consumable electrode in DCEN, the majority of the heat is concentrated on
the __________.
(A) Electrode
(B) Workpiece - (ANSWERS)(B) Workpiece
Which has a "drooping" curve characteristic - CC or CV? - (ANSWERS)CC
AC transformer welding power sources use a:
(A) step-up transformer
(B) step-down transformer - (ANSWERS)(B) Step-down transformer
What is a diode used for in a welding machine?
(A) To produce AC current
(B) To produce DC current - (ANSWERS)(B) To produce DC current
The typical duty cycle for a Class 1 industrial welding power source is:
