CWB Level II Exam Study Guide
– Practice Questions with
Verified Answers. GRADED A+.
Latest 2026/2027 Update
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 - Answer✔✔-(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 - Answer✔✔-(B) dark
What is the Canadian Standard for safety in welding? - Answer✔✔-CSA W117.2
What is the typical three-phase input voltage in most Canadian welding shops?
- Answer✔✔-600V
True or False: The cable from the workpiece back to the welding machine is
called the "ground lead". - Answer✔✔-False. The correct term is the "work
lead".
What is the type of radiation that can damage living cells? - Answer✔✔-
Ionizing
Name two examples of ionizing radiation. - Answer✔✔-X-rays and Gamma rays
What is the minimum suggested shade for a welding helmet when using 5/32
SMAW electrode at 150 A? - Answer✔✔-Shade 10
Approx. how far could spatter travel when welding/cutting from 2.5m high? -
Answer✔✔-Possibly up to 6m
What is the toxic component contained in some copper alloys? - Answer✔✔-
Beryllium
,Which welding process will likely have the highest fume generation rate?
[SMAW / SAW / FCAW] - Answer✔✔-FCAW
What do the terms TLV and TWA stand for? - Answer✔✔-TLV: Threshold limit
value
TWA: Time weighted average
Is helium lighter or heavier than air? - Answer✔✔-Lighter
The action of UV light on oxygen produces which toxic gas? - Answer✔✔-
Ozone
Which common fuel gas has the widest range where it can become flammable
when mixed with air? - Answer✔✔-Acetylene
What substance should you NEVER apply to a stiff pressure-adjusting screw on
an oxygen regulator? - Answer✔✔-Oil or grease
What is the maximum gauge pressure that acetylene should be used? (kPa/psi)
- Answer✔✔-103 kPa (15 psi)
Which toxic gas is produced when welding on surfaces with chlorinated
hydrocarbon solvents? - Answer✔✔-Phosgene gas
, What is the typical max. OCV of an AC welding machine? - Answer✔✔-80 V
In an isometric drawing, the lines (for width, length and depth) are inclined at
an angle of how many degrees? - Answer✔✔-30°
What are the maximum number of views in an orthographic drawing? -
Answer✔✔-6
What are the two general classes of picture drawings? - Answer✔✔-
Perspective and Isometric
What are the 5 basic joints? - Answer✔✔-1) Butt
2) Corner
3) T
4) Lap
5) Edge
What are the 5 basic weld types? - Answer✔✔-1) Groove
2) Fillet
3) Plug/Slot
4) Surfacing
5) Edge
Plasma cutting torch temp can reach temperatures of __________ ° Celsius. -
Answer✔✔-30,000
– Practice Questions with
Verified Answers. GRADED A+.
Latest 2026/2027 Update
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 - Answer✔✔-(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 - Answer✔✔-(B) dark
What is the Canadian Standard for safety in welding? - Answer✔✔-CSA W117.2
What is the typical three-phase input voltage in most Canadian welding shops?
- Answer✔✔-600V
True or False: The cable from the workpiece back to the welding machine is
called the "ground lead". - Answer✔✔-False. The correct term is the "work
lead".
What is the type of radiation that can damage living cells? - Answer✔✔-
Ionizing
Name two examples of ionizing radiation. - Answer✔✔-X-rays and Gamma rays
What is the minimum suggested shade for a welding helmet when using 5/32
SMAW electrode at 150 A? - Answer✔✔-Shade 10
Approx. how far could spatter travel when welding/cutting from 2.5m high? -
Answer✔✔-Possibly up to 6m
What is the toxic component contained in some copper alloys? - Answer✔✔-
Beryllium
,Which welding process will likely have the highest fume generation rate?
[SMAW / SAW / FCAW] - Answer✔✔-FCAW
What do the terms TLV and TWA stand for? - Answer✔✔-TLV: Threshold limit
value
TWA: Time weighted average
Is helium lighter or heavier than air? - Answer✔✔-Lighter
The action of UV light on oxygen produces which toxic gas? - Answer✔✔-
Ozone
Which common fuel gas has the widest range where it can become flammable
when mixed with air? - Answer✔✔-Acetylene
What substance should you NEVER apply to a stiff pressure-adjusting screw on
an oxygen regulator? - Answer✔✔-Oil or grease
What is the maximum gauge pressure that acetylene should be used? (kPa/psi)
- Answer✔✔-103 kPa (15 psi)
Which toxic gas is produced when welding on surfaces with chlorinated
hydrocarbon solvents? - Answer✔✔-Phosgene gas
, What is the typical max. OCV of an AC welding machine? - Answer✔✔-80 V
In an isometric drawing, the lines (for width, length and depth) are inclined at
an angle of how many degrees? - Answer✔✔-30°
What are the maximum number of views in an orthographic drawing? -
Answer✔✔-6
What are the two general classes of picture drawings? - Answer✔✔-
Perspective and Isometric
What are the 5 basic joints? - Answer✔✔-1) Butt
2) Corner
3) T
4) Lap
5) Edge
What are the 5 basic weld types? - Answer✔✔-1) Groove
2) Fillet
3) Plug/Slot
4) Surfacing
5) Edge
Plasma cutting torch temp can reach temperatures of __________ ° Celsius. -
Answer✔✔-30,000
