CWB LEVEL II VISUAL WELDING
INSPECTOR STUDY GUIDE 2026 EDITION
COMPLETE PRACTICE QUESTIONS &
VERIFIED ANSWERS WITH DETAILED
RATIONALES | COMPREHENSIVE
CERTIFICATION EXAM PREPARATION
What polarity is typically used for plasma arc cutting? - CORRECT ANSWER
-DCEN
Cellulosic SMAW rods contain a moisture content of:
(A) 1-3%
(B) 3-7%
(C) 7-10%
(D)10-30% - CORRECT ANSWER -(B) 3-7%
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 - CORRECT 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 - CORRECT ANSWER -(B) dark
What is the Canadian Standard for safety in welding? - CORRECT ANSWER -
CSA W117.2
What is the typical three-phase input voltage in most Canadian welding
shops? - CORRECT ANSWER -600V
True or False: The cable from the workpiece back to the welding machine is
called the "ground lead". - CORRECT ANSWER -False. The correct term is
the "work lead".
What is the type of radiation that can damage living cells? - CORRECT
ANSWER -Ionizing
,Name two examples of ionizing radiation. - CORRECT 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? - CORRECT ANSWER -Shade 10
Approx. how far could spatter travel when welding/cutting from 2.5m high?
- CORRECT ANSWER -Possibly up to 6m
What is the toxic component contained in some copper alloys? - CORRECT
ANSWER -Beryllium
Which welding process will likely have the highest fume generation rate?
[SMAW / SAW / FCAW] - CORRECT ANSWER -FCAW
What do the terms TLV and TWA stand for? - CORRECT ANSWER -TLV:
Threshold limit value
TWA: Time weighted average
Is helium lighter or heavier than air? - CORRECT ANSWER -Lighter
The action of UV light on oxygen produces which toxic gas? - CORRECT
ANSWER -Ozone
, Which common fuel gas has the widest range where it can become
flammable when mixed with air? - CORRECT ANSWER -Acetylene
What substance should you NEVER apply to a stiff pressure-adjusting
screw on an oxygen regulator? - CORRECT ANSWER -Oil or grease
What is the maximum gauge pressure that acetylene should be used?
(kPa/psi) - CORRECT ANSWER -103 kPa (15 psi)
Which toxic gas is produced when welding on surfaces with chlorinated
hydrocarbon solvents? - CORRECT ANSWER -Phosgene gas
What is the typical max. OCV of an AC welding machine? - CORRECT
ANSWER -80 V
In an isometric drawing, the lines (for width, length and depth) are inclined
at an angle of how many degrees? - CORRECT ANSWER -30°
What are the maximum number of views in an orthographic drawing? -
CORRECT ANSWER -6
What are the two general classes of picture drawings? - CORRECT ANSWER -
Perspective and Isometric
What are the 5 basic joints? - CORRECT ANSWER -1) Butt
INSPECTOR STUDY GUIDE 2026 EDITION
COMPLETE PRACTICE QUESTIONS &
VERIFIED ANSWERS WITH DETAILED
RATIONALES | COMPREHENSIVE
CERTIFICATION EXAM PREPARATION
What polarity is typically used for plasma arc cutting? - CORRECT ANSWER
-DCEN
Cellulosic SMAW rods contain a moisture content of:
(A) 1-3%
(B) 3-7%
(C) 7-10%
(D)10-30% - CORRECT ANSWER -(B) 3-7%
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 - CORRECT 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 - CORRECT ANSWER -(B) dark
What is the Canadian Standard for safety in welding? - CORRECT ANSWER -
CSA W117.2
What is the typical three-phase input voltage in most Canadian welding
shops? - CORRECT ANSWER -600V
True or False: The cable from the workpiece back to the welding machine is
called the "ground lead". - CORRECT ANSWER -False. The correct term is
the "work lead".
What is the type of radiation that can damage living cells? - CORRECT
ANSWER -Ionizing
,Name two examples of ionizing radiation. - CORRECT 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? - CORRECT ANSWER -Shade 10
Approx. how far could spatter travel when welding/cutting from 2.5m high?
- CORRECT ANSWER -Possibly up to 6m
What is the toxic component contained in some copper alloys? - CORRECT
ANSWER -Beryllium
Which welding process will likely have the highest fume generation rate?
[SMAW / SAW / FCAW] - CORRECT ANSWER -FCAW
What do the terms TLV and TWA stand for? - CORRECT ANSWER -TLV:
Threshold limit value
TWA: Time weighted average
Is helium lighter or heavier than air? - CORRECT ANSWER -Lighter
The action of UV light on oxygen produces which toxic gas? - CORRECT
ANSWER -Ozone
, Which common fuel gas has the widest range where it can become
flammable when mixed with air? - CORRECT ANSWER -Acetylene
What substance should you NEVER apply to a stiff pressure-adjusting
screw on an oxygen regulator? - CORRECT ANSWER -Oil or grease
What is the maximum gauge pressure that acetylene should be used?
(kPa/psi) - CORRECT ANSWER -103 kPa (15 psi)
Which toxic gas is produced when welding on surfaces with chlorinated
hydrocarbon solvents? - CORRECT ANSWER -Phosgene gas
What is the typical max. OCV of an AC welding machine? - CORRECT
ANSWER -80 V
In an isometric drawing, the lines (for width, length and depth) are inclined
at an angle of how many degrees? - CORRECT ANSWER -30°
What are the maximum number of views in an orthographic drawing? -
CORRECT ANSWER -6
What are the two general classes of picture drawings? - CORRECT ANSWER -
Perspective and Isometric
What are the 5 basic joints? - CORRECT ANSWER -1) Butt
