CWB LEVEL II EXAM QUESTIONS WITH COMPLETE VERIFIED ANSWERS ALREADY PASSED
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Course
CWB
Institution
CWB
CWB LEVEL II EXAM QUESTIONS WITH COMPLETE VERIFIED ANSWERS ALREADY PASSED
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...
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
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