CWB Level II
1. 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
2. On a radiograph, undercut appears as a line.
(A) light
(B) dark: (B) dark
,3. What is the Canadian Standard for safety in welding?: CSA
W117.2
4. What is the typical three-phase input voltage in most
Canadian welding shops?: 600V
5. 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".
6. What is the type of radiation that can damage living cells?:
Ionizing
7. Name two examples of ionizing radiation.: X-rays and
Gamma rays
8. What is the minimum suggested shade for a welding
helmet when using
5/32 SMAW electrode at 150 A?: Shade 10
9. Approx. how far could spatter travel when welding/cutting
from 2.5m high?-
: Possibly up to 6m
10. What is the toxic component contained in some copper
alloys?: Beryllium
11. Which welding process will likely have the highest fume
generation rate?
[SMAW / SAW / FCAW]: FCAW
,12. What do the terms TLV and TWA stand for?: TLV: Threshold
limit value
TWA: Time weighted average
13. Is helium lighter or heavier than air?: Lighter
14. The action of UV light on oxygen produces which toxic
gas?: Ozone
15. Which common fuel gas has the widest range where it
can become flam- mable when mixed with air?: Acetylene
16. What substance should you NEVER apply to a stiff
pressure-adjusting screw on an oxygen regulator?: Oil or
grease
17. What is the maximum gauge pressure that acetylene
should be used? (kPa/psi): 103 kPa (15 psi)
18. Which toxic gas is produced when welding on surfaces
with chlorinated hydrocarbon solvents?: Phosgene gas
19. What is the typical max. OCV of an AC welding machine?:
80 V
20. In an isometric drawing, the lines (for width, length and
depth) are inclined at an angle of how many degrees?: 30°
21. What are the maximum number of views in an
orthographic drawing?: 6
22. What are the two general classes of picture drawings?:
Perspective and
, Isometric
23. What are the 5 basic joints?: 1) Butt
2) Corner
3) T
4) Lap
5) Edge
24. What are the 5 basic weld types?: 1) Groove
2) Fillet
3) Plug/Slot
4) Surfacing
5) Edge
25. Plasma cutting torch temp can reach temperatures of
° Cel- sius.: 30,000
26. True or False: All plasma arc cutting equipment is
operated using DCEN.-
: True
27. True or False: Stainless steel can be readily cut with a
normal oxy-fuel gas process.: False
28. What are the two basic methods of plasma torch
operation?: Transferred and Non-Transferred arc
29. In North America, the 3 othographic views most
commonly-used are: TOP, FRONT and Side.
1. 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
2. On a radiograph, undercut appears as a line.
(A) light
(B) dark: (B) dark
,3. What is the Canadian Standard for safety in welding?: CSA
W117.2
4. What is the typical three-phase input voltage in most
Canadian welding shops?: 600V
5. 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".
6. What is the type of radiation that can damage living cells?:
Ionizing
7. Name two examples of ionizing radiation.: X-rays and
Gamma rays
8. What is the minimum suggested shade for a welding
helmet when using
5/32 SMAW electrode at 150 A?: Shade 10
9. Approx. how far could spatter travel when welding/cutting
from 2.5m high?-
: Possibly up to 6m
10. What is the toxic component contained in some copper
alloys?: Beryllium
11. Which welding process will likely have the highest fume
generation rate?
[SMAW / SAW / FCAW]: FCAW
,12. What do the terms TLV and TWA stand for?: TLV: Threshold
limit value
TWA: Time weighted average
13. Is helium lighter or heavier than air?: Lighter
14. The action of UV light on oxygen produces which toxic
gas?: Ozone
15. Which common fuel gas has the widest range where it
can become flam- mable when mixed with air?: Acetylene
16. What substance should you NEVER apply to a stiff
pressure-adjusting screw on an oxygen regulator?: Oil or
grease
17. What is the maximum gauge pressure that acetylene
should be used? (kPa/psi): 103 kPa (15 psi)
18. Which toxic gas is produced when welding on surfaces
with chlorinated hydrocarbon solvents?: Phosgene gas
19. What is the typical max. OCV of an AC welding machine?:
80 V
20. In an isometric drawing, the lines (for width, length and
depth) are inclined at an angle of how many degrees?: 30°
21. What are the maximum number of views in an
orthographic drawing?: 6
22. What are the two general classes of picture drawings?:
Perspective and
, Isometric
23. What are the 5 basic joints?: 1) Butt
2) Corner
3) T
4) Lap
5) Edge
24. What are the 5 basic weld types?: 1) Groove
2) Fillet
3) Plug/Slot
4) Surfacing
5) Edge
25. Plasma cutting torch temp can reach temperatures of
° Cel- sius.: 30,000
26. True or False: All plasma arc cutting equipment is
operated using DCEN.-
: True
27. True or False: Stainless steel can be readily cut with a
normal oxy-fuel gas process.: False
28. What are the two basic methods of plasma torch
operation?: Transferred and Non-Transferred arc
29. In North America, the 3 othographic views most
commonly-used are: TOP, FRONT and Side.
