CWB Level II Questions with 100% Correct
Answers
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 weld types? Correct Answer: 1)
Groove
2) Fillet
3) Plug/Slot
4) Surfacing
5) Edge
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."
Answers
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 weld types? Correct Answer: 1)
Groove
2) Fillet
3) Plug/Slot
4) Surfacing
5) Edge
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."
