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Exam (elaborations)

CWB Level II Practice Questions and Answers (100% Pass)

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CWB Level II Practice Questions and Answers (100% Pass) 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) Ox...

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  • August 27, 2024
  • 44
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
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  • CWB
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SophiaBennett
©SOPHIABENNETT@2024-2025 Monday, August 19, 2024 12:35 AM

CWB Level II Practice Questions and
Answers (100% Pass)

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

Page 1 of 44

,©SOPHIABENNETT@2024-2025 Monday, August 19, 2024 12:35 AM

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


Page 2 of 44

,©SOPHIABENNETT@2024-2025 Monday, August 19, 2024 12:35 AM

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


Page 3 of 44

, ©SOPHIABENNETT@2024-2025 Monday, August 19, 2024 12:35 AM

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

True or False: All plasma arc cutting equipment is operated using DCEN. -
Answer✔️✔️-True

True or False: Stainless steel can be readily cut with a normal oxy-fuel gas
process. - Answer✔️✔️-False

What are the two basic methods of plasma torch operation? - Answer✔️✔️-
Transferred and Non-Transferred arc
Page 4 of 44

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