On a radiograph, undercut appears as a _________ line.
(A) light
(B) dark - ANSWER(B) dark
What is the Canadian Standard for safety in welding? - ANSWERCSA W117.2
What is the typical three-phase input voltage in most Canadian welding shops? - ANSWER600V
True or False: The cable from th...
what is the canadian standard for safety in weldin
Written for
CWB Level II
CWB Level II
Seller
Follow
papersbyjol
Reviews received
Content preview
CWB Level II QUESTIONS &
ANSWERS(RATED A+)
On a radiograph, undercut appears as a _________ line.
(A) light
(B) dark - ANSWER(B) dark
What is the Canadian Standard for safety in welding? - ANSWERCSA W117.2
What is the typical three-phase input voltage in most Canadian welding shops? -
ANSWER600V
True or False: The cable from the workpiece back to the welding machine is called
the "ground lead". - ANSWERFalse. The correct term is the "work lead".
What is the type of radiation that can damage living cells? - ANSWERIonizing
Name two examples of ionizing radiation. - ANSWERX-rays and Gamma rays
What is the minimum suggested shade for a welding helmet when using 5/32 SMAW
electrode at 150 A? - ANSWERShade 10
Approx. how far could spatter travel when welding/cutting from 2.5m high? -
ANSWERPossibly up to 6m
What is the toxic component contained in some copper alloys? - ANSWERBeryllium
Which welding process will likely have the highest fume generation rate?
[SMAW / SAW / FCAW] - ANSWERFCAW
What do the terms TLV and TWA stand for? - ANSWERTLV: Threshold limit value
TWA: Time weighted average
Is helium lighter or heavier than air? - ANSWERLighter
The action of UV light on oxygen produces which toxic gas? - ANSWEROzone
Which common fuel gas has the widest range where it can become flammable when
mixed with air? - ANSWERAcetylene
What substance should you NEVER apply to a stiff pressure-adjusting screw on an
oxygen regulator? - ANSWEROil or grease
What is the maximum gauge pressure that acetylene should be used? (kPa/psi) -
ANSWER103 kPa (15 psi)
,Which toxic gas is produced when welding on surfaces with chlorinated hydrocarbon
solvents? - ANSWERPhosgene gas
What is the typical max. OCV of an AC welding machine? - ANSWER80 V
In an isometric drawing, the lines (for width, length and depth) are inclined at an
angle of how many degrees? - ANSWER30°
What are the maximum number of views in an orthographic drawing? - ANSWER6
What are the two general classes of picture drawings? - ANSWERPerspective and
Isometric
What are the 5 basic weld types? - ANSWER1) 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."
Note: Also known as "carbide precipitation" -- Chromium binds to carbides, and
"sweats out" at the grain boundaries
Plasma cutting torch temp can reach temperatures of __________ ° Celsius. -
ANSWER30,000
True or False: All plasma arc cutting equipment is operated using DCEN. -
ANSWERTrue
True or False: Stainless steel can be readily cut with a normal oxy-fuel gas process.
- ANSWERFalse
What are the two basic methods of plasma torch operation? - ANSWERTransferred
and Non-Transferred arc
In North America, the 3 othographic views most commonly-used are: TOP, FRONT
and __________ Side.
[RIGHT / LEFT] - ANSWERLEFT
, What is the difference between a "weld symbol" and a "welding symbol"? -
ANSWERA "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? - ANSWERLEFT
In a welding symbol, is the length of the weld located to the LEFT or RIGHT of the
fillet weld symbol? - ANSWERRIGHT
In what direction do the electrons flow in an electrical arc?
In arc welding, the arc temperature can exceed temperatures of __________ °
Celsius? - ANSWER30,000
Which welding process has the highest arc efficiency? - ANSWERSAW
Arc voltage __________ when arc length is increased.
[Increased / Decreased] - ANSWERIncreases
In GTAW, what type of penetration and weld width can be expected when using
DCEP? - ANSWERShallow penetration, and wide weld
Which polarity is most often chosen for direct current GTAW welding of steels and
why? - ANSWERDCEN. More heat concentrated at the workpiece --> deeper
penetration
Does SMAW use CC or CV? - ANSWERCC
For out-of-position welding, would you select a small or large diameter electrode? -
ANSWERA small diameter electrode
Does GMAW use CC or CV? - ANSWERCV
What happens to the SAW weld when you switch from DCEP to DCEN? -
ANSWERIncreased deposition rate, but less penetration
What is the temperature for storing low-hydrogen electrodes? - ANSWER120°
Celsius
When using a consumable electrode in DCEN, the majority of the heat is
concentrated on the __________.
(A) Electrode
(B) Workpiece - ANSWER(A) Electrode
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through EFT, credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller papersbyjol. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for R261,12. You're not tied to anything after your purchase.
