Welding - GMAW (Gas Metal Arc Welding) Questions And Answers Already Graded A+
5 views 0 purchase
Course
Welding - GMAW
Institution
Welding - GMAW
*True or False:* A concave root surface is caused by the wire being too far back in the
puddle. - ️️*True:* A concave root surface is caused by the wire being too far back
in the puddle.
The Electrode should be placed at what point in the puddle, *Front/Back/side*? -
️️The Electrode sho...
Welding - GMAW (Gas Metal Arc
Welding)
*True or False:* A concave root surface is caused by the wire being too far back in the
puddle. - ✔️✔️*True:* A concave root surface is caused by the wire being too far back
in the puddle.
The Electrode should be placed at what point in the puddle, *Front/Back/side*? -
✔️✔️The Electrode should be placed at *front* point in the puddle
Name some types of ferrous metal - ✔️✔️*Ferrous Metal Types*
- *Mild Steel* - Carbon content of 0.1 to 0.3% and Iron content of 99.7 - 99.9%. Used for
engineering purposes and in general, none specialized metal products.
- *Carbon steel* - Carbon content of 0.6 to 1.4% and Iron content of 98.6 to 99.4 %.
Used to make cutting tools such as drill bits.
*Stainless Steel* - Made up of Iron, nickel and chromium. Resists staining and corrosive
and is therefore used for the likes of cutlery and surgical instrumentation.
*Cast Iron* - carbon 2 - 6% and Iron at 94 to 98%. Very strong but brittle. Used to
manufacture items such as engine blocks and manhole covers.
*Wrong Iron* - Composed of almost 100% iron. Used to make items such as ornamental
gates and fencing. Has fallen out of use somewhat.
What will happen when your voltage is set excessively low and your wire is set
excessively high? - ✔️✔️Spatter
When wire feed is increased current will *increase/decrease*? - ✔️✔️When wire feed is
increased current will *increase*
What will happen to a butt weld if the opening is too wide and the travel speed is to
slow? - ✔️✔️Too much build up of material
The power source for GMAW welding is constant *current/voltage*? - ✔️✔️The power
source for GMAW welding is constant *voltage*
GMAW is applied *automatically/semi automatically*? - ✔️✔️GMAW is applied *semi
automatically*
What is the primary problem of having excessive stickout? - ✔️✔️*Increased wire
speed* is the primary problem of having excessive stickout
, How many beads should a horizontal square groove butt joint should have? - ✔️✔️A
horizontal square groove butt joint should have *1 bead*
The shielding gas we use for GMAW is _____% _________________ gas and ____%
____________ gas. - ✔️✔️The shielding gas we use for GMAW is *75% argon* gas
and *25% carbon dioxide* gas.
*True or False:* To correct for excessive convexity you should reduce current and
increase voltage. - ✔️✔️*True:* To correct for excessive convexity you should reduce
current and increase voltage.
*True or False:* Unequal legs on a weld are caused by an incorrect work angle. -
✔️✔️*True:* Unequal legs on a weld are caused by an incorrect work angle.
Current *increases/decreases* when the electrode stickout is increased? -
✔️✔️Current *decreases* when the electrode stickout is increased
The three angles for a horizontal T joint are- ________ degrees, ________ degrees,
and _______degrees - ✔️✔️The three angles for a horizontal T joint are - *45*
degrees, *55* degrees, and *35* degrees
Lack of shielding gas causes surface ___________ in a weld. - ✔️✔️Lack of shielding
gas causes surface *porsity* in a weld.
The _________ ___________ is the fitting on the gun that the wire is fed through. -
✔️✔️The *contact tube* is the fitting on the gun that the wire is fed through.
What will cause gas lines to frost when wire welding? - ✔️✔️*Too high of gas pressuer*
will cause gas lines to frost when wire welding?
A generic universal term encompassing many application processes - ✔️✔️Wire
Welding
A type of welding that must use only noble gasses (argon is the most common)
- Helium
- Neon
- Argon
- Krypton
- Xenon
- Radon - ✔️✔️Metal Inert Gas (MIG) Welding
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 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 these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller PatrickKaylian. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $8.39. You're not tied to anything after your purchase.
