Welding Interview Questions and Answers
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Welding Interview Questions and Answers list
Q) Define welding?
A) The procedure of connecting two similar or dissimilar metals by fusion, with or without filler metal use or Fusion or Application of pressure is known as Welding.
Q) Explain how many types of welding?
A) Generally, there are two types of welding, they are:
Pressure welding or Forge
Non pressure welding or Fusion
The remaining subclass welding are spot welding, Electric arc, Gas weld, seam weld, Thermit, TIG, MIG, and Submerged arc welding, etc.
Q) What are the names of welding join?
A) Following are the general used joint welding:
T – Joint
Q) What is meant by Arc welding?
A) Arc welding is a fusion welding procedure in which welding heat is coming from an electric arc struck in the middle of electrode and base metal. The heating temperature obtained by the electric arc is 6000C to 7000C order.
Q) What is meant by Metallic Inert Gas arc welding?
A) MIG stands for Metallic Inert Gas welding, The welding MIG consumes electrodes. Arc deposits the filler metal which is fully surrounded by an inert gas.
Q) What is meant by Tungsten Inert Gas arc welding?
A) TIG stands for Tungsten Inert Gas arc welding. From an arc, the welding TIG heat is obtained in between non-consumable electrode tungsten and the work piece. The welding zone is covered by an inert gas atmosphere which is produced from a matchable source.
Q) What is meant by Submerged arc welding?
A) The submerged arc welding is obtained between a workpiece and bare metal. The submerged arc welding is preferably done on alloy steel and low carbon, but submerged arc welding is mostly used on nonferrous metals.
Q) What is the necessary equipment for gas welding?
A) Following are the necessary equipments for gas welding:
Hose and Hose fitting
Welding torch tip
Q) Mention the types of Gas flames?
A) Total, we use 3 types of gas flames for gas welding, they are:
Q) What is the full form of welding rod 7018?
A) The welding rod 7018 stands for:
70 – Ultimate tensile strength
1 – Single position of welding
8 – Amount of flux and current configuration.
Q) What is meant by spot welding?
A) The spot welding helps to connect the metal parts which are generally around 3 mm thickness. In between 2 copper electrodes, the material to be welded. The electric current travels through the material to weld the 2 metals while maintaining the pressure on them.
Q) What is meant by seam welding?
A) Seam welding is much more complicate when compare with spot welding. It is used to make items like fuel tanks. In spot welding, 2 copper wheels will replace with electrodes. The wheels create seams with 2 pieces of metal that binding them together.
Q) How many types of common joints are there, what are there?
A) Following are the common joint types, they are:
Open corner joints
Closed corner joints
Q) Define WPS?
A) WPS stands for Welding Procedure Specifications, WPS is considered a written document that gives the direction to the welding operator, so it helps them to make the production weld.
Q) What is the meant by welding process?
A) Following are the welding process types:
GTAW means Gas Tungsten Arc Welding
SAW – Submerged Arc welding
SMAW – Shielded Metal Arc Welding
FCAW – Flux Coated Arc welding
PAW – Plasma arc welding
GMAW – Gas metal arc welding.
Q) How many types of grooves are there?
A) There is total 3 types of grooves, they are:
U – Groove
V – Groove
Double V Groove.
Q) What are the types of Common Welds?
A) Below are the common welds types:
Plug / Slot welds
Q) Mention some of the welding imperfections?
A) The main important welding imperfections are:
Surface and profile, Misalignment, Cracks, Gas pores & Carities, Lack of fusion, Mechanical or surface damage.
Q) Mention some of the ultrasonic welding applications?
A) The ultrasonic welding applications are:
This is used for 3 mm thick welding metals.
The electrical and components of electronic can be welded.
We can join thin sheets with thick sheets and plastic components also joined.
Ultrasonic welding can be used in aircraft parts and nuclear reactors.
Q) How many techniques we used in diffusion welding?
A) The diffusion welding techniques are mention below:
Vacuum furnace technique
Hot pressure technique
Gas pressure technique.
Q) List out the atomic hydrogen welding advantages?
A) The atomic hydrogen welding advantages are:
Produce higher heat.
Forms Uniform and smooth weld.
Higher quality weld joint can be coming out.
More than A.C supply, the tungsten electrode life is more.
Q) What is meant by slag welding?
A) The combination of silicate material and carbonate, the slag is formed in flux and gets gases which pushes it back, to prevent the purpose, when the heat provides and reaches to the weld zone.
Q) SMAW Vs MIG?
SMAW is known as Shielded metal arc welding and MIG stands for Metal inert gas welding.
In SMAW flux, we use cored electrode for welding and after arc obtains, gases obtained by burning of flux protects welding arc.
In Metal Inert Gas welding, Inert gas is flowed surrounding the arc obtained by the bare electrode of the same as metal being welded. For shielding, inert gases are useful such as argon and helium.
Q) MIG and TIG differences?
Both Metal Inert Gas and Tungsten Inert Gas are shielded arc welding applications, both have dissimilarities.
The MIG welds are created with an electrode that is consumable, whereas TIG welds are created with a Non-consumable electrode, These TIG welds are filler metal as well.
Both MIG and TIG welds are automated. Whereas TIG weld equipment is expensive and very tough to set up, that is the reason TIG weld is a complicated procedure compared to the MIG weld process.
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