Home | | Manufacturing Technology I | Important Questions and Answers: Metal Joining Process

Chapter: Mechanical : Manufacturing Technology : Metal Joining Process

Important Questions and Answers: Metal Joining Process

Mechanical - Manufacturing Technology - Metal Joining Process




1       List out any four arc welding equipment.

Ans: The most commonly used equipments for arc welding are as follows:


(a)             A.C or D.C. machine

(b)            Wire brush


(c)             Cables and connectors


(d)            Ear thing clamps


(e)             Chipping hammer


2       What are the special features of friction welding?



         Friction welding is a solid state welding process where coalescence is produced by the heat obtained from mechanically induced sliding motion between rubbing surfaces.


       The work parts are held together under pressure.


       Its operating is simple.


       Power required for the operation is low.

•  It is used for joining steels, super alloys,    non-ferrous metals and combinations of




3.Define resistance welding process.


Ans: Resistance welding is a process where coalescence is produced by the heat obtained from resistance offered by the workpiece to the flow of electric current in a circuit of which the workpiece is a part and by the application of pressure.


4.What is the purpose of flux? (May 2008)


Ans:           1)       It acts as shield to weld.

2)                 To prevent atmospheric reaction of molten metal with atmosphere.


5.     How can slag inclusions in welding be avoided?


Ans:  Avoid multi layer welding


           Reduce arc length


           Increase electrode angle


           Avoid using large electrode

6.     How does brazing differ from braze welding?


The filler alloy is fed to one or more points  in  the  assembly  and  it drawn into the rest of the joint by capillary action.


Braze Welding     

The   filler   alloy   is      deposited directly  at     the  point    where  it  is desired.               


7                Why flux is coated on filler rods?


Ans:  The coating improves penetration and surface finish.


       Suitable coating will improve metal deposition rates.


8                What is the application of carburizing flame?



         Carburizing flame is generally used for: o Welding of


low alloy steel rods


o Non-ferrous metals o High carbon steel


9 What are the diameter and length of the electrodes available in the market?

Ans:  Standard length of electrodes are 250 mm, 300 mm and 450 mm.

         Standard diameters of electrodes are 1.6,2 ,2.5, 3.2, 4,5,6,7,8, and 9 mm.


10.            Classify various ARC welding processes


(i) Arc welding


                Carbon arc


                Metal arc


                Metal inert gas


                Tungsten inert gas


                Plasma arc


                Submerged arc




11.            Classify various GAS welding processes


(ii) Gas Welding








12.Name the various methods of Resistance Welding





Projection & Percussion.


13. What is ‘Brazing’


It is defined as the t3echnique of joining two dissimilar or similar materials by addition of special filler material. Brazing gives a much stronger joint than soldering but requires greater heat which cannot be obtained from copper in soft soldering.

14.Mention the applications of friction welding.


Used in refrigeration.

Used in super alloys.

Making simple forging.

Production of taper and reamer drills

Production of axle shafts , valves and gears.


15.Name the chemicals used in flux Manufacure.




2.Borax and boric acid. 3.Borates




Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail
Mechanical : Manufacturing Technology : Metal Joining Process : Important Questions and Answers: Metal Joining Process |

Privacy Policy, Terms and Conditions, DMCA Policy and Compliant

Copyright © 2018-2024 BrainKart.com; All Rights Reserved. Developed by Therithal info, Chennai.