State the types of heating and welding.

State the types of heating and welding.
by

1 Answer

Answer :

a) Types of heating : 

1) Power frequency electric heating:

 i) Resistance heating:

 a) Direct resistance heating

 b) Indirect resistance heating

 ii) Arc Heating:

 a) Direct arc heating (furnace)

 b) Indirect arc heating

 2) High frequency electric heating:

 iii) Induction Heating:

 a) Direct core type induction heating (furnace)

 b) Vertical core type induction heating or Ajax Wyatt induction heating

 c) Indirect core type induction heating

 d) Core less induction heating

 iv) Eddy Current heating

 v) Dielectric heating

b) Types of Welding:

 i) Resistance Welding:-

 1) Spot welding

 2) Seam welding

 3) Projection Welding

 4) Butt Welding- i) Simple butt welding

 ii) Flash butt welding

 ii) Arc welding:-

 1) Carbon Arc Welding: a) shielded welding b) unshielded welding

 2) Metal Arc Welding: a) shielded welding b) unshielded welding
by

Related questions

Heating and cooling in welding is a. Even b. Non-even c. Cannot say d. None

Description : Heating and cooling in welding is a. Even b. Non-even c. Cannot say d. None

Last Answer : b. Non-even

Forge welding involves heating of parts to elastic stage and joint is prepared by impact force. a) Yes b) No, it is done up to plastic stage c) Heating is done up to boiling point d) None of the listed

Description : Forge welding involves heating of parts to elastic stage and joint is prepared by impact force. a) Yes b) No, it is done up to plastic stage c) Heating is done up to boiling point d) None of the listed

Last Answer : b) No, it is done up to plastic stage

Among gas and electric arc welding, which has the higher rate of heating? a) Gas welding b) Electric arc welding c) Gas welding and electric arc welding have equal rate of heating d) Cannot be determined

Description : Among gas and electric arc welding, which has the higher rate of heating? a) Gas welding b) Electric arc welding c) Gas welding and electric arc welding have equal rate of heating d) Cannot be determined

Last Answer : b) Electric arc welding

What are the recognized systems for pre heating of rails ends for AT Welding? (i) Oxygen –LPG & Compressed air petrol both* (ii) Only Oxygen –LPG (iii) Only Compressed air petrol both (iv) both are correct

Description : What are the recognized systems for pre heating of rails ends for AT Welding? (i) Oxygen –LPG & Compressed air petrol both* (ii) Only Oxygen –LPG (iii) Only Compressed air petrol both (iv) both are correct

Last Answer : ) Oxygen –LPG & Compressed air petrol both*

What is Pre Heating Temperature of rail ends in AT Welding? (i) 300 ± 20oC (ii) 400 ± 20oC (iii) 500 ± 20oC (iv) 600 ± 20oC *

Description : What is Pre Heating Temperature of rail ends in AT Welding? (i) 300 ± 20oC (ii) 400 ± 20oC (iii) 500 ± 20oC (iv) 600 ± 20oC *

Last Answer : (iv) 600 ± 20oC *

During AT welding reaction is ? (i) Exothermic .* (ii) Endothermic (iii) No Reaction (iv) Heating

Description : During AT welding reaction is ? (i) Exothermic .* (ii) Endothermic (iii) No Reaction (iv) Heating

Last Answer : (i) Exothermic .*

State advantages of electric heating over other types of heating methods.

Description : State advantages of electric heating over other types of heating methods.

Last Answer : Advantages of Electric heating over the other types of heating methods: 1. It can be put into service immediately. 2. No standby losses. 3. High efficiency. 4. More economical ... low attention and supervision. 14. Protection against overheating can be provided by suitable switch gear. 

State the various types of welding.

Description : State the various types of welding.

Last Answer : i) Resistance Welding:- 1) Spot welding 2) Seam welding 3) Projection Welding 4) Butt Welding- i) Simple butt welding ii) Flash butt welding   ii) Arc welding:- 1) Carbon Arc Welding: a) shielded welding b) unshielded welding 2) Metal Arc Welding: a) shielded welding b) unshielded welding

State working principle of electric welding.

Description : State working principle of electric welding. 

Last Answer : Working principle of Electric welding: In resistance welding, sufficiently heavy current at low voltage is passed directly through two metals in contact to be welded. Heat is produced due to I2R ... industry. 15. For fabrication and repair work. 16. In other metal processing industries.

How many types and what are resistance welding ?

Description : How many types and what are resistance welding ?

Last Answer : There are six main types of resistance welding. Namely - 1. Spot Welding _ Seam Welding 3 . Projection Welding 4. Flash Welding 5. Upset Welding 7 . Percussion Welding

Sketch and label different types of gas welding flames. Also give application of any one flame.

Description : Sketch and label different types of gas welding flames. Also give application of any one flame.

Last Answer : 1) Neutral Flame: - A neutral flame is obtained when equal amounts of oxygen and acetylene are mixed and burnt in a torch.   Applications: - stainless steel, cast iron, copper ,mild ... when acetylene is supplied more than oxygen.   Applications:-high carbon steel, nonferrous alloy 

Explain any two types of resistance welding processes in detail.

Description : Explain any two types of resistance welding processes in detail.

Last Answer : 1.Resistance Spot welding: Spot welding is employed to join overlapping strips, sheets or plates of metal at small areas. The pieces are assembled between two electrodes, which must possess high electrical ... small parts. Butt Welding provides joining with no loss of the welded materials.   

List various types of flames used in gas welding.

Description : List various types of flames used in gas welding. 

Last Answer : Answer: 1. Neutral Flame 2. Oxidizing Flame 3. Carburizing Flame 

List types of welding flames used in Oxy-acetylene welding. Write their characteristics and applications.

Description : List types of welding flames used in Oxy-acetylene welding. Write their characteristics and applications.

Last Answer : Types of Flames: Characteristics Applications. 1)Neutral Flame: When oxygen and acetylene are supplied to the torch in nearly equal volumes, a neutral flame is produced. It has two ... cone of whitish colour. 3) Bluish outer cone High Carbon Steel, non - ferrous alloys,

Describe with a neat diagram, the process of any one type of electric welding.

Description : Describe with a neat diagram, the process of any one type of electric welding. 

Last Answer : Methods of electric welding :  1. Resistance welding  i Butt welding  ii Spot welding  iii Seam welding  iv Projection welding  2. Arc Welding  i Carbon arc welding  ii ... as copper, iron etc. The electric arc effectively concentrate heat on the surfaces it is desired to join.

Draw schematic diagram of welding transformer showing constructional features of a welding transformer. Also explain its working.

Description : Draw schematic diagram of welding transformer showing constructional features of a welding transformer. Also explain its working.

Last Answer : Constructional features of welding transformer: Working of welding transformer: i) It is a step down transformer that reduces the voltage from the source voltage to a voltage desired according to the demands of ... 230 V, 415 V Secondary voltage - 40 to 60 V Secondary current - 200 to 600 A

Give any three features and any two applications of welding transformer.

Description : Give Any Three Features And Any Two Applications Of Welding Transformer.

Last Answer : .embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }

Arc welding uses following electric supply

Description : Arc welding uses following electric supply (A) ac (B) dc (C) both ac and dc (D) spiral waveform 

Last Answer : both ac and dc

Which of the following generators is used for DC arc welding application ?

Description :  Which of the following generators is used for DC arc welding application ? (A) Series generator (B) Shunt generator (C) Differential compound generator (D) Over -compound generator

Last Answer : A

The type of dc generator used for arc welding purposes is a

Last Answer : The type of dc generator used for arc welding purposes is a Differentially compound generator.

Arc blow is a welding defect which is encountered in _________.

Last Answer : Arc blow is a welding defect which is encountered in arc welding using a.c. current.

In resistance welding the electrodes used are of

Last Answer : In resistance welding the electrodes used are of Non – Consumable type

State any two applications of each for the following types of electrical heating : (i) Direct resistance heating(ii) Indirect induction heating (iii) Direct.arc heating (iv) Dielectric heating

Description : State any two applications of each for the following types of electrical heating : (i) Direct resistance heating(ii) Indirect induction heating (iii) Direct.arc heating (iv) Dielectric heating

Last Answer : (i) Direct resistance heating:- 1. This type of heating used for industrial purpose 2. Salt bath heating: This utilized for the purpose of carbonizing, tempering, quenching and hardening of steel tools 3. ... purpose. 14)In foundry for heating of sand, core, which are used in molding processes.

Explain the shielded metal arc welding (SMAW) processes with neat sketch. State its two advantages and disadvantages.

Description : Explain the shielded metal arc welding (SMAW) processes with neat sketch. State its two advantages and disadvantages.

Last Answer : Working  : Shielded metal arc welding uses a metallic consumable electrode of a proper composition for generating arc between itself and the parent work piece. The molten electrode metal fills the weld ... . 2. Weld may contain slag inclusions 3. Fumes make difficult the process control.

Discuss functions of flux used to welding. Identify properties of material suitable for flux and state two materials used as flux.

Description : Discuss functions of flux used to welding. Identify properties of material suitable for flux and state two materials used as flux.

Last Answer : Functions of flux 1. A flux is a material used for removal of oxides and other undesirable substances. 2. Flux is a material used to prevent dissolve or facilitate removal of oxide. 3. ... in liquid 5. For welding alloy steel:- Mixture of boric acid , Dehydrated borax and calcium fluorides

Explain the resistance spot welding process with neat sketch. State its two advantage and disadvantage.

Description : Explain the resistance spot welding process with neat sketch. State its two advantage and disadvantage. 

Last Answer : Resistance Spot welding: Spot welding is employed to join overlapping strips, sheets or plates of metal at small areas .The pieces are assembled between two electrodes, which must possess high electrical & thermal ... for making the RSW a success. 4. The thick jobs are not easy to weld. 

State the working principle of gas welding.

Description : State the working principle of gas welding.

Last Answer : Working principle of gas welding: Gas Welding is a fusion welding process. It joins metals, using the heat of combustion of the oxygen/air and combustible gas (i.e. acetylene, hydrogen, propane, ... the components to be forced together under pressure until the weld is forms and solidifies. 

Give detail classification of welding. State important factors upon which selection of welding process depends.

Description : Give detail classification of welding. State important factors upon which selection of welding process depends. 

Last Answer : Answer: Classification of Welding 1. Arc welding a. Carbon Arc Welding; b. Shielded Metal Arc Welding (SMAW) c. Submerged Arc Welding (SAW) d. Metal Inert Gas Welding (MIG, ... workers 14. Cost of materials 15. Code or specification requirements 16. Mechanical properties desired in joints 

State any four applications of resistance welding.

Description : State any four applications of resistance welding. 

Last Answer : Answer: Applications of resistance welding: 1. Resistance welding is widely used in automotive industries. 2. Projection welding is widely used in production of nut and bolt. Projection welding is ... welding is applied in manufacturing of wheel rims, wire joints and railway track joints etc. 

State four advantages of welding.

Description : State four advantages of welding.

Last Answer : Advantages of Welding Process: 1) It produce permanent joint. 2) Large number of metals can be welded. 3) Freedom in design. 4) Strong and tight joining 5) Cost effectiveness 6) Simplicity of welded structures design 7) Welding processes may be mechanized and automated.

State the four advantages of MIG welding.

Description : State the four advantages of MIG welding.  

Last Answer : Four advantages of MIG welding: 1. High quality welds can be produced much faster. 2. Flux is not used there is no chance for the entrapment of slag in the weld metal resulting in high quality ... of metals and alloys. 5. Least expensive and highly economic. 6. Little or no post welds cleaning.

State the applications of TIG welding.

Description : State the applications of TIG welding.

Last Answer : The applications of TIG welding are as follows: 1. Mostly used to weld aluminum and aluminum alloys. 2. It is used to weld stainless steel, carbon base alloy, copper base alloy, nickel base alloy etc. 3. It is used to welding dissimilar metals. 4. It is mostly used in aerospace industries.

State four advantages of seam welding over spot welding.

Description : State four advantages of seam welding over spot welding.

Last Answer : Advantages of seam welding over spot welding:- 1. Due to seam welding we get continuous weld which is air-tight 2. Gas tight as well as liquid tight joints can be made. 3. The Overlap is ... . The production of single seam weld and parallel seams can be got simultaneously. 5. Efficient energy use.

Explain with the diagram butt welding. State its applications.

Description : Explain with the diagram butt welding. State its applications. 

Last Answer : Diagram butt welding:-  Explanation: Transformer used for welding is designed for low voltage and high current secondary. Transformer is oil cooled The job is clamped as shown in fig. two parts which ... : 1) For welding rod, wire, pipe etc 2) For joining thick metal plates or bars at end

State any factors to be considered while selecting electrical welding system.

Description : State any factors to be considered while selecting electrical welding system.

Last Answer : .embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }