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👇 WELDER Trade Theory Syllabus 👇

1. Elementary First Aid. Importance of Welding in Industry Safety precautions in Shielded Metal Arc Welding, and Oxy Acetylene Welding and Cutting.

2. Introduction and definition of welding. Arc and Gas Welding Equipments, tools and accessories .Various Welding Processes and its applications .Arc and Gas Welding terms and definitions.

3. Different process of metal joining methods: Bolting, riveting, soldering, brazing, seaming etc. Types of welding joints and its applications. Edge preparation and fit up for different thickness. Surface-cleaning.

4. Basic electricity applicable to arc welding and related electrical terms & definitions Heat and temperature and its terms related to welding Principle of arc welding. And characteristics of arc .

5. Common gases used for welding & cutting, flame temperatures and uses. Chemistry of oxyacetylene flame. Types of oxyacetylene flames and uses. Oxy-Acetylene Cutting Equipment principle, parameters and application.

6. Arc welding power sources: Transformer, Motor Generator set, Rectifier and Inverter type welding machines and its care & maintenance. Advantages and disadvantages of A.C. and D.C. welding machines.

7. Welding positions as per EN &ASME : flat, horizontal, vertical and over head position Weld slope and rotation. Welding symbols as per BIS & AWS.

8. Arc length – types – effects of arc length. Polarity: Types and applications.

9. Calcium carbide properties and uses. acetylene gas Properties and generating methods Acetylene gas Purifier, Hydraulic back pressure valve and Flash back arrestor.

10. Oxygen gas and its properties Production of oxygen by Air liquefaction. Charging process of oxygen and acetylene gases. Oxygen and Dissolved Acetylene gas cylinders and Color coding for different gas cylinders. Gas regulators, types and uses.

11. Oxy acetylene gas welding Systems (Low pressure and High pressure). Difference between gas welding blow pipe(LP & HP) and gas cutting blow pipe Gas welding techniques. Rightward and Leftward techniques.

12. Arc blow – causes and methods of controlling. Distortion in arc & gas welding and methods employed to minimize distortion Arc Welding defects, causes and Remedies .

13. Specification of pipes, various types of pipe joints, pipe welding positions, and procedure. Difference between pipe welding and plate welding.

14. Pipe development for elbow joint, “T” joint, Y joint and branch joint. Manifold system.

15. Gas welding filler rods, specifications and sizes. Gas welding fluxes-types and functions. Gas brazing & soldering: principles, types fluxes & uses. Gas welding defects, causes and remedies.

16. Electrode: types, functions of flux, coating factor, sizes of electrode. Coding of electrode as per BIS, AWS, effects of moisture pick up. Storage and baking of electrodes. Special purpose electrodes and their applications.

17. Weld ability of metals, importance of pre heating, post heating and maintenance of inter pass temperature.

18. Classification of steel. Welding of low, medium and high carbon steel and alloy steels.

19. Effects of alloying elements on steel. Stainless steel: types weld decay and weld ability.

20. Brass- types – properties and welding methods. Copper – types – properties and welding methods.

21. Aluminium and its alloys, properties and weld ability, welding methods. Arc cutting & gouging.

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