Metal Inert Gas_Metal Active Gas_ Gas Metal Arc Welder(MIG_MAG_GMAW)

Knowledge of types of fire extinguishers and their suitable uses in case of welding related fires Aware of effects of exposure to welding fume and related safety practices Knowledge of range of welding equipment available for GMAW welding Knowledge of functions of welding equipment Knowledge of principles and techniques of MIG/MAG welding Understanding of relationship between wire feed, speed control and welding current Knowledge of how to compare welding consumables for suitability for a range of given applications Knowledge of welding consumables classification as applicable to GMAW Knowledge of safe working practices and procedures to be followed when preparing and using MIG/MAG welding equipment Knowledge of hazards associated with MIG/MAG welding and safety precautions to minimize risk Knowledge of personal protective equipment to be worn for the welding activities Knowledge of correct handling and storage of gas cylinders for welding purposes Knowledge of manual MIG/MAG welding process Aware of type and thickness of base metals for welding purposes Knowledge of types (availability, typical sizes), storage (storage, identification, segregation (classification, size) of ferrous metals Knowledge of current and polarity required for GMAW Knowledge of types, selection and application of filler wires and welding electrodes Knowledge of reasons for using shielding gases, and the types and application of the various gases Knowledge of use, impact and importance of gas pressures and flow rates (in relationship to the type of material being welded) Knowledge of methods/modes of metal transfer and their uses Knowledge of types of welded joints to be produced Well versed with the terminology used for the appropriate welding positions Knowledge of type, components and features of a manual gas shielded arc welding torch Experience in how to prepare the materials in readiness for the welding activity Knowledge of purpose and correct use of anti-spatter compound Knowledge of importance and procedure to clean torch tip and liner Knowledge of how to set up and restrain the joint, and the tools and techniques to be used Aware of using appropriate tack welding size and spacing (in relationship to material thickness) Perform checks to be made prior to welding Understanding of factors that determine weld bead shape Knowledge of types of weld beads and uses (stringer, weave, weave patterns) Knowledge of weld bead quality characteristics Hands on knowledge of techniques of operating the welding equipment to produce a range of joints in the various joint positions Knowledge of effects of the electrical characteristics of the MIG/MAG welding arc Aware of how to control distortion (such as welding sequence; deposition technique) Knowledge of problems that can occur with the welding activities and how to address them Knowledge of how to close down the welding equipment safely and correctly Own responsibility to assist in preparation of the welds and weld pieces for examination Being able to check the welded joints for uniformity, alignment, position, weld size and profile Do gouging and back gouging, and understand its importance, principles, methods and procedures in welding Knowledge of purpose and importance of pre-heating requirements for base metals in preparation for welding Knowledge of purpose and importance of post-heating in welding Apply methods to achieve pre-heat and post heat requirements for welding purposes Able to identify tools and methods to measure temperature for pre-heat and post-heat requirements such as thermal chalk, thermocouple, etc. Aware of significance of diffusible hydrogen for welds and how it is measured Knowledge of procedure to conduct dye penetrant test to assess weld quality Knowledge of various procedures for visual examination of the welds for cracks Being able to identify types of non-destructive and destructive tests for assessing weld quality Knowledge of methods of removing a test piece of weld from a suitable position in the joint Knowledge of safe working practices, handling and procedures to be adopted when preparing the welds for examination Knowledge of importance of leaving the work area and equipment in a safe condition on completion of the welding activities