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Answer :
Final answer:
Welding processes vary widely, with methods like MIG and Arc welding suited for specific applications and materials. Each welding technique has its advantages, such as shielding gases for environmental protection and the type of electrodes used. Understanding these processes is vital for successful welding in engineering.
Explanation:
Welding Processes Overview
Welding is a critical technique used in engineering for joining metal materials together through various methods that utilize heat and sometimes pressure. The selection of a welding process depends on the material type, thickness, and application.
Q7: Shielding and Suitable Processes
To shield the weld from atmospheric contamination, a process that uses a protective gas is essential, which brings us to Arc welding being suitable for joining thick sections of metal.
Q8: Source of Heat in Welding
The process where the heat comes from an electric arc established between the workpiece and the electrode is known as Arc welding.
Q9: Continuous Filler Material
The welding process that uses a filler material fed continuously from a spool is MIG welding.
Q10: Shielding Gas in MIG Welding
For MIG welding of carbon steel, a common shielding gas used is Carbon dioxide.
Q11: Primary Advantage of TIG Welding
The primary advantage of TIG welding is low heat input, making it suitable for thinner materials and precise control.
Q12: Consumable Electrode
In TIG welding, a consumable electrode is not used, unlike the other mentioned processes.
Q13: Purpose of Preheating
The purpose of preheating the base metal in welding is to improve the mechanical properties of the weld, making it less likely to crack.
Q14: Welding Non-Ferrous Metals
MIG welding is commonly used for welding non-ferrous metals like aluminum due to its ability to handle various metal types effectively.
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