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Q. Which functions used for coating?
• Improves arc stability by providing certain chemical which have this ability, by ionizing the path of arc.• Provides a protective gaseous atmosphere to prevent O2, H2 and N2 pick-up by the molten metal.• Provides a protective slag over hot metal.• Provides flux, which helps to remove oxides and other impurities from the molten weld metal.• Reduces spatter of weld metal- when coating burns off slower than core.• Acts as deoxidizers.• Adds alloying elements.• Increases deposition efficiency.• Slows down the cooling rate of weld (due to protective layer of slag) to prevent hardening.• Coatings are normally insulators of electricity and so permit the use pf electrodes in narrow grooves etc.
intial speed .
Q. Describe the type of Facing and Backing sand? Facing sand. This sand is used directly next to the surface of the pattern and comes into contact with the molten metal when th
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I am looking for an alternative coding system to the OPITZ coding system for my essay thanks
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Answer for solving this equation 4ydx+xdy=0
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Q. Structural steel materials? All structural steel materials to conform to GS-904-0510. All miscellaneous steel materials to conform to GS-904-0515. All welding consumab
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