These two switches are designed to isolate the EAF electrical system from the primary transformer in case of an emergency. Other electrical systems around the EAF are the delta closure‚ the power cables‚ the current conduction arm‚ and the electrode holders. The power cables provide a connection between the delta closure and the current conducting arm. It is usually made of copper wires‚ with a rubber water jacket around the outside for water-cooling the cables. The power cable is connected
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an electrode reaction : Cu → Cu2+ + 2e-. [i.e. Cu- 2e- →Cu2+]. At which electrode(anode or cathode) would such a reaction take place. Is this an example of oxidation or reduction. Ans : - At anode. Oxidation. Q. 3. A solution contains magnesium ions(Mg2+)‚ iron (II) ions (Fe2+) and copper ions (Cu2+). On passing an electric current through this solution which ions will be the first to be discharged at the cathode. Write the equation for the cathode reaction. Ans.: - Mg2+ Q.4. An electrode ‘A’
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Introduction Objectives 3.2 3.3 Tools to be Used in Welding Workshop 3.4 3.5 Experiment No. 1 Resistance Welding 3.6 Seam Welding I Practice Session 3.7 Experiment No. 2 3.8 3.9 Experiment No. 3 Seam Welding Electrodes 3.1 INTRODUCTION Welding is a process of joining similar metals by application of heat with or without application of pressure and addition of filler material. The result is a continuity of homogeneous material‚ of the composition and characteristics
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presented by the electrocardiogram reading and relate it to the heart’s electrical activity of the members. We first attached one electrode each on the inner left and right forearm and on the right wrist. Then‚ we observed the wave patterns of the electrical impulses of the heart. We also identified the different intervals needed to be observed. Next‚ we interchanged the electrodes on the forearms with each other to be able to see a change in the electrical activity of the heart. Based on the results‚ all
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years. The first ever underwater welding was carried out by British Admiralty – Dockyard for sealing leaking ship rivets below the water line. Underwater welding is an important tool for underwater fabrication works. In 1946‚ special waterproof electrodes were developed in Holland by ‘Van der Willingen’. In recent years the number of offshore structures including oil drilling rigs‚ pipelines‚ platforms are being installed significantly. Some of these structures will experience failures of its elements
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repairs‚ very much well suited for heavy metal size 4 millimetres upwards. Thinner sheet metals and alloys are usually more suited to the mig welding types. STEPS: 1. Gather your materials. You should have a welding machine‚ electrode holder with lead‚ ground clamp with lead‚ electrodes‚ and metal to be welded. You will also need are a chipping hammer to get rid of the slag and a wire brush to clean the welds. 2. Put on your safety gear. This includes a welding helmet (shade #10 or higher)‚ welding jacket
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YSZ thin films produced by pulsed laser deposition. The materials used for the electrodes and wiring of the samples‚ the measurement set-up and the sample configuration played an important role in obtaining successful impedance measurements in temperatures up to 900ºC. Part of this research was therefore contributed to finding the optimal conditions for ionic conductivity measurements on YSZ thin films. Four electrode materials were chosen and tested‚ knowing SrRuO3‚ Pt‚ Au and Pt-paste‚ but only
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CHAPTER 27&29 INTRODUCTION TO WELDING & FUSION WELDING PROCESS Dr. Tasnim Firdaus Ariff Welding Fundamentals Overview of Welding Technology 2. The Weld Joint 3. Features of a Fusion Welded Joint 1. 2 Joining and Assembly Distinguished Joining - welding‚ brazing‚ soldering‚ and adhesive bonding These processes form a permanent joint between parts Assembly - mechanical methods (usually) of fastening parts together Some of these methods allow for easy disassembly‚ while others do not 3 Welding
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Machining processes ECM Electrochemical machining (ECM) is a method of removing metal by an electrochemical process. It is normally used for mass production and is used for working extremely hard materials or materials that are difficult to machine using conventional methods.[1] Its use is limited to electrically conductive materials. ECM can cut small or odd-shaped angles‚ intricate contours or cavities in hardened exotic metals‚ such as titanium aluminised‚ Inconel‚ Waspalloy‚ and high nickel
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discharges (sparks). * Material is removed from the workpiece by a series of rapidly recurring current discharges between two electrodes‚ separated by a dielectric liquid and subject to an electric voltage. * One of the electrodes – ‘tool-electrode’ or ‘tool’ or ‘electrode’. * Other electrode - workpiece-electrode or ‘workpiece’. * As distance between the two electrodes is reduced‚ the current intensity becomes greater than the strength of the dielectric (at least in some points) causing it
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