ELECTRIC HEATING AND WELDING

May 14th, 2015
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Resistance, Inductance and Arc furnaces – Construction and fields of application – Losses in oven and efficiency - High frequency - Dielectric heating – Characteristics of carbon and metallic arc welding – butt welding – spot welding

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2unitUNIT-IIELECTRIC HEATING AND WELDINGUNIT II: ELECTRIC HEATING AND WELDINGResistance, Inductance and Arc furnaces Construction and fields of application Losses in oven and efficiency - High frequency - Dielectric heating Characteristics of carbon and metallic arc welding butt welding spot welding.University 11marks:1. Explain the various methods of heating2. Explain the working of induction heating also discuss the working, advantages, demerits and applications of high frequency eddy current heating. 3. Describe the construction and working of a 3 phase arc furnace. Also discuss the demerits of direct electric arc furnace. 4. Explain the principle of dielectric heating and its applications. 5. Explain the working principle and different methods of induction heating. Bring out their applications. 6. Explain the working of arc furnaces and describe with the help of a sketch, the construction and working of any one type of furnace. 7. Discuss the various types of electric welding with the help of neat diagrams. 8. Explain resistance welding with neat diagram.9. With necessary diagram explain the process of carbon arc welding and metallic arc welding. 10. Explain the butt welding and spot welding in detail.11. With necessary figure explain the process of metallic arc welding. 12. Explain with neat sketch how the spot welding is carried out by a spot welding machine. 13. Explain the process of butt welding.1 EXPLAIN THE VARIOUS METHODS OF HE

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