Polishing and buffing are finishing processes for smoothing a workpiece’s surface using an abrasive and a work wheel. Technically polishing refers to processes that use an abrasive that is glued to the work wheel‚ while buffing uses a loose abrasive applied to the work wheel. Polishing is a more aggressive process while buffing is less harsh‚ which leads to a smoother‚ brighter finish.[1] A common misconception is that a polished surface has a mirror bright finish‚ however most mirror bright finishes
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Printed Ckt Board Types of PCB (I) Single Side (II) Double Side (III) Multi Layer (V) Flexible PCB * Single Side ( 1 layer ) :- The insulating substrate contains ckt pattern on only one side. Which is called as solder side. The other side is called component side. * Double Side (2 layer) :- Double side means the ckt pattern is present on the either side of the insulating material ckt pattern both on component side & solder side. * Flexible Cards :- Flexible
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WHAT IS FOOD? * Food is any substance that can be consumed‚ including liquid drinks. Food is the main source of energy and of nutrition for animals‚ and is usually of animal or plant origin. WHAT IS ADULTERATION? * “Adulteration” according to Chambers 21st Century Dictionary (1996) means "debasing something or rendering it impure by mixing it with something inferior or harmful." WHAT IS FOOD ADULTERATION? * Food adulteration is the act of adding or mixing something
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learned in the discussion section. _______________________________________ Changes: Physical or Chemical - KEY V. Questions: 1.Give examples of where the following properties are important. Absorbency – foam for packing materials Hardness – carbide bits to cut steel Brittleness – Peanut shell Malleability – Forging steel into materials Elasticity - Rubberbands Flexibility - Clothing 2. Why are some substances‚ like oil and gold‚ valued more than others? They are rare and require refining
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DRAWING AND ITS PROCESSES Drawing is a metalworking process which uses tensile forces to stretch metal. It is broken up into two types: sheet metal drawing and wire‚ bar‚ and tube drawing. The specific definition for sheet metal drawing is that it involves plastic deformation over a curved axis. For wire‚ bar‚ and tube drawing the starting stock is drawn through a die to reduce its diameter and increase its length. Drawing is usually done at room temperature‚ thus classified a cold working process
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cement for mortar and stucco‚ and when combined with silica sand and gravel‚ to make concrete. Silicates are also in whiteware ceramics such as porcelain‚ and in traditional quartz-based soda-lime glass. More modern silicon compounds such as silicon carbide form abrasives and high-strength ceramics. Silicon is the basis of the ubiquitous synthetic silicon-based polymers called silicones. Physical Properties Silicon is a solid at room temperature‚ with relatively high melting and boiling points of 1414
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processes related to Electrical Discharge Machining (EDM). It is a capable of machining geometrically complex or hard material components‚ that are precise and difficult-to-machine such as heat treated tool steels‚ composites‚ super alloys‚ ceramics‚ carbides‚ heat resistant steels etc. being widely used in die and mold making industries‚ aerospace‚ aeronautics and nuclear industries. The objective of this Project Report is to study the influence of operating parameters of pure copper electrode on the
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The formation of the United Nations (1945) Kegley (2007) mentions that the failure of the League of Nations‚ brought about the creation of the United Nations in 1945. Following the planning of the American‚ British and Soviet allies for a new international organization to maintain peace and security‚ the United Nations came into existence on 24 October 1945. Today‚ the United Nations has many departments that deal with vast global issues mainly humanitarian‚ economic and social. The creation of
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1 CHAPTER 1 PROJECT BACKGROUND 1.0 PROJECT BACKGROUND The main objective is to design an economic Acrylonitrile chemical plant with safer ways of processes for a minimum production rate of 100‚ 000 metric tonnes/year. 1.1 INTRODUCTION Recently‚ production of acrylonitrile has been increasing every year in many countries. The rapid growth of the industry is mainly attributed to the availability of oil and gas as feedstock‚ a well-developed infrastructure‚ and a strong base
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Engineering Production 1 (EngM 324) Cutting Tool Angles and their Significance Dr. Amr Shehata Fayed‚ Ph.D. Associate Professor Importance of clearance angle in cutting process P Leading Edge Cutting F Tool Workpiece (a) Heel fouls work and prevents leading edge from cutting Dr. Amr Shehata Fayed Mech. Eng. Dept.‚ College of Engineering‚ Jazan University Cutting Tool Angles – Page 2 Clearance Angle (a) Flat Surface (6o to 8o) P F Clearance angle (b) Heel
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