small simple molecules called monomers. Plasticizers are added to a binder to increase flexibility and toughness. Fillers are added to improve particular properties‚ e.g.‚ hardness or resistance to shock. Pigments are used to impart various colors. Virtually any desired color or shape and many combinations of the properties of hardness‚ durability‚ elasticity‚ and resistance to heat‚ cold‚ and acid can be obtained in a plastic. There are two basic types of plastic: thermosetting‚ which cannot be resoftened
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Radinko GLIGORIJEVIĆ Jeremija JEVTIĆ Djuro BORAK Abstract. Materials and process selection are key issues in optimal design of industrial products. Substituting and selecting materials for different machining parts is relatively common and often. Material selection is a difficult and subtle task‚ due to the immense number of different available materials. From this point of view paper deal with a set of major gear design criteria which are used for gear material selection. The main gear
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Materials Final Review (TESTS I‚ II‚ & III) Part I : Multiple Choice 1) As the temperature of a polymer increases‚ its density a. Increases b. Decreases c. Remains fairly constant 2) Which one of the three polymer types does not involve cross-linking: a. Elastomers b. Thermoplastics c. Thermosets 3) Degree of polymerization is which of the following: a. Average number of mers in the molecule chain b. Proportion of the monomer that has been polymerized c. Sum of the molecule weights of the
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Summary of proposed thesis: The weight of automobiles has been continuously increasing during the years with improving performance‚ comfort and safety features. At the same time the importance of environmental issues are of great concern because an increase in weight of the automobiles directly leads to an increase in the emission of CO2 gas. Due to the global emissions-driven push for weight reduction in cars‚ there are growing opportunities for lightweight aluminium alloy automotive body
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MMB 312 – Test #1_Solution Date: September 20‚ 2011 Marks: 50 Question 1 One kilogram of alloy of 70 wt% Pb – 30 wt% Sn is slowly cooled from 300oC See Figure 3 below for the Pb – Sn system. Calculate a) What phases form when the alloy is cooled to 250 oC? [2] b) Determine the weight percent of the phases that form at 250oC. [3] c) The weight percent of the eutectic structure and proeutectic alpha just below the eutectic temperature (183oC) and the weight in
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mostly deciduous‚ but in tropics and subtropics mostly evergreen. Hardwood contrasts with softwood (which is from Gymnosperm trees). Hardwoods are not necessarily harder than softwoods. In both groups there is an enormous variation in actual wood hardness‚ with the range in density in hardwoods completely including that of softwoods; some hardwoods (e.g. balsa) are softer than most softwoods‚ while yews an example of a hard softwood. CHARACTERISTICS
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Process capability studies determine whether a process is unstable‚ investigate any sources of instability‚ determine their causes‚ and take action to resolve such sources of instability. After all sources of instability have been resolved in a process‚ the natural behavior of the process is called its process capability. Process capability compares the output of a process (called “Voice of the Process”) with the customer’s specification limits for the outputs (called “Voice of the Customer”). A
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Types of snail: There are many types of snail but not less than 14 of these are edible. The most popular and most lucrative to breed for consumption and commercial purposes are achachatina marginata‚ archatina archatina‚ helix pomatia and helix aspersa. The first two are usually very big‚ weigh between 150 and 200g‚ lay between 5 and 300 eggs per batch and 8 times each growing season‚ and measure 90-130cm in length. The last two species of snail are helical in nature‚ generally small‚ weigh 5-25g
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Doha west power Generation and Water Distillation Station is one of the main base load plants of the country governed by the ministry of electricity and water‚ government of Kuwait. This power station is situated in Doha‚ located approx. 15 km to the west of Kuwait city. This power station is composed of eight power generating units of 300 M.W. capacity each and 16 water distillation units of 6/6.2 million imperial gallons per day capacity each. In all‚ power station is capable of generating 2400
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Technological University of the Philippines College of Industrial Technology Mechanical Engineering Technology Department CUTTING TOOLS DESIGN Prof.Josephine Alden Cutting Tools Design Page 1 Table of Contents Page Single Point Cutting Tools 3 Reporters: De Chavez‚ Melvin P. Alfafara‚ Adrian Inserts 6 Reporters: Illustrisimo‚ Rocky Gulapa‚ Karl Yshmael Twist Drills 13 Reporters: Cruz‚ Mark Joseph Enriquez‚ Jommel Milling Cutters 17 Reporters: Angles
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