Chapter 29 RAPID PROTOTYPING and ADDITIVE MANUFACTURING

Chapter 29 RAPID PROTOTYPING AND ADDITIVE MANUFACTURING Multiple Choice Quiz There are 17 correct answers in this multiple choice quiz (some questions have multiple answers that are correct). To achieve a perfect score on the quiz, all correct answers must be given. Each correct answer is worth 1 point. Each omitted answer or wrong answer reduces the score by 1 point. Percentage score on the quiz is based on the total number of correct answers. 29.1 Rapid prototyping and additive manufacturing are two terms that refer to fabrication technologies that add layers of material to an existing part or substrate: (a) true or (b) false? 29.2 A computer model of a part design on a CAD system is called which of the following (one best answer): (a) computer prototype, (b) geometric prototype, (c) solid prototype, (d) virtual prototype, or (e) wire-frame prototype? 29.3 Machining is never used for rapid prototyping because it takes too long: (a) true or (b) false? 29.4 In the context of rapid prototyping and additive manufacturing, tessellation refers to the process of slicing the CAD model of the part into layers: (a) true or (b) false? 29.5 Which one of the following rapid prototyping processes uses a photosensitive liquid polymer as the starting material: (a) droplet deposition manufacturing, (b) fused-deposition modeling, (c) laminated-object manufacturing, (d) selective laser sintering, (e) stereolithography, or (f) three-dimensional printing? 29.6 Which of the following RP technologies uses powders as the starting material (two correct answers): (a) droplet deposition manufacturing, (b) fused-deposition modeling, (c) laminated-object manufacturing, (d) selective laser sintering, (e) stereolithography, or (f) three-dimensional printing? 29.7 Which of the following RP technologies uses molten material as the starting material (two correct answers): (a) droplet deposition manufacturing, (b) fused-deposition modeling, (c) laminated-object manufacturing, (d) selective laser sintering, (e) stereolithography, or (f) three-dimensional printing? 29.8 Which one of the following RP technologies uses solid sheet stock as the starting material: (a) droplet deposition manufacturing, (b) fused-deposition modeling, (c) laminated-object manufacturing, (d) selective laser sintering, (e) stereolithography, or (f) three-dimensional printing? 29.9 Ballistic-particle manufacturing is another name for which one of the following RP technologies: (a) droplet deposition manufacturing, (b) fused-deposition modeling, (c) laminated-object manufacturing, (d) selective laser sintering, (e) stereolithography, or (f) three-dimensional printing? 29.10 Which of the following are examples of appropriate applications of additive manufacturing in the actual production of parts and products (three best answers): (a) castings made in small quantities, (b) customized one-of-a-kind parts, (c) mass-produced metal parts, (d) parts with intricate and/or complex geometries, (e) plastic parts in small batch sizes, and (f) special textile products?

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29.11 Which of the following are problems with the current rapid prototyping and additive manufacturing technologies (three best answers): (a) inability of the designer to design the part, (b) inability to convert a solid part into layers, (c) limited material variety, (d) part accuracy, (e) part shrinkage, and (f) poor machinability of the starting material?

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