Quiz 1 answers

Quiz 1 answers - Chapter 1- I ntroduction 1) What are the 3...

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Unformatted text preview: Chapter 1- I ntroduction 1) What are the 3 processing operation in manufacturing, give a sentence to describe each. The 3 processing operations are a) Property enhancing operations changing the physical properties of an object b) Surface Enhancing operations cleaning and coating on the surface c) Shaping operations changing the geometry of the material 2) What are the 4 shaping processes? Give a sentence or 2 to describe each. The 4 shaping operations are a) Solidification starts from melted liquid form b) Particulate starting from material containing powder c) Deformation starting from material containing ductile solid d) Material removal starting material is brittle solid 3) What are the 2 basic groups of metals and 3 categories of polymers used in manufacturing? Two basic groups of metals are a) Ferrous contains metals b) Nonferrous- does not contain metal Three basic groups of polymers are a) Thermosets b) Thermoplastics c) Elastomers 4) What is the purpose of a property enhancing process and a surface processing operation? Property enhancing operations changing the physical properties of an object Surface Enhancing operations cleaning and coating on the surface 5) What does net shape process mean? During the net shape process, most of the starting material is used and no subsequent machining is required. Chapter 5- Dimensions, tolerances, and surfaces 5.1 What is a tolerance? A tolerance is defined as the total amount by which a specified dimension is permitted to vary. 5.4 Define surface texture. Surface texture is the random and repetitive deviations from the nominal surface, including roughness, waviness, lay, and flaws. 5.11 What causes the various types of changes that occur in the altered layer just beneath the surface? Energy input resulting from the manufacturing process used to generate the surface. The energy forms can be any of several types, including mechanical, thermal, chemical, and electrical. 5.12 Name some manufacturing processes that produce very poor surface finishes. Processes that produce poor surfaces include: sand casting, hot rolling, sawing, and thermal cutting (e.g., flame cutting). 5.13 Name some manufacturing processes that produce very good or excellent surface finishes. Processes that produced very good and excellent surfaces include: honing, lapping, polishing, and superfinishing. 1) What is unilateral and bilateral tolerances and limit dimensions Three types of dimensioning are a) Bilateral When dimensions are taken in both the positive and negative directions b) Unilateral When dimensions are taken in only one direction c) Limit When there is a fixed maximum and minimum value 2) What are the 6 reasons why surfaces are important?...
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Quiz 1 answers - Chapter 1- I ntroduction 1) What are the 3...

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