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Flashcards

Manufacturing Exam 1

Carolyn Denges Manufacturing English 184 cards

Cards in this deck (184)

  1. 1Thermosetspolymer involves the most cross‑linking
  2. 2Thermosetspolymer involves the most cross‑linking
  3. 3A branched molecular structure is stronger in the solid state and more viscous in the molten state than a linear structure for the same polymer(T/F)True
  4. 4glass transition temperatureAs the temperature of an amorphous polymer decreases from the liquid state, the polymer changes from liquid to rubbery. As temperature continues to decline a temperature is reached at which the material becomes hard and brittle. This temperature is called
  5. 5The defining property of a thermoplastic polymer is that it can be heated from a solid state to a viscous liquid state and then cooled back down to solid, and that this heating and cooling cycle can be applied multiple times without degrading the polymer(T/F)True
  6. 6The basic difference between low-density polyethylene and high-density polyethylene is that the latter has a much higher degree of crystallinity(T/F)True
  7. 7ThermoplasticIf you are looking for a recyclable plastic, what would you use
  8. 8CrystallineWhat type a metal will show a bigger change in volume during solidification?
  9. 9interstitialIn a alloy that is a solid solution, if one element is much smaller than the other, which type of solid solution will it likely be?
  10. 10Inverse lever ruleIn a phase diagram, if you are looking at a point in a two-phase region, what is the name of rule for determining how much of each phase you have?
  11. 11State of matter & Crystal Structurewhat is required to define a phase?
  12. 12CarbonWhat is the key alloying element in iron to make steel?
  13. 13What does a phase diagram tell you?What phase exists at a temperature and composition at equilibrium
  14. 14For most engineering applications, which has more useful properties?an alloy
  15. 15Products purchased by companies to produce products or provide servicescapital goods
  16. 16The term plant capacity refers to the maximum rate of production that a factory can achieve under assumed labor manning levels, hours of operation per week, and other operating conditions(T/F)True
  17. 17Which of the engineering materials is defined as a compound containing metallic and nonmetallic elementsCeramic
  18. 18The basic structural unit of matter is which one of the followingatom
  19. 19What is NOT an example of primary bonding?Hydrogen bonding
  20. 20A dislocation is a common example of what kind of defectLine defect
  21. 21The weak points where two crystals meet are called:Grain boundaries
  22. 22Only the chemistry of a material matters, not its structure.(T/F)False
  23. 23A material has fundamental properties and none of them can be changed with processing.( T/F)False
  24. 24Which is more important to the decisions of how to lay out and populate your production facility?Product Variety and Quality
  25. 25A job shop is likely to have what combination of product variety and quantityHigh variability and low quantity
  26. 26Casting is a process in which molten metal flows into a mold where it solidifies in the shape of the mold cavity; the term casting also applies to the part that is made by this process:(T/F)True
  27. 27A factory that performs casting processes is calledfoundry
  28. 28Sand casting is which of the following types of casting process:expendable mold
  29. 29he upper half of a sand-casting mold is called whatcope
  30. 30In casting, a flask is whatbox which holds the cope and drag
  31. 31The pattern that determines the geometry of the casting in expendable mold processes is usually madeoversized
  32. 32In casting processes, a runner is which one of the following:channel in the mold leading from the down sprue to the main mold cavity
  33. 33The internal surfaces of a casting are determined during the casting process by means of whatcore
  34. 34Heating a metal from room temperature to pouring temperature in a casting operation depends on all of the following properties except whothermal expansion
  35. 35Turbulence during pouring of the molten metal is undesirable for which of the following reasonsit increases erosion of the mold surfaces and it increases the formation of metallic oxides that can become entrapped during solidification
  36. 36Two important relationships that determine the flow of molten metal in casting are whatBernoulli's theorem and continuity law
  37. 37Total solidification time is defined as whattime between pouring and complete solidification
  38. 38During solidification of an alloy when a mixture of solid and liquid metals is present, the solid-liquid mixture is referred to as whatmushy zone
  39. 39The empirical relationship that determines total solidification time in casting is known as whatOhm's law
  40. 40According to the empirical relationship in the previous question, total solidification time is proportional to what(V/A)2; where A = surface area of casting, Hf = heat of fusion, Tm = melting temperature, and V = volume of casting
  41. 41Solidification shrinkage in casting is defined as whatcontraction during the phase change from liquid to solid
  42. 42Metal inserts in the walls of a sand mold cavity designed to remove heat from the molten metal more rapidly than the surrounding sand are called whatexternal chills
  43. 43A riser in casting is described by whatmetal that is not part of the casting, source of molten metal to feed the casting and compensate for shrinkage during solidification, and waste metal that is usually recycled
  44. 44In a sand-casting mold, the V/A ratio of the riser should begreater than
  45. 45Which of the following riser types are completely enclosed within the sand mold and connected to the main cavity by a channel to feed the molten metalblind riser, and side riser
  46. 46what casting processes is the most widely usedsand casting
  47. 47In sand casting, the volumetric size of the pattern is________the cast part?bigger than
  48. 48Silica sand has whatSiO2
  49. 49reasons is a green mold namedmoisture is contained in the mold
  50. 50Given that Wm = weight of the molten metal displaced by a core and Wc = weight of the core, the buoyancy force is whatupward force = Wm - Wc
  51. 51what casting processes are expendable mold operationsinvestment casting, sand casting, shell molding, and vacuume molding
  52. 52hell molding is best described by whatcasting process in which the mold is a thin shell of sand bonded by athermosetting resin
  53. 53The expanded polystyrene casting process uses a mold of sand packed around a polystyrene foam pattern that vaporizes when the molten metal is poured into the moldTrue
  54. 54Investment casting is also known by whatlost-wax process
  55. 55In plaster mold casting, the mold is made of which one of the following materialsCaSO4-H2O
  56. 56The Antioch process is similar to plaster-mold casting but uses a mixture of sand and plaster to make the mold:(T/F)True
  57. 57What of the following qualifies as a precision-casting processinvestment casting, and plaster-mold casting
  58. 58What of the following are metals commonly cast in permanent mold castingaluminum, brass and magnesium
  59. 59what casting processes are permanent mold operationscentrifugal casting, and slush casting
  60. 60In hot-chamber die-casting machines, molten metal is poured into an unheated chamber from an external melting container, and a piston is used to inject the metal under high pressure into the die cavity:(T/F)False
  61. 61What of the following metals would typically be used in die castingAluminum, tin, zinc
  62. 62What are advantages of die casting over sand castingbetter surface finish, closer tolerances, higher production rates, and mold can be reused
  63. 63What names are applied to a process in which a molten metal is poured into a heated lower die, and the upper die is closed to create the mold cavity only after solidification beginsliquid-metal forging, and squeeze casting
  64. 64what is the name of the casting process in which molten metal is poured into a rotating mold to produce a tubular parttrue centrifugal casting
  65. 65Cupolas are furnaces used to meltcast iron
  66. 66A misrun is what defects in casting:metal solidifies before filling the cavity
  67. 67An irregularity in the surface of the casting caused by erosion of the sand during pouring is calledsand wash
  68. 68what casting metals is most important commerciallycast iron
  69. 69What industries are classified as secondary industriesbeverages, power utilities, publishing
  70. 70Mining is classified in what industry categoriesprimary industry
  71. 71Inventions of the Industrial Revolution include whatsteam engine
  72. 72Products purchased by companies to produce products or provide services are called whatcapital goods
  73. 73The term plant capacity refers to the maximum rate of production that a factory can achieve under assumed labor manning levels, hours of operation per week, and other operating conditions(T/F)True
  74. 74Ferrous metals include whatcast iron, and steel
  75. 75What engineering materials is defined as a compound containing metallic and nonmetallic elementsceramic
  76. 76A unit operation is defined as a single manufacturing step in the sequence of steps required to transform a starting material into a final part or productTrue
  77. 77The term vulcanization is associated with whatrubber gloves
  78. 78What processes start with a material that is in a fluid or semifluid state and solidifies the material in a cavitycasting, and molding
  79. 79Particulate processing of metals involves whatpressing, bonding, and sintering
  80. 80Deformation processes include whatExtrusion forging
  81. 81What operations are classified as material removal processesgrinding, milling, and turning
  82. 82what are referred to as thin film deposition processeschemical vapor deposition, and physical vapor deposition
  83. 83what is a type of machine used to perform extrusion:press
  84. 84What features and terms are associated with batch production:medium quantity production, and setup time between batches is a disadvantage
  85. 85High-volume production of assembled products is most closely associated with what layout typesproduct layout
  86. 86A production planning and control department accomplishes what functions in its role of providing manufacturing supportorders materials and purchased parts, and schedules the order of products on a machine
  87. 87A typical production cycle time consists of what elementsactual processing time, tool handling time, and work handling time
  88. 88What cost categories are considered to be variable costs rather than fixed costsdirect labor and work material
  89. 89A product's total manufacturing costs typically constitute what proportion of the product's selling price:40%
  90. 90In the context of production equipment in a factory, the term availability is best defined by whatproportion uptime
  91. 91One of the first applications of digital computers in manufacturing was direct numerical control, which is best described by whatmain frame computers used to remotely control machine tools in a factory
  92. 92What are the three basic types of static stresses to which a material can be subjectedcompression, shear, and tensile
  93. 93What is the correct definition of ultimate tensile strength, as derived from the results of a tensile test on a metal specimen:the maximum load divided by the original area of the specimen
  94. 94If engineering stress and true stress were measured simultaneously during a tensile test ,what would have the higher value:True stress
  95. 95If engineering strain and true strain were measured simultaneously during a tensile test, which would have the higher valueEngineering Strain
  96. 96The plastic region of the stress-strain curve for a metal is characterized by a proportional relationship between stress and strain:(T/F)False
  97. 97Hooke's Law defines which one of the following regions of the stress strain relationship for engineering materials:elastic region
  98. 98The modulus of elasticity is also known as whatYoung's modulus
  99. 99What materials has the highest modulus of elasticitydiamond
  100. 100The flow curve describes the property of metals known as whatstrain hardening
  101. 101What types of stress strain relationship best describes the behavior of brittle materials such as ceramics and thermosetting plastics:perfectly elastic
  102. 102What types of stress strain relationship best describes the behavior of most metals at room temperature:elastic and strain hardening
  103. 103What types of stress strain relationship best describes the behavior of metals at temperatures above their respective recrystallization pointselastic and perfectly plastic
  104. 104The transverse rupture strength is a property usually associated with which one of the following material typesceramics
  105. 105The shear strength of a metal is commonly determined in whattorsion test
  106. 106The shear strength of a metal is usuallyless than its tensile strength
  107. 107Hardness is best defined as whatresistance to permanent indentation
  108. 108Most hardness tests involve pressing a hard object into the surface of a test specimen and measuring the resulting indentation or its effect:(T/F)True
  109. 109What materials has the highest hardness:alumina ceramic
  110. 110The formation of new strain-free grains in a metal that has been heated to an elevated temperature is called whatrecrystallization
  111. 111viscosity can be defined as the ease with which a fluid flows:(T/F)False
  112. 112A Newtonian fluid is a fluid best defined by whatits viscosity remains constant as shear rate changes
  113. 113Viscoelasticity can be defined as the property of a material that determines the strain it experiences when subjected to combinations of stress and temperature over time:(T/F)True
  114. 114The basic structural unit of matter is whatAtom
  115. 115Approximately how many different elements have been identified100
  116. 116In the Periodic Table, the elements can be divided into whatmetals, nonmetals, and semi-metals
  117. 117The element with the lowest density and smallest atomic weight is whathydrogen
  118. 118what bond types are classified as primary bondscovalent bonding, ionic bonding, and metallic bonding
  119. 119How many atoms are there in the body-centered cubic (BCC) unit cell9
  120. 120How many atoms are there in the face-centered cubic (FCC) unit cell14
  121. 121How many atoms are there in the hexagonal close-packed (HCP) unit cell17
  122. 122What are point defects in a crystal lattice structureinterstitially, Schottky defect, vacancy
  123. 123What crystal structures has the fewest slip directions and therefore the metals with this structure are generally more difficult to deform at room temperature:HCP
  124. 124Grain boundaries are an example of which one of the following types of crystal structure defectssurface defects
  125. 125Twinning is whatmechanism of plastic deformation, more likely at high deformation rates, and more likely in metals with HCP structure
  126. 126Metals are characterized by what bonding typesmetallic
  127. 127Ceramics are characterized by what bonding types:covalent and ionic
  128. 128Polymers are characterized by what bonding typescovalent, and van der Waals
  129. 129In general, metals are characterized by whathigh electrical conductivity, high hardness, and high thermal conductivity
  130. 130In general, ceramics are characterized by what propertiesbrittleness, chemical inertness, electrically insulating, and high hardness
  131. 131In general, polymers are characterized by whatelectrically insulating, low density, low thermal conductivity
  132. 132What one of the three polymer types is not a plastic:elastomers
  133. 133Which one of the three polymer types does not involve cross-linking:thermoplastics
  134. 134Which one of the three polymer types involves the greatest amount of cross-linking:thermosets
  135. 135Degree of polymerization is whataverage number of mers in the molecule chain
  136. 136A branched molecular structure is stronger in the solid state and more viscous in the molten state than a linear structure for the same polymer:(T/F)True
  137. 137Copolymers are best described by whatpolymers whose molecules are made of repeating units of two different types
  138. 138Is the degree of crystallinity in a given polymer increases, the polymer becomes denser and stiffer, and its melting temperature decreases:(T/F)False
  139. 139As the temperature of a polymer increases, its densitydecrease
  140. 140As the temperature of an amorphous polymer decreases from the liquid state, the polymer changes from liquid to rubbery. As temperature continues to decline a temperature is reached at which the material becomes hard and brittle. This temperature is called whatglass transition temperature
  141. 141Plasticizers are chemicals added to a polymer to make it softer and more flexible and to improve its flow characteristics during forming:(T/F)True
  142. 142The defining property of a thermoplastic polymer is that it can be heated from a solid state to a viscous liquid state and then cooled back down to solid, and that this heating and cooling cycle can be applied multiple times without degrading the polymer:(T/F)True
  143. 143Which one of the following is the chemical formula for the repeating unit in polyethylene:C2H4
  144. 144What plastics has the highest market share:polyethylene
  145. 145Which of the following polymers are normally thermoplasticacrylics, cellulose acetate, nylon and polyethylene
  146. 146Polystyrene (without plasticizers) is amorphous, transparent, and brittle:(T/F)True
  147. 147The fiber rayon used in textiles is based on whatcellulose
  148. 148The basic difference between low-density polyethylene and high-density polyethylene is that the latter has a much higher degree of crystallinity:(T/F)True
  149. 149Compared to thermoplastics, thermosetting polymers are characterized by what propertiescannot be remelted, capable of higher service temperatures, higher modulus of elasticity, and less ductile
  150. 150Curing of thermosetting polymers is accomplished at the fabrication plants rather than the chemical plants that supply the starting materials: (T/F)True
  151. 151Among the thermosetting polymers, the most widely used commercially is whatphenolics
  152. 152Curing of elastomers is known as what termvulcanization
  153. 153The chemical formula for polyisoprene in natural rubber is whatC5H8
  154. 154The leading commercial synthetic rubber is whatstyrene-butadiene rubber
  155. 155A partially biodegradable plastic consists of whata polymer that is not biodegradable and a natural filler that is biodegradable
  156. 156What properties or characteristics do not apply to metalshigh electrical resistivity, and ionic bonding
  157. 157An alloy is a metal composed of two or more elements, at least one of which is metallic. The two main categories of alloys are whatintermediate phases, and solid solutions
  158. 158A binary phase diagram is a phase diagram indicating the phases of two metallic elements as a function of composition and temperature at atmospheric pressure:(T/F)True
  159. 159The inverse lever rule is used to determine what in a binary phase diagram:the proportions of each phase present at a given temperature
  160. 160A eutectic alloy is whatthe composition in an alloy system for which the solidus and liquidus are at the same temperature, and the composition in an alloy system that has the lowest melting point
  161. 161The predominant phase in the iron-carbon alloy system for a composition with 99% iron at room temperature is whatferrite
  162. 162As temperature is increased to slightly above 912C (1674F), pure iron transforms into which one of the following phases:austenite
  163. 163A steel with 1.0% carbon is known as whathypereutectoid
  164. 164The strength and hardness of steel increases as carbon contentincrease
  165. 165The principal ore used in the production of iron and steel is whathematite
  166. 166Today, the two most important processes in steelmaking are whatbasic oxygen furnace, and electric arc furnace
  167. 167The iron tapped from the blast furnace is whatpig iron
  168. 168Plain carbon steels are designated in the AISI code system by what10XX
  169. 169What elements is the most important alloying ingredient in steelcarbon
  170. 170What is not a common alloying ingredient in steel:zinc
  171. 171The principal strengthening mechanism in high-strength low-alloy (HSLA) steels is whatsolid solution alloying
  172. 172What alloying elements are most commonly associated with stainless steelchromium and nickel
  173. 173High-speed steels are used in cutting tools for machining. What alloying elements are used in the highest proportion in high-speed steelmolybdenum, and tungsten
  174. 174What is the most important cast iron commercially:gray cast iron
  175. 175What metals has the lowest density:magnesium
  176. 176What metals has the highest density:platinum
  177. 177What ores is aluminum derived:bauxite
  178. 178What is the source of most commercially produced magnesiumsea water
  179. 179Traditional brass is an alloy of what metallic elementscopper and zinc
  180. 180What metals is noted for its good electrical conductivitycopper
  181. 181The Bayer process is associated with the production of what metalaluminum
  182. 182What metals has the lowest melting point:tin
  183. 183Galvanized steel is steel that has been coated with what metalZinc deficiency
  184. 184What metals is not one of the three metals used as the principal constituent in superalloyschromium

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Manufacturing Flashcards on Manufacturing Exam 1, created by Carolyn Denges on 06/02/2024.
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