Iet Test 2

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JohnLee397
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Iet Test 2
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2012-11-06 18:53:04
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Iet Test 2
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  1. Volume of polymers exceed that of 
    Metals
  2. Different ways of shaping plastic 
    Casting, Foamed Products, molded solid parts
  3. Casting, Foamed Products, molded solid parts
    Different ways of shaping plastic
  4. Thermoplastic polymer properties
    must be heated to form polymer melt, viscosity, shear stress to shear rate during flow
  5. must be heated to form polymer melt, viscosity, shear stress to shear rate during flow
    Thermoplastic polymer properties
  6. Polymer processes
    Extrusion, coating, injection molding, casting, foam processing, blow molding
  7. Extrusion, coating, injection molding, casting, foam processing, blow molding
    Polymer processes
  8. Extrusion
    compression process in which material is forced to flow through a die or fice.
  9. compression process in which material is forced to flow through a die or fice.
    extrusion
  10. Thickness/sheet is from
    0.5mm and higher
  11. Film is from
    0.5mm and lower
  12. Injection molding 
    most widely used process for thermoplastics/ polymer is heated to highly plastics and forced to flow under high pressure.
  13. most widely used process for thermoplastics/ polymer is heated to highly plastics and forced to flow under high pressure.
    injection molding
  14. Other molding processes 
    Compression, transfer, blow, rotational
  15. Compression, transfer, blow, rotational
    Other molding processes
  16. Polymer casting
    pouring a liquid resin into a mold using gravity and allowing a polymer to harden
  17. pouring a liquid resin into a mold using gravity and allowing a polymer to harden
    Polymer casting
  18. Polymer Foam
    Polymer and gas mixture
  19. Polymer and gas mixture
    Polymer Foam
  20. ceramic 
    an inorganic compound consisting of a metal corsemi-metal and one or more nonmetals
  21. an inorganic compound consisting of a metal corsemi-metal and one or more nonmetals
    ceramic
  22. Exp of ceramic
    silica, alumina
  23. silica, alumina
    Example of ceramic
  24. Silica main ingredient in 
    glass
  25. Alumina main ingridient in 
    clay
  26. Properties of ceramics
    high hardness, electrical and thermal insulation, chemical stability,britle, no ductility
  27. high hardness, electrical and thermal insulation, chemical stability,britle, no ductility
    properties of ceramics
  28. Ceramic products
    clay construction product, refractory ceramics, cement, glass, glass fibers, abrasives, magnetic ceramics, nuclear fuels
  29. clay construction product, refractory ceramics, cement, glass, glass fibers, abrasives, magnetic ceramics, nuclear fuels
    ceramic products
  30. Three basic categories of ceramics
    traditional, new ceramics, glasses
  31. traditional, new ceramics, glasses
    Three basic categories of ceramics
  32. Traditional ceramics
    clay, pottery, bricks, cement
  33. clay, pottery, bricks, cement
    Traditional cermaics
  34. New Ceramics
    better mechanical or physical properties than ceramics usually sythetics
  35. better mechanical or physical properties than ceramics usually sythetics
    New Ceramics
  36. Glasses 
    based on slica, non crystalline structure/amourphous
  37. based on slica, non crystalline structure/amourphous
    Glasses
  38. Imperfection in crystall structure of ceramics sames as_____
    metals
  39. Methods to strengthen ceramics
    decrease grain size, fiber reinforcement
  40. decrease grain size, fiber reinforcement
    methods to strengten ceramics
  41. Physical properties of ceramics
    Density - lighter than metals but heavier than polymers, good insulator, less theramal expansion than metals
  42. Density - lighter than metals but heavier than polymers, good insulator, less theramal expansion than metals
    Physical properties of cermamics
  43. Traditional ceramics main ingrideints 
    clay, silica, alumina
  44. clay, silica, alumina
    Traditional ceramics main ingrideints 
  45. Silica is from ____
    quartz
  46. Quartz is from ______
    Sandstone
  47. Alumina is from _____
    bauxite
  48. New ceramics are developed _______
    synthetically like abrasives
  49. Glass is 
    a state of matter as well as a type of cermic ,an amorphous
  50. a state of matter as well as a type of cermic ,an amorphous
    Glass is
  51. Ceramics  made from four most abundent elements in the earth which are
    Oxygen, silicon, aluminum, iron
  52. Oxygen, silicon, aluminum, iron
    Ceramics  made from four most abundent elements in the earth which are
  53. Distinguishes glass from traditional and new cermaics
    non crystaline structure
  54. Three engineering properties of ceramics
    High hardness, thermal and electrial insulation, chemical stability
  55. High hardness, thermal and electrial insulation, chemical stability
    Three engineering properties of ceramics
  56. Type of atomic bonding charecterizes the ceramics
    Ionic, covalent
  57. Ionic, covalent
    Type of atomic bonding charecterizes the ceramics
  58. Ceramics are stronger in tension or compression
    compression
  59. Refractory meteals are heat resistant true or false
    true
  60. Principle traditional ceramic
    clay
  61. clay is principle_____
    tradional ceramic
  62. Mineral bauxite yields what ceramic raw material
    alumina
  63. Distinguishes traditional and new ceramics
    alumina
  64. Main component in glass 
    silica
  65. Feed hopper, barrel, nozzle, mold, tie rods, nonreturn valve, clamping unit
  66. hopper, heaters, screw, breaker plate, extrudate, feed section, metering section
  67. plastic pellets, polymer melt, barrel, die, compression section
  68. extruder barrel, melt flow direction, converging die entrance, clamping ring, die opening length, extrudate profile
  69. screen pack, breaker plate, die, die opening size, polymer plate, extrusion die
  70. die cross section
  71. square extruded profile
  72. screen pack, breaker plate, section B, mandrel, air channel, spider legs
  73. extruder barrel, melt flow direction, polymer melt, A, spider leg, A, section A, air in
  74. cylinder for screw- ram, heaters, reciprocating screw, stationary patern, movable patern, clamping cylinder, hydraulic cylinder, motor and gears for screw rotation, injection unit
  75. Alumina and silicon are traditional ceramics used in what type of industrial applications?
    pottery, tableware, brick and tile, refractories, abrasives
  76. pottery, tableware, brick and tile, refractories, abrasives
    Alumina and silicon are traditional ceramics used in what type of industrial applications?
  77. main component in glass
    silica
  78. silica
    main component in glass
  79. What is glazing
    involves application of a surface coating, usually a mixture of oxides such as silica and alumina, make product less previous to moisture and less atractive to eye
  80. involves application of a surface coating, usually a mixture of oxides such as silica and alumina, make product less previous to moisture and less atractive to eye
    glazing
  81. What is the term polymer derived from? What is its meaning?
    poly meaning many
  82. three categories of polymers 
    Thermosets, thermoplastic, elastomer, 
  83. True or False  Thermosets are the most
    important category of Polymers.
    False
  84. How does the degree of polymerization affect the properties of a polymer?
    Higher dp increases mechanical stregth but increases viscosity in the fluid statte, which makes processing more difficult. 
  85. Name
    the two methods by which the synthesis of polymers occurs.
    addition and step polymerization
  86. In
    which of the three categories of Polymers is crosslinking involved?
    thermosetting and elastomers
  87. True or False    As crystallinity
    increases density increases.
    true
  88. A____________ is a compound consisting of a long chain of molecules.
    linear polymers
  89. linear polymers
    A____________ is a compound consisting of a long chain of molecules.
  90. Name the four types of structures of polymer molecules.
    linear, branched, cross linked, network structure
  91. linear, branched, cross linked, network structure
    Name the four types of structures of polymer molecules.
  92. Polymers whose molecules are made up of two repeating units of two different types are?
    copolymers
  93. copolymers
    Polymers whose molecules are made up of two repeating units of two different types are?
  94. What is the largest market for natural rubber?
    automotive tires
  95. automotive tires
    What is the largest market for natural rubber?
  96. True or False   
    The strength to weight ratio for polymers is not good.
    false
  97. Define
    Viscosity.
    a fluid property that relates the shear stress experienced during flow of the fluid to the rate of shear.
  98. a fluid property that relates the shear stress experienced during flow of the fluid to the rate of shear. 
    Viscosity
  99. Name the three sections of an (single-screw) extruder.
    feed section, compression section, metering section
  100. feed section, compression section, metering section
    Name the three sections of an (single-screw) extruder.
  101. In an extruder, what does the “breaker plate” do?
    filter contraminants and hard lumps from the melt, build pressure in metering section, straigthen the flow of the polymer melt
  102. filter contraminants and hard lumps from the melt, build pressure in metering section, straigthen the flow of the polymer melt
    In an extruder, what does the “breaker plate” do?
  103. What
    is extrudate?
    extruded product
  104. extruded product
    Whatis extrudate?
  105. What
    is a hopper on an extruder?
    contains the feedstock
  106. contains the feedstock
    Whatis a hopper on an extruder?
  107. What
    is blow molding?
    molding process in which air pressure is used to inflate soft plastic inside a mold cavity. 
  108. molding process in which air pressure is used to inflate soft plastic inside a mold cavity. 
    What is blow molding
  109. What
    plastic shaping process is used to make bottles and milk jugs?
    blow molding
  110. An expensive process used to make
    plastic products such as inflatable boats, shower curtains, and PVC floor
    covering is called what?
    calendering
  111. calendering
    An expensive process used to makeplastic products such as inflatable boats, shower curtains, and PVC floorcovering is called what?
  112. blow molding
    Whatplastic shaping process is used to make bottles and milk jugs?
  113. Portable outhouses are made using what process
    thermoplastic foam injection molding
  114. thermoplastic foam injection molding
    Portable outhouses are made using what process
  115. Polystyrene
    foam is used to make what common product?
    styrofoam
  116. What
    does the screw do in an injection molder?
    retracts melt to former position
  117. it retracts melt to former position
    Whatdoes the screw do in an injection molder?
  118. What
    processes do you observe at Quadrant?
    injection molding, compression molding, casting, extrusion
  119. Creepy
    Crawlers are most likely what Polymers?
    thermo plastic polymer polyvinylchloride (PVC)
  120. thermo plastic polymer polyvinylchloride (PVC)
    CreepyCrawlers are most likely what Polymers?
  121. Quadrant
    uses what type of polymers exclusively? 
    thermoplastic, thermosets
  122. In an
    injection-molding machine how might cooling be achieved?
    external pump which water is circulated and air vents.
  123. external pump which water is circulated and air vents.
    In aninjection-molding machine how might cooling be achieved?
  124. In an
    injection-molder, what do the ejector pins do?
    allow air to vent
  125. polyvinly chroloride is used for goop cause
    its low cost made it easy to mass produce, flexibility made it fun  for kids, and safe enough to be used in toys
  126. its low cost made it easy to mass produce, flexibility made it fun  for kids, and safe enough to be used in toys
    polyvinly chroloride is used for goop cause
  127. most common fluropolymer
    teflon
  128. teflon
    most common fluropolymer
  129. caldering
    only used in inflatable products
  130. only used in inflatable products
    caldering
  131. additives of polymers
    fillers, plasticizers, colorants, lubricants, flame retardants, antioxidants
  132. fillers, plasticizers, colorants, lubricants, flame retardants, antioxidants
    additives of polymers
  133. process done in quadrant
    injection molding a machine was used to make basic molds.
  134. injection molding a machine was used to make basic molds.
    process done in quadrant

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