Manufacturing Exam 1
the strength and hardness of steel increases as carbon content
increases
steel is an alloy containing iron and _________ carbon by weight
0.02-2.11%
a product's total manufacturing costs typically constitute what proportion of the product's selling price?
40%
in general, metals are characterized by which of the following properties
high electrical conductivity or high hardness or high thermal conductivity
which of the following are reasons why injection molding of thermosets is more difficult than injection molding of thermoplastics
allowances must be made for cross-linking of thermosets or cycle times are longer because of curing
the most important oxide in new ceramic is __________ which is produced from bauxite and has properties that promote wide variety of applications such as abrasives, bioceramics, and electrical insulators and components
alumina
as a state of matter, the term "glass" refers to an ______________ or non-crystalline structure of a solid material
amorphous
in sand casting, the volumetric size of the pattern is _______ than the cast part
bigger
when a tolerance is specified in both the positive and negative directions from the nominal dimension, it is called which one of the following
bilateral tolerance
compared to thermoplastics, thermosetting polymers are characterized by which of the following properties
cannot be remelted or higher modulus of elasticity or less ductile
which of the following processes start with a material that is in a fluid or semifluid state and solidifies the material in a cavity
casting or molding
shell molding is best described by which one of the following
casting process in which the mold is a thin shell of sand bonded by a thermosetting resin
in casting processes, a runner is which one of the following
channel in the mold leading from the downsprue to the main mold cavity
in a GO/NO-GO gage, which of the following best describes the function of the GO gage
checks the upper and lower limits on a part dimension
which of the following are properties generally associated with ceramic materials
chemical stability or high hardness or thermally insulating
which of the following alloying elements are most commonly associated with stainless steel
chromium or nickel
a ___________ is a material system composed of two or more physically distinct phases whose combination produces aggregate properties that are different from those of its constituents
composite
the upper half of a sand-casting mold is called which one of the following
cope
if we define manufacturing as a process that adds value to a material by changing its shape or properties, we are thinking _________________ about the term
economically
in a tensile test, a material exhibits ____________ behavior by returning to its original length when the load is released
elastic
pultrusion is most similar to which one of the following plastic shaping processses
extrusion
which of the following casting processes are expendable mold operations
investment casting or sand casting
which of the following bond types are classified as primary bonds
ionic bonding or metallic bonding or covalent bonding
which of the following are problems with the current RP and AM technologies
limited material variety or part accuracy or poor mechanical performance of the part
which of the following is NOT a classification of engineering materials?
liquids
the common approach to prepare control instruction in all the AM technologies involve geometric modeling (CAD), tessellation of the geometric model, and
slicing the model into layers
which of the following measurement instruments are considered to be graduated
slide caliper or steel rule or vernier caliper
which of the following is the lowest cost-per-unit volume
steel
which one of the following rapid prototyping processes uses a photosensitive liquid polymer as a the starting material
stereolithography
a phase diagram is a graphical means of representing the phases of a metal alloy system as a function of
temperature and composition
which of the three polymer types involves the greatest amount of cross-linking
thermosets
pouring rate should be carefully controlled to avoid turbulent flow which can lead to which of the following
model erosion or formation of metal oxides
compression molding differs from injection molding in which of the following respects
molds are simpler or presses are oriented vertically rather than horizontally
which one of the following is the most common type in fiber-reinforced polymer composites
thermosets
a tolerance is which one of the following
total permissible variation from a specified dimension
which application of ceramics includes high-temperature applications such as furnace walls, crucibles, and molds?
refractories
the function of the ejection system in injection molding is which of the following
remove the part from the mold cavity after molding
fiberglass is an example of a ___________ Matrix Composite
polymer
deformation processes include which of the following
extrusion or forging
which of the following are products not typically made by hand lay-up open mold operations
fishing poles or tennis rackets
a ______________ in a casting mold is the channel or network of channels by which molten metal flows into the cavity from outside the mold
gating system
which of the following RP technologies uses powders as the starting material
selective laser sintering or 3D printing
the advantage of using an open mold is which one of the following
the mold costs much less than if two matching molds were used
which of the following operations are classified as material removal processes
turning or grinding
which of the following are examples of applications of AM in engineering analysis
wind tunnel testing or stress analysis of physical model or prototype comparison to optimize aesthetic appeal
