Manufacturing Exam 1

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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


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