Manufacturing Processes Exam 2
Tempered glass is used for all but which one of the following products?
Automobile Windshields
The Upper Half of the sand casting mold
Cope
The internal surfaces of a casting are determined during the casting process by means of a
Core
Which one of the following processes is used to produce glass tubing?
Danner Process
Glass spinning is a glassworking process used to produce which of the following types of products?
Funnel Shaped components
Turbulence during the pouring of molten metal is undesirable for what reason?
It increases erosion of the mold surfaces
Heating a metal from room temp to pouring temp in a casting operation depends on all properties except
Thermal Expansion
total permissible variation from a specified dimension
Tolerance
Which one of the following is the name of the casting process in which molten metal is poured into a rotating mold to produce a tubular part?
True Centrifugal Casting
Which one of the following terms refers to the glassy state of a material?
Vitreous
Which of the following metals would typically be used in die casting? (three best answers)
Zinc Aluminum Tin
In sand casting, the volumetric size of the pattern is
bigger than
Surface texture includes which of the following characteristics of a surface (three correct answers)?
feed marks of the tool that produced the surface deviations from the nominal surface surface cracks
In a sand-casting mold, the V/A ratio of the riser should be
greater than
A misrun is which one of the following defects in casting?
metal solidifies before filling the cavity
for which of the following reasons is a green mold named?
moisture is contained in the mold
The pattern that determines the geometry of the casting in expendable mold is usually made: undersized, oversized, the same size
oversized
Which of the following measurement instruments are considered to be graduated measuring devices (three correct answers)?
Slide Caliper Vernier Caliper Steel Rule
The box that holds the cope and the drag
Flask
The process used to produce flat plat glass in which molten glass flows onto the surface of molten tin is called which one of the following?
Float Process
A factory that performs casting processes
Foundry
Which of the following 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 begins? (two correct answers)
Squeeze Casting Liquid Metal Forging
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
Which of the following are advantages of die casting over sand casting? (four best answers)
closer tolerances better surface finish higher production rates Mold can be reused
Given that Wm = weight of the molten metal displaced by a core and Wc = weight of the core, the buoyancy force is which one of the following?
upward force = Wm - Wc
Which of the following casting processes are expendable mold operations (four correct answers)?
vacuum molding shell molding sand casting investment casting
In a GO/NO‑GO gage, which one of the following best describes the function of the GO gage?
checks the maximum material condition
Which of the following qualifies as a precision-casting process? (two correct answers)
plaster-mold casting investment casting
Centrifugal spraying is used to produce which one of the following?
Glass Wool
Classifying the sand to be melted into molten glass before shaping is best defined by which one of the following?
Grouping the grains according to size
Investment casting is also known by which one of the following names?
Lost Wax Process
Casting is a glassworking process used for
Low production
the degree of repeatability in the measurement process.
Precision
Contraction during the phase change from liquid to solid
Solidification Shrinkage
The time between pouring and complete solidification
Total Solidification Time
A riser in casting is described by
-waste metal that is usually recycled -metal that is not part of the casting -source of molten metal to feed the casting and compensate for shrinkage during solidification
Typical glass melting temperatures are in which of the following ranges?
1500°C to 1600°C
the degree to which the measured value agrees with the true value of the quantity of interest.
Accuracy
A lehr is
An annealing furnace
Two important relationships that determine the flow of molten metal in casting are
Bernoulli's Theorem & Continuity Law
a tolerance is specified in both the positive and negative directions from the nominal dimension
Bilateral Tolerance
Which of the following are metals commonly cast in permanent mold casting? (three best answers)
Brass Aluminum Magnesium
In plaster mold casting, the mold is made of which of which material
CaSO4-H20
Cupolas are furnaces used to melt which of the following metals? (one best answer)
Cast Iron
Which one of the following casting metals is most important commercially?
Cast iron
Which of the following casting processes are permanent mold operations? (two correct answers)
Centrifugal Casting Slush Casting
The empirical relationship that determines total solidification time in casting is known as
Chvorinov's Rule
The linear or angular sizes of a component specified on the drawing
Dimensions
Sand Casting is which type of casting processes?
Expendable Mold
Metal 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 which one of the following?
External Chills
The press and blow process is best suited to the production of narrow necked beverage bottles, while the blow and blow process is more appropriate for producing wide mouthed jars.
False (switch around)
A surface plate is most typically made of which one of the following materials?
Granite
Which one of the following manufacturing processes is likely to result in the best surface finish?
Grinding
Besides helping to preserve the environment, the use of recycled glass as an ingredient of the starting material in glassmaking serves what other useful purpose (one answer)?
Makes the glass easier to melt
In inspection, which procedure provides more information? Gauging or Measurement
Measurement
During the solidification of an alloy when a mixture of a solid and liquid metal is present, the solid liquid mixture is referred to as
Mushy Zone
Which of the following are likely to be GO/NO‑GO gages (three correct answers)?
Plug Gage Limit Gage Snap Gage
Surface roughness can be measured as either an arithmetic average (AA) or a root-mean-square (RMS) average. Which value is almost always greater for most surfaces?
RMS average
A channel in the mold leading from the downsprue to the main mold cavity
Runner
Which one of the following casting processes is the most widely used?
Sand Casting
Which one of the following manufacturing processes is likely to result in the worst surface finish?
Sand Casting
An irregularity in the surface of the casting caused by erosion of the sand during pouring is called which one of the following sand casting defects?
Sand Wash
An outside micrometer is appropriate for measuring which of the following (two correct answers)?
Shaft Diameter Part Length
Composition of silica sand
SiO2
Which 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 metal? (two correct answers)
Side Riser Blind Riser
Which one of the following processes or processing steps is not applicable in glassworking? Question options: sintering quenching pressing annealing
Sintering
Thermal energy is normally associated with which of the following changes in the altered layer (three best answers)?
recrystallization hardness variations heat affected zone
The charge in glassworking is which one of the following?
the starting materials in melting