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