Engineering materials

Use of a parison is associated with which one of the following plastic shaping processes:

blow molding

In casting, a flask is which one of the following:

box which holds the cope and drag

Which one of the following cutting tools cannot be used on a turret lathe:

broach

During solidification of an alloy when a mixture of solid and liquid metals is present, the solid-liquid mixture is referred to as which one of the following:

mushy zone

The starting workpiece in steel hot rolling of plate and sheet stock is which of the following (one best answer):

slab

Which of the following powder shapes would tend to have the lowest interparticle friction:

spherical

Which of the following terms describes what a cemented carbide is (one best answer):

cermet,

Which of the following processes are used to provide the thin coatings on the surface of coated carbide inserts:

chemical vapor deposition

Which of the following processes are associated with the production of plastic sheet and film:

chill-roll extrusion

The principal component of an injection molding machine is

clamping unit

Most sheet metalworking operations are performed as which one of the following:

cold working,

Which of the following are bulk deformation processes:

extrusion

Which of the following processes are not plastic forming methods used in the shaping of traditional ceramics:

extrusion

Which of the following are sections of a conventional extruder barrel for thermoplastics:

feed section

Which of the following are variations of sheet-metal-bending operations:

flanging, hemming

As an alloying ingredient in high-speed steel, tungsten serves which of the following functions:

forms hard carbides to resist abrasion

Which of the following are not advantages of die casting over sand casting:

higher melting temperature metals

In filament winding, when the continuous filament is wound around the cylindrical mandrel at a helix angle close to 90, it is called which of the following:

hoop winding

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:

makes the glass easier to melt

A misrun is which one of the following defects in casting:

metal solidifies before filling the cavity

A lathe can not be used to perform which of the following machining operations:

milling

For which one of the following reasons is a green mold named:

moisture is contained in the mold

Which of the following descriptions applies to a V-bending operation as compared to an edge-bending operation:

used for low production

Which of the following design features would be possible to achieve by conventional pressing and sintering:

vertical stepped holes

Which one of the following terms refers to the glassy state of a material:

vitreous

Hot working of metals refers to which one of the following temperature regions relative to the melting point of the given metal on an absolute temperature scale:

0.6Tm

Typical glass melting temperatures are in which of the following ranges:

1500 C to 1600 C

Which one of the following processes is used to produce glass tubing:

Danner process

The following statement is not true for permanent molds:

Mold that metal solidifies in must be destroyed to remove casting

Silica sand has which one of the following compositions:

SiO2

A broaching operation is best described by which one of the following:

a tool with multiple teeth moves linearly past a stationary workpart

Which of the following metal would typically be used in die casting:

aluminum

A lehr is which of the following:

an annealing furnace

Which of the following are alternative names for indirect extrusion:

backward extrusion

The following equipment is used for crushing and grinding of minerals in the preparation of traditional ceramics raw materials. Which of the pieces listed is used for grinding:

ball mill, roller mill

A molding operation that uses sheet-molding compound (SMC) is a form of which one of the following:

compression molding

Which one of the following molding processes is the most important in the production of products made of conventional rubber:

compression molding

Other names for open mold processes include which of the following :

contact molding

Filament winding involves the use of which one of the following fiber reinforcements:

continuous filaments

Which of the following casting process is permanent mold operation:

die casting

Which one of the four types of chip would be expected in a turning operation conducted at low cutting speed on a brittle work material:

discontinuous

When is the tread pattern imprinted onto the circumference of the tire:

during molding,

Springback in a sheet-metal-bending operation is the result of which one of the following:

elastic recovery of the metal

Sand casting is which of the following types:

expendable mold

Production of pipes and tubes is associated with which of the following bulk deformation processes:

extrusion

Pultrusion is most similar to which one of the following plastic shaping processes:

extrusion

Which of the following processes combines pressing and sintering of the metal powders:

hot isostatic pressing

Which one of the following processes for the new ceramic materials accomplishes shaping and sintering simultaneously:

hot pressing

In which of the following properties do plastic parts often compare favourably with metals:

impact resistance

Which of the following are the purposes of finishing operations used for parts made of the new ceramics:

improve surface finish,

An increase in cobalt content has which of the following effects on WC-Co cemented carbides:

increases toughness

A tap is a cutting tool used to create which one of the following geometries:

internal threads

Which of the following casting process is expendable mold operation:

investment casting

Which of the following qualifies as a precision-casting process:

investment casting

Turbulence during pouring of the molten metal is undesirable for which of the following reasons

it increases erosion of the mold surfaces

A facing operation is normally performed on which one of the following machine tools:

lathe

Which one of the following is the best definition of bend allowance:

length before bending of the straight sheet-metal section to be bent

Investment casting is also known by which one of the following names:

lost-wax process

Casting is a glassworking process used for

low production

A roughing operation generally involves which one of the following combinations of cutting conditions (where v = cutting speed, f = feed, and d = depth):

low v, high f and d

Which one of the following press types is usually associated with the highest production rates in sheet-metal-stamping operations:

open back inclinable

Of the following processes, which one is noted for the highest material removal rates:

plasma arc cutting

The most important rubber product is which one of the following:

pneumatic tires

The chemical name of the ingredient recovered from the latex of the rubber tree is which one of the following:

polyisoprene,

The two most common polymer foams are which of the following:

polystyrene, polyurethane

Which of the following statements is correct in the context of metallic powders:

porosity + packing factor = 1.0

Which of the following are examples of generating the workpart geometry in machining, as opposed to forming the geometry:

profile milling

Which one of the following stamping dies is the most complicated:

progressive die

Which of the following are the two main functions of a cutting fluid in machining:

reduce friction at the tool-chip interface

With which one of the following geometric forms is the drilling operation most closely associated:

round hole

In cold isostatic pressing, the mold is most typically made of which one of the following:

rubber

Which one of the following casting processes is the most widely used:

sand casting

Which one of the following turning machines permits very long bar stock to be used:

screw machine

Which of the following defects or problems is associated with injection molding :

short shots

Which one of the following processes or processing steps is not applicable in glassworking:

sintering

Which of the following are characteristics of the orthogonal cutting model:

the cutting edge is perpendicular to the direction of cutting speed,

The charge in glassworking is which one of the following:

the starting materials in melting

Which of the following processes are generally limited to thermoplastic polymers:

thermoforming

Which one of the following is the most common polymer type in fiber-reinforced polymer composites:

thermosets

Total solidification time is defined as which one of the following:

time between pouring and complete solidification

The chip thickness ratio is which one of the following (where tc = chip thickness before the cut, f = feed, d = depth, and w = width of cut):

to/tc

A lathe is used to perform which one of the following manufacturing operations:

turning

Given that Wm = weight of the molten metal displaced by a core and W= weight of the core, the buoyancy force is which one of the following:

upward force = Wm - Wc

End milling is most similar to which one of the following:

face milling

The cutting force in a sheet-metal blanking operation depends on which mechanical property of the metal:

strain rate

The term encapsulation refers to which one of the following plastics shaping processes:

casting

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 and characteristics of hot working relative to cold working:

fracture of workpart is less likely

Which of the following manufacturing processes are classified as material removal processes:

grinding, machining

Which of the following are not normally used in the processing of thermoplastic elastomers:

vulcanization

The parting line in injection molding is which one of the following:

where the two mold halves come together

Which of the following ingredients do not contribute to the vulcanizing process:

carbon black

Most rubber products are properly classified into which of the following categories:

carbon black reinforced elastomer, fiber-reinforced composite, polymer matrix composite

Cupolas are furnaces used to melt which of the following metals:

cast iron

If a glass part with a wall thickness of 5 mm (0.20 in) takes 10 minutes to anneal, how much time would a glass part of similar geometry but with a wall thickness of 7.5 mm (0.30 in) take to anneal (choose the one closest answer):

20 minutes

If the cutting conditions in a turning operation are cutting speed = 300 ft/min, feed = 0.010 in/rev, and depth of cut = 0.100 inch, which one of the following is the material removal rate (where 1 ft.= 12 inch):

3.6 in3/min

In plaster mold casting, the mold is made of which one of the following materials:

CaSO4-H2O

Of the following rubber additives, which one would rank as the single most important:

carbon black

Which one of the following casting metals is most important commercially:

cast iron

The maximum possible draft in a rolling operation depends on which of the following parameters:

coefficient of friction between roll and work, roll diameter