FINAL EXAM

The maximum number of steps you can program for MiniMover robot is

3

In the heating of most metal alloys, melting begins at a certain temperature and concludes at a higher temperature. In these cases, which of the following temperature marks the end of melting:

: liquidus

Die casting is suitable for low volume manufacturing

False

Flash in impression die forging serves no useful purpose it must be trimmed from the part after forming:

False

Weld failures occur mostly in which of the following zone?

Fusion zone, heat affected zone

Which one of the following arc welding processes uses a nonconsumable electrode:

GTAW

Which type of the following fit does the snap fit belong to?

Interference fit

Which of the following scraps from the manufacturing process typically cannot be recycled?

Mixed materials

Which of the following dies is the most complicated

Progressive Die

"Stick" welding is a term sometimes applied when referring to

SMAW

Which of the following welding process is the preferred method of joining the rails of railway?

THERMIT

Which of the following mold property is used to describe the ability to resist cracking on contact with the molten metal in sand casting.

Thermal stability

In CNC Incremental positioning, the G Code we use is

absolute

Which of the following gas has the highest flame temperature during the oxyfuel gas welding?

acetylene

Which of the following metals would typically be used in die casting (three correct answers):

aluminum, zinc, and tin

On which one of the following metals is the treatment called austenitizing be performed:

steel

Advantages of snap fit assembly include which of the following (three best answers):

the method is fast, no tooling is required, the parts can be designed with self-aligning features for ease of mating

The heat transfer factor in welding is correctly defined by which one of the following:

the proportion of the total heat generated at the source that is received at the work surface

Which of the following processes are generally limited to thermoplastic polymers (two best answers):

thermoforming and blow molding

Most externally threaded fasteners are produced by which one of the following processes:

thread rolling

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

time between pouring and complete solidification

Which of the following metals are used in solder alloys (four correct answers):

tin, silver, lead, antimony

Which of the following is the most common metal state to which the steel is heated in order to start heat treatment:

solidus

Which of the following bulk deformation processes are involved in the production of nails (both nail head and nail body) of lumber construction (three best answers):

bar and wire drawing, flashless forging, impression die forging

Groove welds are most closely associated with which one of the following joint types:

butt

The most important ingredient of a typical hardened steel is

carbon

Martensite formation process is most effective with the following metal:

carbon steel

Oxyfuel gas welding works best on which of the following metal:

carbon steel

Which of the following process is the best way to make a car engine block?

casting

Which of the following is not a function of a flux in brazing or soldering:

chemically etch the surface to increase roughness for a better adhesion of the filler metal

Which of the following rolling mill types are associated with relatively small diameter rolls in contact with the work (two correct answers):

cluster mill, four-high mill

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

cold working

32. Production of pipes and tubes is associated with which of the following bulk deformation processes (three correct answers):

extrusion, roll piercing, tube sinking

Which of the following are variations of sheet-metal-bending operations (two best answers):

flanging and hemming

Which of the following operations are closely related to open-die forging (three best answers):

flashless forging, impression-die forging, upsetting

Which of the following process is most similar to the waffle making process in your breakfast?

forging

Which of the following are advantages and characteristics of hot working relative to cold working (four correct answers):

fracture of workpart less likely, isotropic mechanical properties, lower deformation forces, more significant shape changes are possible

Which of the following are the usual objectives of heat treatment (three best answers):

increase hardness, increase recrystallization temperature

What are some of the ingredients usually added to the metallic powders during blending and/or mixing (three correct answers)

lubricants, binders, deflocculants

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

metal solidifies before filling the cavity

Which of the following design features would be difficult or impossible to achieve by conventional pressing and sintering (three best answers):

outside rounded corners, side holes, threaded holes

In a bolt-and-nut assembly, which of the following failure is the most common problem:

overtightening bolted joints

The most common polymer foams are which of the following:

polystyrene and polyurethane

Impregnation refers to which of the following (two best answers):

putting polymers into the pores of a PM part, soaking oil by capillary action into the pores of a PM part

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

shear strength