Hammer Final
Fracture of work part is less likely, isotropic mechanical properties, lower deformation forces required, more significant shape changes possible
Which of the following are advantages and characteristics of hot working relative to cold working (four correct answers):
Increase hardness, reduce brittleness, relieve stresses
Which of the following are the usual objectives of heat treatment (three best answers):
Steel
Martensite formation process is most effective with the following metal:
Flanging, hemming
Which of the following are variations of sheet-metal-bending operations (two best answers):
Bar and wire drawing, fleshless forging, impression die forging
Which of the following bulk deformation processes are involved in the production of nails (both nail head and nail body) for lumber construction (three best answers):
False
Flash in impression die forging serves no useful purpose and is undesirable because it must be trimmed from the part after forming:
Butt
Groove welds are most closely associated with which one of the following joint types?
Solidus
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 temperatures marks the end of melting:
Thread rolling
Most externally threaded fasteners are produced by which one of the following processes:
Cold working
Most sheet metalworking operations are performed as which one of the following:
Steel
On which one of the following metals is the treatment called austenitizing be performed:
Steel
Oxyfuel gas welding works best on which of the following metal
Extrusion, roll piercing, tube sinking
Production of pipes and tubes is associated with which of the following bulk deformation processes (three correct answers):
Martensite
The most important ingredient of a typical hardened steel is
Metal solidifies before filling the cavity
A misrun is which one of the following defects in casting:
Components can be designed with features to facilitate part mating, no special tools are required, parts can be assembled quickly
Advantages of snap fit assembly include which of the following (three best answers):
Increased
As sheet-metal stock hardness increases in a blanking operation, the clearance between punch and die should be
False
Die casting is suitable for low volume manufacturing.
Shear strength or tensile strength
The cutting force in a sheet-metal blanking operation depends on which mechanical property of the metal:
Blow molding
Use of a parison is associated with which one of the following plastic shaping processes:
Cogging, fullering, upsetting
Which of the following operations are closely related to open-die forging (three best answers):
Putting polymers into the pores of a PM part, Soaking oil by capillary action into the pores of a PM part
Impregnation refers to which of the following (two best answers):
Casting
Which of the following process is the best way to make a car engine block?
Blow molding, thermoforming
Which of the following processes are generally limited to thermoplastic polymers (two best answers)
The proportion of the total heat generated at the source that is received at the work surface
The heat transfer factor in welding is correctly defined by which one of the following descriptions:
Tempering
The treatment in which the brittleness of martensite is reduced is called which one of the following:
Polystyrene, Polyurethane
The two most common polymer foams are which of the following:
Time required for casting to solidify after pouring
Total solidification time is defined as which one of the following:
Heat affected zone (HAZ)
Weld failures occur mostly in which of the following zone?
Acetylene
Which of the following gas has the highest flame temperature during the oxyfuel gas welding?
Blow molding, rotational molding, vacuum thermoforming
Which of the following processes would be applicable to produce hulls for small boats (three best answers):
Cluster mill, four-high mill
Which of the following rolling mill types are associated with relatively small diameter rolls in contact with the work (two correct answers):
Progressive die
Which of the following stamping dies is the most complicated?
Exothermic welding or thermit welding
Which of the following welding process is the preferred method of joining the rails of railway?
GTAW
Which one of the following arc welding processes uses a nonconsumable electrode:
Chemically etch the surfaces to increase roughness for better adhesion of the filler metal
Which one of the following is not a function of a flux in brazing or soldering:
Lubricants, binders, and deflocculants
What are some of the ingredients usually added to the metallic powders during blending and/or mixing (three correct answers):
Outside rounded corners, side holes, threaded holes
Which of the following design features would be difficult or impossible to achieve by conventional pressing and sintering (three best answers):
Martensite
Which of the following is the most common metal state to which the steel is heated in order to start heat treatment?
Antimony, lead, silver, tin
Which of the following metals are used in solder alloys (four correct answers):
Aluminum, tin, zinc
Which of the following metals would typically be used in die casting (three best answers):
Thermal stability
Which of the following mold property is used to describe the ability to resist cracking on contact with molten metal in Sand Casting?