Chapter 11 - Casting Processes

Front

Which one of the following casting processes is the most widely used: centrifugal casting, die casting, investment casting, sand casting, shell casting?

Back

sand casting

Front

In sand casting, the volumetric size of the pattern is________the cast part

Back

bigger than

Front

Silica sand has which one of the following compositions: Al₂O₃, SiO, SiO₂, SiSO₄?

Back

SiO₂

Front

For which one of the following reasons is a green mold named:
- green is the color of the mold
- moisture is contained in the mold
- mold is cured
- mold is dry

Back

moisture is contained in the mold

Front

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?

Back

upward force = Wₘ - Wc

Front

Shell molding is best described by which one of the following: casting operation in which the molten metal has been poured out after a thin shell has been solidified in the mold, casting process in which the mold is a thin shell of sand bonded by a thermosetting resin, sand-casting operation in which the pattern is a shell rather than a solid form, casting operation used to make artificial sea shells?

Back

casting process in which the mold is a thin shell of sand bonded by a thermosetting resin

Front

Investment casting is also known by which one of the following names: fast-payback molding, full-mold process, lost-foam process, lost-pattern process, lost-wax process?

Back

lost-wax process

Front

In plaster mold casting, the mold is made of which one of the following materials: Al₂O₃, CaSO₄·H₂O, SiC, SiO₂?

Back

CaSO₄·H₂O

Front

Cupolas are furnaces used to melt which of the following metals: aluminum, cast iron, steel, zinc?

Back

cast iron

Front

A misrun is which one of the following defects in casting?
Options:
globules of metal becoming entrapped in the casting,
metal is not properly poured into the downsprue,
metal solidifies before filling the cavity,
microporosity,
"pipe" formation

Back

metal solidifies before filling the cavity