Chapter 11 - Casting Processes

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

• centrifugal casting

• die casting

• investment casting

• sand casting

• shell casting

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

• bigger than

• same size as

• smaller than

Silica sand has which one of the following compositions

• Al₂O₃

• SiO

• SiO₂

• SiSO₄

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

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

• downward force = Wₘ + Wc

• downward force = Wₘ - Wc

• upward force = Wₘ + Wc

• upward force = Wₘ - Wc

Which of the following casting processes are expendable mold operations (four correct answers)

• centrifugal casting

• shell molding

• investment casting

• sand casting

• vacuum molding

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

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

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

• Al₂O₃

• CaSO₄·H₂O

• SiC

• SiO₂

Which of the following qualifies as a precision-casting process (two correct answers)

• ingot casting

• investment casting

• plaster-mold casting

• sand casting

• shell molding