© Mikell P. Groover 2013
Chapter 8 METAL CASTING PROCESSES
Multiple Choice Quiz
There are 35 correct answers in this multiple choice quiz (some questions have multiple answers
that are correct). To achieve a perfect score on the quiz, all correct answers must be given. Each
correct answer is worth 1 point. Each omitted answer or wrong answer reduces the score by 1
point. Percentage score on the quiz is based on the total number of correct answers.
8.1
Which one of the following casting processes is the most widely used: (a) centrifugal
casting, (b) die casting, (c) investment casting, (d) sand casting, or (e) shell casting?
8.2
In sand casting, the volumetric size of the pattern is (a) bigger than, (b) same size as, or (c)
smaller than the cast part?
8.3
Silica sand has which one of the following compositions: (a) Al2O3, (b) SiO, (c) SiO2, or (d)
SiSO4?
8.4
For which one of the following reasons is a green mold named: (a) green is the color of the
mold, (b) moisture is contained in the mold, (c) the mold is cured, or (d) the mold is dry?
8.5
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: (a) downward force = Wm + Wc, (b)
downward force = Wm - Wc, (c) upward force = Wm + Wc, or (d) upward force = Wm - Wc?
8.6
Which of the following casting processes are expendable mold operations (four correct
answers): (a) centrifugal casting, (b) die casting, (c) investment casting, (d) low pressure
casting, (e) sand casting, (f) shell molding, (g) slush casting, and (h) vacuum molding?
8.7
Shell molding is best described by which one of the following: (a) casting operation in
which the molten metal has been poured out after a thin shell has been solidified in the
mold, (b) casting process in which the mold is a thin shell of sand bonded by a
thermosetting resin, (c) sand-casting operation in which the pattern is a shell rather than a
solid form, or (d) casting operation used to make artificial sea shells?
8.8
The expanded polystyrene casting process uses a mold of sand packed around a
polystyrene foam pattern that vaporizes when the molten metal is poured into the mold:
(a) true or (b) false?
8.9
Investment casting is also known by which one of the following names: (a) fast-payback
molding, (b) full-mold process, (c) lost-foam process, (d) lost-pattern process, or (e)
lost-wax process?
8.10 In plaster mold casting, the mold is made of which one of the following materials: (a)
Al2O3, (b) CaSO4-H2O, (c) SiC, or (d) SiO2?
8.11 The Antioch process is similar to plaster-mold casting but uses a mixture of sand and plaster
to make the mold: (a) true or (b) false?
8.12 Which of the following qualifies as a precision-casting process (two correct answers): (a)
ingot casting, (b) investment casting, (c) plaster-mold casting, (d) sand casting, and (e) shell
molding?
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© Mikell P. Groover 2013
8.13 Which of the following are metals commonly cast in permanent mold casting (three best
answers): (a) aluminum, (b) brass, (c) gold, (d) magnesium, (e) nickel, (f) steel, and (g)
tungsten?
8.14 Which of the following casting processes are permanent mold operations (two correct
answers): (a) centrifugal casting, (b) expanded polystyrene process, (c) sand casting, (d)
shell molding, (e) slush casting, and (f) vacuum molding.
8.15 In hot-chamber die-casting machines, molten metal is poured into an unheated chamber
from an external melting container, and a piston is used to inject the metal under high
pressure into the die cavity: (a) true or (b) false?
8.16 Which of the following metals would typically be used in die casting (three best answers):
(a) aluminum, (b) cast iron, (c) steel, (d) tin, (e) tungsten, and (f) zinc?
8.17 Which of the following are advantages of die casting over sand casting (four best answers):
(a) better surface finish, (b) closer tolerances, (c) higher melting temperature metals can be
cast, (d) higher production rates, (e) larger parts can be cast, and (f) mold can be reused?
8.18 Which of the following names are applied to a process in which a molten metal is poured
into a heated lower die, and the upper die is closed to create the mold cavity only after
solidification begins (two correct answers): (a) liquid-metal casting, (b) liquid-metal
forging, (c) rheocasting, (d) squeeze casting, or (e) thixocasting?
8.19 Which one of the following is the name of the casting process in which molten metal is
poured into a rotating mold to produce a tubular part: (a) centrifuge casting, (b)
semicentrifugal casting, or (c) true centrifugal casting?
8.20 Cupolas are furnaces used to melt which of the following metals (one best answer): (a)
aluminum, (b) cast iron, (c) steel, or (d) zinc?
8.21 A misrun is which one of the following defects in casting: (a) globules of metal becoming
entrapped in the casting, (b) metal is not properly poured into the downsprue, (c) metal
solidifies before filling the cavity, (d) microporosity, and (e) "pipe" formation?
8.22 An irregularity in the surface of the casting caused by erosion of the sand during pouring is
called which one of the following sand casting defects: (a) penetration, (b) sand blow, (c)
sand wash, or (d) scabs?
8.23 Which one of the following casting metals is most important commercially: (a) aluminum
and its alloys, (b) bronze, (c) cast iron, (d) cast steel, or (e) zinc alloys?
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students enrolled in courses for which the textbook has been adopted. Any other reproduction or translation of this work beyond that permitted
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