© Mikell P. Groover 2013
Chapter 7 FUNDAMENTALS OF METAL CASTING
Multiple Choice Quiz
There are 25 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.
7.1
Casting is a process in which molten metal flows into a mold where it solidifies in the
shape of the mold cavity; the term casting also applies to the part that is made by this
process: (a) true or (b) false?
7.2
A factory that performs casting processes is called which of the following (one best
answer): (a) casting plant, (b) foundry, (c) ingot-making plant, (d) metal working plant, or
(e) molding plant?
7.3
Sand casting is which of the following types of casting process: (a) expendable mold or (b)
permanent mold?
7.4
The upper half of a sand-casting mold is called which one of the following: (a) cope, (b)
drag, (c) flask, or (d) pattern?
7.5
In casting, a flask is which one of the following: (a) beverage bottle for workers who
perform casting, (b) box which holds the cope and drag, (c) container for holding liquid
metal, or (d) metal which extrudes between the mold halves?
7.6
The pattern that determines the geometry of the casting in expendable mold processes is
usually made (a) oversized, (b) the same size, or (c) undersized relative to the dimensions
of the casting?
7.7
In casting processes, a runner is which one of the following: (a) channel in the mold
leading from the downsprue to the main mold cavity, (b) worker who moves the molten
metal to the mold, or (c) vertical channel into which molten metal is poured into the mold?
7.8
The internal surfaces of a casting are determined during the casting process by means of
which one of the following: (a) core, (b) gating system, (c) parting line, (d) pattern, or (e)
sprue?
7.9
Heating a metal from room temperature to pouring temperature in a casting operation
depends on all of the following properties except which one: (a) density, (b) heat of fusion,
(c) melting temperature, (d) specific heat, or (e) thermal expansion?
7.10
Turbulence during pouring of the molten metal is undesirable for which of the following
reasons (two best answers): (a) it causes discoloration of the mold surfaces, (b) it dissolves
the binder used to hold together the sand mold, (c) it increases erosion of the mold surfaces,
(d) it increases the formation of metallic oxides that can become entrapped during
solidification, (e) it increases the mold filling time, and (f) it increases total solidification
time?
7.11
Two important relationships that determine the flow of molten metal in casting are which
of the following (two correct answers): (a) Bernoulli’s theorem, (b) Chvorinov’s rule, (c)
continuity law, (d) flow curve, (e) Hooke’s law, or (f) Ohm’s law?
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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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© Mikell P. Groover 2013
7.12
Total solidification time is defined as which one of the following: (a) time between pouring
and complete solidification, (b) time between pouring and cooling to room temperature, (c)
time between solidification and cooling to room temperature, or (d) time to give up the heat
of fusion?
7.13
During solidification of an alloy when a mixture of solid and liquid metals is present, the
solid-liquid mixture is referred to as which one of the following: (a) eutectic composition,
(b) ingot segregation, (c) liquidus, (d) mushy zone, or (e) solidus?
7.14
The empirical relationship that determines total solidification time in casting is known as
which one of the following: (a) Bernoulli’s theorem, (b) Chvorinov’s rule, (c) continuity
law, (d) flow curve, (e) Hooke’s law, or (f) Ohm’s law?
7.15
According to the empirical relationship in the previous question, total solidification time is
proportional to which one of the following quantities: (a) (A/V)n, (b) Hf, (c) Tm, (d) V, (e)
V/A, or (f) (V/A)2; where A = surface area of casting, Hf = heat of fusion, Tm = melting
temperature, and V = volume of casting?
7.16
Solidification shrinkage in casting is defined as which one of the following: (a) liquid
contraction during cooling prior to solidification, (b) liquid contraction during cooling
and solidification, (c) contraction during the phase change from liquid to solid, or (d)
thermal contraction of the solidified casting during cooling to room temperature.?
7.17
Metal inserts in the walls of a sand mold cavity designed to remove heat from the molten
metal more rapidly than the surrounding sand are called which one of the following: (a)
external chills, (b) internal chills, (c) pipes, or (d) sprues?
7.18
A riser in casting is described by which of the following (three correct answers): (a) an
insert in the casting that inhibits buoyancy of the core, (b) gating system in which the sprue
feeds directly into the cavity, (c) metal that is not part of the casting, (d) source of molten
metal to feed the casting and compensate for shrinkage during solidification, and (e) waste
metal that is usually recycled?
7.19
In a sand-casting mold, the V/A ratio of the riser should be (a) equal to, (b) greater than, or
(c) smaller than the V/A ratio of the casting itself?
7.20
Which of the following riser types are completely enclosed within the sand mold and
connected to the main cavity by a channel to feed the molten metal (two correct answers):
(a) blind riser, (b) open riser, (c) side riser, and (d) top riser?
Excerpts from this work may be reproduced by instructors for distribution on a not-for-profit basis for testing or instructional purposes only to
students enrolled in courses for which the textbook has been adopted. Any other reproduction or translation of this work beyond that permitted
by Sections 107 or 108 of the 1976 United States Copyright Act without the permission of the copyright owner is unlawful.