© Mikell P. Groover 2012
Chapter 12 GLASSWORKING
Multiple Choice Quiz
There are 15 correct answers in this multiple choice quiz. 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.
12.1 Which one of the following terms refers to the glassy state of a material: (a) crystalline, (b)
devitrified, (c) polycrystalline, (d) vitiated, or (e) vitreous?
12.2 Besides helping to preserve the environment, the use of recycled glass as an ingredient of
the starting material in glassmaking serves what other useful purpose (one answer): (a) adds
coloring variations to the glass for aesthetic value, (b) makes the glass easier to melt, (c)
makes the glass stronger, or (d) reduces odors in the plant?
12.3 Classifying the sand to be melted into molten glass before shaping is best defined by which
one of the following: (a) grouping the grains according to size, (b) mixing the batch to
achieve uniform distribution of grain sizes, (c) preheating the batch, (d) sorting the grains
according to color, or (e) washing the sand particles?
12.4 The charge in glassworking is which one of the following: (a) the duration of the melting
cycle, (b) the electric energy required to melt the glass, (c) the name given to the melting
furnace, or (d) the starting materials in melting?
12.5 Typical glass melting temperatures are in which of the following ranges: (a) 400C to
500C, (b) 900C to 1000C, (c) 1500C to 1600C, or (d) 2000C to 2200C?
12.6 Which one of the following processes or processing steps is not applicable in glassworking:
(a) annealing, (b) pressing, (c) quenching, or (d) sintering?
12.7 Glass spinning is a glassworking process used to produce which of the following types of
products: (a) filaments for fiber optics, (b) flat plates, (c) funnel-shaped components, (d)
lenses, or (e) tubes?
12.8 The press-and-blow process is best suited to the production of narrow-necked beverage
bottles, while the blow-and-blow process is more appropriate for producing wide-mouthed
jars: (a) true or (b) false?
12.9 Casting is a glassworking process used for (a) high production, (b) low production, or (c)
medium production?
12.10 The process used to produce flat plat glass in which molten glass flows onto the surface of
molten tin is called which one of the following: (a) casting, (b) Danner process, (c) float
process, (d) molten tin process, or (e) rolling?
12.11 Which one of the following processes is used to produce glass tubing: (a) Danner process,
(b) centrifugal casting, (c) pressing, or (d) spinning?
12.12 Centrifugal spraying is used to produce which one of the following: (a) continuous
filaments of glass, (b) glass powders, (c) glass wool, or (d) thin coatings of glass on the
surface of metal?
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© Mikell P. Groover 2012
12.13 If a glass part with a wall thickness of 5 mm (0.20 in) takes 10 minutes to anneal, how much
time would a glass part of similar geometry but with a wall thickness of 7.5 mm (0.30 in)
take to anneal (choose the one closest answer): (a) 10 minutes, (b) 15 minutes, (c) 20
minutes, or (c) 30 minutes?
12.14 A lehr is which of the following: (a) a lion's den, (b) a melting furnace, (c) a sintering
furnace, (d) an annealing furnace, or (e) none of the above?
12.15 Tempered glass is used for all but which one of the following products: (a) all-glass doors,
(b) automobile windshields, (c) safety glasses, (d) windows for tall buildings?
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.