© Mikell P. Groover 2013
Chapter 4 PHYSICAL PROPERTIES OF MATERIALS
Multiple Choice Quiz
There are 19 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.
4.1
The specific gravity of a material is the ratio of its density relative to the density of water: (a)
true or (b) false?
4.2
Which one of the following metals has the lowest density: (a) aluminum, (b) copper, (c) iron,
(d) magnesium, or (e) tin?
4.3
The strength-to-weight ratio of a material is its yield strength divided by its density: (a) true
or (b) false?
4.4
The coefficient of thermal expansion measures the change in volume of a material per degree
of temperature: (a) true or (b) false?
4.5
The thermal expansion properties of polymers are generally (a) greater than, (b) less than, or
(c) the same as those of metals?
4.6
In the heating of most metal alloys, melting begins at a certain temperature and concludes at
a higher temperature. In these cases, which of the following temperatures marks the
beginning of melting: (a) liquidus or (b) solidus?
4.7
Volumetric specific heat is best defined by which one of the following: (a) capability of a
material to transfer heat through itself, (b) density divided by specific heat, (c) specific heat
divided by density, or (d) specific heat multiplied by density?
4.8
Which one of the following materials has the highest specific heat: (a) aluminum, (b)
concrete, (c) polyethylene, or (d) water?
4.9
The thermal diffusivity of a material is its thermal conductivity divided by its specific heat:
(a) true or (b) false?
4.10 Copper is generally considered easy to weld because of its high thermal conductivity: (a) true
or (b) false?
4.11 The mass diffusion rate dm/dt across a boundary between two different metals is a function
of which of the following variables (four best answers): (a) concentration gradient dc/dx, (b)
contact area, (c) density, (d) melting point, (e) thermal expansion, (f) temperature, and (g)
time?
4.12 Ohm’s Law is expressed by which one of the following relationships: (a) current = voltage
divided by resistivity, (b) current = voltage multiplied by resistance, (c) power = current
multiplied by voltage, (d) resistance = voltage multiplied by current, or (e) voltage = current
multiplied by resistance?
4.13 The electrical conductivity of a material is the reciprocal of its resistivity: (a) true or (b)
false?
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© Mikell P. Groover 2013
4.14 Which of the following pure metals is the best conductor of electricity: (a) aluminum, (b)
copper, (c) gold, or (d) silver?
4.15 A superconductor is characterized by which one of the following: (a) high conductivity, (b)
resistivity properties between those of conductors and semiconductors, (c) very low
resistivity, or (d) zero resistivity?
4.16 In an electrolytic cell, the anode is the electrode that is (a) positive or (b) negative.
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.