ENGN45_Quiz1-G
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School
City College of San Francisco *
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Course
45
Subject
Material Science
Date
Dec 6, 2023
Type
Pages
9
Uploaded by DBStanley
Quiz #1
Due
No due date
Points
10
Questions
10
Time Limit
None
Allowed Attempts
Unlimited
Instructions
Attempt History
Attempt
Time
Score
KEPT
Attempt 7 3 minutes
10 out of 10
LATEST
Attempt 7 3 minutes
10 out of 10
Attempt 6 8 minutes
8 out of 10
Attempt 5 11 minutes
9.5 out of 10
Attempt 4 15 minutes
9.5 out of 10
Attempt 3 8 minutes
8.5 out of 10
Attempt 2 27 minutes
7.83 out of 10
Attempt 1 46 minutes
9.33 out of 10
Submitted Jan 20 at 3:05pm
This quiz covers the Introduction to Materials and Atomic Bonding.
Take the Quiz Again
1 / 1 pts
Question 1
What is an amu? (Select all that apply.)
A unit of mass that is approximately equal to the mass of a proton or a
neutron.
Correct!
Correct!
A unit of mass equal to approximately 1.66 x 10^(-24) grams. Correct!
Correct!
The mass of one twelvth of a carbon12 atom. Correct!
Correct!
amu stands for atomic mass unit. Correct!
Correct!
All of the answers are correct.
1 / 1 pts
Question 2
What is the relationship between the bonding force and the bonding
energy of an atomic bond?
The force is always greater than the energy. The energy is equal to the derivative of the force with respect to the
separation distance.
The energy is always greater than the force.
The force is equal to the derivative of the energy with respect to the
separation distance.
Correct!
Correct!
Yes, this is right. The mathematical relationship looks like:
F = dE/da
This relationship is the same for all three types of primary atomic
bonds and also for secondary atomic bonds.
1 / 1 pts
Question 3
The radius ratio of the elements in an ionic bond will be an important
factor in determining which of the following?
The type of defects present in the material. The melting temperature of the material. The type of atomic bonding present in the material. The crystalline structure of the material. Correct!
Correct!
Yes. Also, the need to maintain charge neutrality will also be a
determining factor.
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The radius ratio, along with the need to maintain charge
neutrality will be the determining factors for the material's crystal
structure.
1 / 1 pts
Question 4
Pick the answer which, if put on the end of this sentence, makes it true:
The relationship between bonding force and bonding energy for the
different types of atomic bonding…
looks like: E = dF/da
is different for the three types of primary bonding but is the same for all
the types of secondary bonding.
depends on the types of materials that are being bonded. is the same for the three types of primary bonding but different for the
secondary bonding forces.
is the same for all the types of bonding, both primary and secondary. Correct!
Correct!
Yes. The bond force curve and the bond energy curve have the
same general shape for all types of atomic bonding.
1 / 1 pts
Question 5
Pick the best answer that is true for metallic bonding.
Metallic bonding is non-directional and therefore maximizes packing
efficiency.
Correct!
Correct!
Exactly!
Metallic bonding takes place between elements whose
electronegativities are far apart.
Metallic bonding maximizes packing efficiency. Metallic bonding is non-directional. 1 / 1 pts
Question 6
What is a material property? (Select all that apply.)
An inherent characteristic of a material. Correct!
Correct!
Correct!
Correct!
A measurement that indicates how the material will respond to a
stimulus.
A standard definition created by a professional organization to quantify
material behavior.
Correct!
Correct!
1 / 1 pts
Question 7
What is involved in the engineering of materials?
The processing and the applications for a material. Correct!
Correct!
The processing of a material will determine its structure which in turn will determine its properties which in turn will determine the applications for which it can be used. The processing and the applications are considered to be the engineering of materials. The structure and the properties are considered to be the science of materials.
Selecting a material for a specific application or determining an
application a specific material can be used for.
Understanding the properties of a material. Determining the basic structure of a material. The processing that a material is subjected to.
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1 / 1 pts
Question 8
Material properties fit into six broad categories based on their response
to some type of stimulus. Match the category to the stimulus.
Mechanical properties
measure a material's
response to
a load (force). (e.g. tensi
Correct!
Correct!
Thermal properties
measure a material's
response to
heat. (e.g. melting tempe
Correct!
Correct!
Electrical properties
measure a material's
response to
a voltage or an electric fi
Correct!
Correct!
Deteriorative properties
measure a material's
response to
environmental factors in
Correct!
Correct!
Magnetic properties
measure a material's
response to
a magnetic field (e.g. pe
Correct!
Correct!
Optical properties
measure a material's
response to
electromagnetic or light Correct!
Correct!
1 / 1 pts
Question 9
Microscopic scale structure is on the order of:
nano-meters micro-meters meters 0.1 nano- meters milli-meters Correct!
Correct!
Yes, this is on the order of 10
meters which is considered to be
structure on the microscopic scale. (It can be observed with a
microscope.)
-3
1 / 1 pts
Question 10
To what does the science of materials refer?
The processing of a material. The applications that a material is used for. The structure and properties of a material. Correct!
Correct!
Exactly!
The basic structure of a material. A material's properties.
The science of materials refers to a material's basic structure
and its properties. The properties of a material will be a direct
consequence of its structure.
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