2020APS110TestMCQSOLUTIONS
pdf
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School
University of Toronto *
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Course
110H!
Subject
Mechanical Engineering
Date
Dec 6, 2023
Type
Pages
24
Uploaded by LieutenantTankFox40
CONCEPT
VERSION
UNIVERSITY
OF
TORONTO
FACULTY
OF
APPLIED
SCIENCE
AND
ENGINEERING
Multiple
Choice
Assessment
Due:
October
29t
2020
by
2359
Eastern
Daylight
Time
(Toronto)
First
Year
APS110
-
INTRODUCTORY
CHEMISTRY
AND
MATERIALS
SCIENCE
Exam
Type:
X
(Open
Book;
Internet,
if
not
communicated
/posted
during
test:
no
communication
with
others)
Examiners:
M
Kortschot,
CQ
Jia,
SD
Ramsay
Note:
as
thes
13
a
final
assessmend,
late
submessions
wnll
not
be
accepled.
This
means
that
if
you
do
not
submit
your
responses
successfully
to
Crowdmark
by
the
deadline
you
will
not
be
able
to
submit
and
you
will
need
Lo
submsl
an
official
petilron.
Therefore,
il
+s
higyhly
advisable
thal
you
make
plans
to
complete
and
submit
your
final
responses
2-3
hours
early.
Instructions:
¢
You
must
correctly
indicate your
test
version
code
on
your
the
Microsoft
[orm.
If
you
do
not,
or
[ill
this
in
incorrectly,
vour
[inal
assessment
will
not
be
graded.
¢
Answer
all
questions.
e
Fill
in
the
answers
on
the
Microsoft
Form.
Concept
version
Page
1
of
24
.
oL
Af:
/.09~
/"
+
§HOwm
€
:
4o
(o
)P«
.
yo(w").
21
.
gs(10*)P
<=
YO
)gqo
6(!)«
s
65
NMN&
1.
Which
of
the
following
are
the
correct
units
for
strain?
(a)”Dimensionless
b)
mm
(¢)
m
(d)
inches
Correct
answers:
(a)/
.
The
Abraham
Lincoln
DBridge,
spanning
the
Ohio
River
from
Louisville,
Kentucky
to
Jeffersonville,
Indiana,
is
designed
with
ex-
pansion
joints
to
provide
for
1.04m
of
linear
thermal
expansion
along
the
length
of
the
bridge.
Consider
if
this
bridge
had
been
built
with-
out
these
expansion
joints
and
1.04m
of
linear
expansion
occurred,
but
the
bridge
was
rigidly
[ixed
at
both
ends,
preventing
this
expan-
sion.
If
the
elastic
modulus
of
the
concrete
in
the
bridge
is
40
GPa
and
the
compressive
fracture
strex
of
the
concrete
is
28
MPa,
what
stress
would
you
expect
to
be
imposed,
_on
the
bridge?
LTo'tc.\
S
éqOM
OJ\’/
(Expansion
joint
data
from
www.rjwatson.com/Projects/ohio-river-
bridge-rjw-linger-joints,
accessed
October
25,
2020,
Image
[rom
Censusdata
at
English
Wikipedia,
commons.wikimedia.org/wiki/
File:2016
WIKI_AbrahamLincolnBridgeLouKYJunel2.jpg,
CC
BY-SA
4.0
creativecommons.org/licenses/by-sa/4.0,
via
Wikimedia
Commons.))
@
MPa
5]
21
MPa
(c)
3MPa
(d)
6
GPa
Correct
answers:
(a)
Concept
version
Page
2
of
24
—
/_—:;—
’
)
&/
Cwol
T
SR
o
IRCE
Y
-
[
]
_
O.D’L
-
b
PpT7xcC
7
3.
T'wo
ropes
are
cut,
the
first
to
1m
in
length
and
the
second
to
3m
in
length.
Both
pieces
of
rope
are
then
stretched
by
2
cm.
What
will
2
the
ratio
of
the
strain
in
the
first
to
the
strain
in
the
second
be?
b
Ore
‘g'
-
qual
because
strain
is
sample
size
independent
-
3
?
Z(u)'l)
(c)
0.33
)
2
Correct
answers:
(a)
\_/
-’)
4.
Referring
to
the
figure
below,
noting
that
both
cylinders
are
made
from
the
sai
aterjal,
which
of
the
following
statements
are
correct
cvlinders
®A”
and
"B"?
“
AII
"
B”
lo
RCLLDR
(a)
ABoth
cylinders
have
the
ame
stress
and
the
same
strain
F
F
.
:
E
(b)
Both
cylinders
have
the
|
same
stress
only
=
(c)
Both
cylinders
have
the
same
strain
only
Iy+Al
(d)
Ir‘npossablg
to
detgrmme
-
from
information
provided
PO
"
s
~
Cp
-
LY
4
Correct
answers:
(a)
Concept
version
Page
3
of
24
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5.
A
sample
of
a
heavily
cold
worked
316L
stainless
steel
is
heated
for
several
hours
in
a
furnace
at
1065°C.
The
sample
is
then
allowed
to
¢
o
room
temperature.
Relative
to
the
value
before
the
heat
treatment,
the
Young’s
modulus
after
this'
heat
t.roat.menét_swill
be
which
of
the
following?
Sow
Heat
Less
v
—=ne.ohen
-
ok
S
5)
Greater
than
(‘l'b
Qron
Size
A
b
botend
(¢
Spmly
m
v
?
(d)
Unable
to
determine
with
information
provided
Correct
answers:
(a)
6.
A
sample
of
a
heavily
cold
worked
316L
stainless
steel
is
heated
for
several
hours
in
a
furnace
at
1065°C.
The
sample
is
then
allowed
to
cool
to
room
temperature.
Relative
to
the
value
before
the
heat
treatment,
the
vield
strength
after
this
heat
treatment,
will
be
which
of
the
following?
I/’G‘;'i'o'(
et
T
a)
Less
than
Lsy,
Chy
¥Rz
Ghwe
(b)
Greater
than\/
Lp
grew
she
b
Ly
Gudots
f
1>
6)'*9“,5%5'4\
The
same
as
(d)
Unable
to
determine
with
information
provided
Correct
answers:
(a)
7.
A
sample
of
a
heavily
cold
worked
316L
stainless
steel
is
heated
for
several
hours
in
a
furnace
at
1065°C.
The
sample
is
then
allowed
to
cool_to
room
temperature.
Relative
to
the
value
before
the
heat
treatment,
the
plastic
deformation
at
fracture
after
this
heat
treat-
}
N
.
.
.
.
?
.
)
ment
will
be
which
of
the
following’
ol
NN
%
D
*"""U
v
Greater
than
ess
than
The
same
as
(d)
Unable
to
determine
with
information
provided
Correct
answers:
(a)
Concept
version
Page
4
of
24
8.
Referring
to
the
stress-strain
curve
below,
which
of
the
following
is
closest
to
the
value
for
the
yield
strength?
RS
R
R
R
LA
A
AN
AN
LR
RN
LA
AR
o)
@
=
e
=
o~
[
-
~
=]
>
=}
=
=
=
)
»
-
c
o
(=]
=
oD
(=1
60
MPa
)
150
MPa
(¢)
300MPa
Concept
version
Page
5
of
24
9.
Referring
to
the
stress-strain
curve
below,
which
of
the
following
is
closest
to
the
value
for
the
ultimate
tensile
strength?
33
-
%_‘-\\
%
4
0
:
:
:
:
i
—
2504
.
-
0
.Fo,e
4
.
(A
:
Rond*j
-
200
(
[
-]
—
-
Dow»
-
c
=
L
———
—
100
-
—
—4
4
e
RS
RREES
RN
RR
AR
AR
RN
RAR
RS
AR
LA
AR
AR
RRRAR
C
™
2]
-
O
-~
@
[~
o
™
o~
[
C
]
o
o
o
=}
-]
o
-
o
-
-
-
-
o
o
o
o
o
o
o
o
o
o
o
o
S
(¢)
200MPa
(d)
260
MPa
Correct
answers:
(a)
/
Concept
version
Page
6
of
24
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10.
Referring
to
the
stress-strain
curve
below,
which
of
the
following
is
closest
to
the
value
for
the
fracture
strength?
=1
!
3
-
i
"
i
—
2504
-
—
-
-
2004
[
-]
—
g
-—
©
1504
—
100
-
-
—
—4
4
e
RS
RREES
RN
RR
AR
AR
RN
RAR
RS
AR
LA
AR
AR
RRRAR
C
-
g
"
-
~
@
[~
o
-
o~
(¢
[
=)
o
o
=Y
=
>
=
S
=)
-
-
-
-
c
o
o
o
o
o
o
o
o
o
o
o
o
S
15
MPa
5250
MPa
(c)
330
MPa
(d)
230MPa
Correct
answers:
(a)
Concept
version
Page
7
of
24
11.
Referring
to
the
stress-strain
curve
below,
which
of
the
following
is
closest
to
the
value
for
the
total
strain
at
fracture?
LLAL)
-
-
-
=
oo
lll%llll?llllallll?llll%llll
N
»
G
(WPa)
—_
un|lu|illllillll||nl
TTTY
OOIZZ
g
8
©
¢
o
@9
llllillll
IR
ERRRRERARRRRRRRRERAA]
=
8
2
=
R
o123
/
5)
0.120
(¢)
0.100
(d)
0.001
Correct
answers:
(a)
Concept
version
Page
8
of
24
12.
Referring
to
the
stress-strain
curve
below,
which
of
the
following
is
closest
to
the
value
for
the/plast;ic
strain
at
fracturc'g
=
——
-
300~
-
—
250+
-
—
-
-
200
[
-]
—
&
-—
©
1504
—
1003
-
-
—
—
4
0
TR
ey
vrrr
gy
nyresnnyrngrrsngprryrgryyegrerngpeeenmy
C
-
g
2]
-
~
@
&
o
-
o~
"
c
o
=1
(=)
o
=}
=1
o
o
o
-
-
-
-
o
o
o
o
o
o
o
o
=
o
[~
o
o
(-
OlL
(a
23
&=
cowt
be
s,
s
s
Tastal,
(d)
0.001
Correct
answers:
(b)
Concept
version
Page
9
of
24
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13.
Referring
to
the
stress-strain
curve
below,
which
of
the
following
is
closest
to
the
value
for
the
elastic
strain
recovered
at
fracture?
M
0
s
?°°§
§
1505
o0
c-llll;llll
IR
ERRRRERARRRRRRRRERAA]
lll'lllll;llll;lllllllll.
T
€
-~
000}
(a)
0.000
(b)
0.12
(c)
0.003
(d)
0.123
Correct
answers:
(c)
Concept
version
Page
10
of
24
flcc‘*h'u‘r,
s
s
losast
bt
“)
zw'o“
14.
A
sample
of
hypothetical
metal
having
the
stress-strain
behaviour
shown
below
is
loaded
to
280
MPa.
If
the
3
1as
an
initial
length
of
1
m,
which
of
the
following
is
¢
to
the
length
of
this
sample
while
this
load
is
applied?
)
Liliiialiind
i
i
:
!
!
Trrrprrreyerrryervrgprerrgyennegy
vl
o)
~
rect
answers:
'
Concept
version
Page
11
of
24
15.
A
sample
of
hypothetical
met;
Ll
1aving
the
stress-strain
behaviour
shown
below
is
loaded
to
280
MPa.
If
the
sample
has
an
initial
length
of
1
m,
which
of
the#llowing
is
closest
to
the
length
of
this
sample
upon
unloading?
-
/
-
“'
—
©
150+
1007
0j'$ll
llll]llll]llllillllillll]lllllllll
TTTTITITTITTTT
S
s
&
s
2
£
&
S
e
-
o
o
o
o
(=]
o
o
o
o
o
o
o
€
v
O
OC3
(a)
1.07m
(b)
1m
(¢c)
1.26m
(d)
1.19m
Correct
answers:
(a)
Concept
version
Page
12
of
24
Your preview ends here
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]
VA
l'JOO"(D-j
L™
‘7W"‘0'
h*
N7
x>
L
16.
You
have
designed
a
lovely
desk
similar
to
the
one
shown
in
the
figure
below.
The
thickness
is
82
mm,
the
width
is
750
mm
and
the
‘
unsupported
span
is
1300
mm.
You
have
made
the
desk
from
Poplar
brf
Qu
‘F
>
Lhaving
a
bending
strength
of
68
MPa.
You
are
very
protective
of
this
A
-
-3
)
desk,
however,
when
you
step
away
to
eat
a
healthy
meal,
one
of
m
our
family
members
stands
in
the
middle
of
the
unsupported
span
.
Y
o
)
e
PD
.
I
3(4.'?::(qu|30>«!0
D
to
reach
up
to
hang
a
picture
on
the
wall.
If
your
family
member
g
O
A
.
T
=—
|
F*
weighs
63kg
will
the
desk
break?
2
(st
52w
.
N
22"
[igy-931)
N
ok
9.81
7,
.
T
24
men
L=
13m
ou
L
k¥
d
=
0.081m
/7
rg
alh
|
>
gs\fi.xl\(l.'s)
———
0
_—
G-=
>
0.7).
(O.ogz)t
|
/
2.4(10%)
Pa
240
kfa.
<
6
¥
Mfa
fn
(¢c)
Unable
to
determine
from
the
information
provided
Correct
answers:
(a)
Concept
version
Page
13
of
24
rce
Vs
[ishr
pack
N
ppet
APF
*Vc
\
F
=
o
=(W(het)
FUL
gt
=
n
T
—Zifi91
(l:lxm)(“‘>
yz=
2o
~m
3
3
|
=
o7w
nz:
o7a(l.236-1)(LW)
@
9
)Ph
ove
["}’3
™
(zwtm-3>
3
j
#P
F
-
T
—
v
A
17.
A
local
restaurant
is
running~a
marketing
promotion
to
increase
busi-
ness
through
their
take-out
business
during
the
pandemic.
They
have
:
c
filled
a
large
box
with
table
tennis
balls
and
the
challenge
is
to
guess
T
.3H'
?q
"
.
o
:
I
|
the
number
of
balls
in
the
box.
To
make
this
exciting,
the
restaurant
I
has
packed
the
table
tennis
balls
as
tightly
as
possible
into
the
bo
~
Fe
=
n=4
If
the
box
has
dimensions
of
1.2m
x
1.4m
x
1.2m,
how
many
balls
are
in
the
box?
V
Nn:
4
Poxr
.
-
.
N
vy
fio:_
-
i
V*‘*
al’
jA
bqf.‘mmm
>
SO
nTOTq‘
-—‘aall
(/(c)
,;(,ell
('?n
-
Voo
=
£
hw
|
hetu—
b"-zfi
)
&2)(!.«)(!-3_)‘.-
Y
(zfi-zo(fo"))s
-
445
('0“>
=4S
(10")
va‘
Ob”
-
Q.s
Q=
21’2’2
n
[1.4m
R
=
fle("’-a
2
(a)
45,
000
57
800
(¢)
41,
000
(d)
5,
600
Correct
answers:
(a)
Concept
version
Page
14
of
24
18.
Stress
is
described
as
being
sample
size
independent
for
which
of
the
following
reasons?
Because
stress
is
force
per
unit
area,
so
larger
samples
will
also
require
larger
force
to
achieve
the
same
stress.
(b)
Because
stress
is
a
dimensionless
quantity™
(c)
Because
stress
is
always
the
same,
regardless
of
how
many
times
you
repeat
a
test
96
(d)
None
of
these
options.
=~
Correct
answers:
(a)
E
19.
Young’s
modulus
is
described
as
being
structure
independent
for
which
of
the
following
reasons?
Jecause
Young's
modulus
relates
to
a
specific
bond
typey
which
does
not
change
with
microstructural
changes
o
(b)
Because Young's
modulus
is
a
dimensionless
quantity
(¢)
Because
Young’s
modulus
does
not
depend
on
the
sj#e
of
a
sam-
ple
being
tested
(d)
Nomne
of
these
options.
Correct
answers:
(a)
20.
The
stored
elastic
strain
energy
in
temperefl
glass
can
be
roughly
related
to
which
of
the
following?
&f
he
surface
energy
liberated
during
fractyire
(b)
The
strain
energy
surrounding
dislocations
in
the
glas
(¢)
The
thermal
energy
used
to
produce
the
g
(d)
Nomne
of
these
options.
—ilem
Correct
answers:
(a)
Cof
&
a
-
Concept
version
Page
15
of
24
r
/
7R
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¥Z
JO
91
oded
uorstoa
jdoouo))
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22.
The
ervstalline
imperfection
illustrated
in
the
figure
below
is
which
of
the
following?
Vacaon
¢
ZOD
‘
(a)
Vacancy
)
Grain
boundary
(¢)
Interstitial
atom
(d)
Dislocation
Correct
answers:
(a)
Concept
version
Page
17
of
24
23.
24.
Which
of
the
following
is
the
best
explanation
for
the
reason
that
a
few
atoms
in
a
solid
at
room
temperature
may
have
enough
kinetic
energy
to
break
free
of
their
nearest
neighbour
atoms,
while
the
majority
are
held
in
place
by
bonds?
crc
is
a
distribution
of
energies
for
a
population
of
atoms
|/
Crystalline
imperfections
mean
that
there
will
randomly
be
some
missing
bonds
(¢)
This
occurs
only
to
impurity
atoms
(d)
These
result
from
manufacturing
defects
Correct
answers:
(a)
If
a
single
unit
of
a
BCC
material
was
sliced
as
shown
in
the
figure
below,
which
of
the
following
would
correctly
describe
the
fraction
of
the
area
of
the
sliced
plane
covered
by
atoms?
_
2.
72t
(a)
6
(b)
15
;/ifr
)
(c
(d
32
None
of
these
options.
Correct
answers:
(a)
Concept
version
Page
18
of
24
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25.
Referring
to
the
unit
cell
below,
how
many
octahedral
interstitial
sites
have
centers
residing
on
the
blue
plane?
-
.
.
CQV\‘\'C
/
NoV
o~
¥
\
e
-
B
B
B
B
B
B
R
rcc
Correct
answers:
(a)
Concept
version
Page
19
of
24
26.
Referring
to
the
unit
cell
below,
how
many
octahedral
interstitial
sites
have
centers
residing
on
the
orange
line?
(a
b))
0
(c)
2
(d)
3
Correct
answers:
(a)
Concept
version
Page
20
of
24
27.
Referring
to
the
unit
cell
below,
how
many
octahedral
interstitial
sites
have
centers
residing
within
the
unit
cell,
exactly
half
way
between
the
blue
and
green
planes?
o
Correct
answers:
(a)
Akersect
Concept
version
Page
21
of
24
Your preview ends here
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28.
There’s
a
lot
going
on
in
the
figure
below.
Take
a
moment
to
work
it
out.
The
solid
black
directions
are
normal
to
the
planes.
Planes
1
and
2
have
atoms
residing
in
either
cube
corners
or
cube
face-centers.
Which
crystal
structure
is
illustrated
here?
vy
HeclP
ABA
o
P
(a)
HCP
—>
ABAB
(b)
FCC
>
J36c
AAC
(¢)
BCC
)
Simple
Cubic
Correct
answers:
(a)
Concept
version
Page
22
of
24
Your preview ends here
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29.
Two
parallel
planes
of
atoms
are
sketched
below,
viewed
normal
to
the
planes.
The
red
plane
is
on
top
of
the
blue
plane
and
a
grey
plane,
with
no
atoms,
is
sketched
and
resides
exactly
half
way
between
the
red
and
blue
planes.
The
arrow
identifies
a
point
on
the
grey
plane.
What
is
the
coordination
(with
all
atom
colors)
of
the
point
indicated
with
the
arrow?
Correct
answers:
(a)
Concept
version
Page
23
of
24
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30.
Referring
to
the
figure
below,
noting
that
one
of
the
curves
was
from
a
brass
sample
tested
in
tension,
which
are
the
two
materials
that
most
likely
produced
the
other
two
curves?
s"‘
ew
QW
'S
“
——
No*"‘g
‘hu»‘\-
‘A
/
~&
g
-
Simi
ol
o
ratel
)
'SLO"H
1
be
ceroa~—mC
O
grp_sS/oH
C(,I'd
.
in
compression,
polvmer__
Ceramic
in
tension,
polymer
|
e——
B11ttlc
polymer,
ceramic
in
compression
(d)
Brittle
polymer,
ductile
polymer
Correct
answers:
(a)
Instructions:
e
Congratulations,
you've
reached
the
end
of
the
assessment!
¢
Remember
to
submit
your
answers
to
Microsoft
Forms.
Concept
version
Page
24
of
24
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