ECET32700_Midterm_SOL_SP23
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Purdue University *
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327
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English
Date
Dec 6, 2023
Type
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8
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Purdue
University
-
School
of
Engineering
Technology
Midterm
examination
-
Spring
semester,
AY2022/23
ECET
32700
Instrumentation
and
Data
Acquisition
Design
Week
8
Thursday,
March
2",
2023
10:30AM
—
11:20AM
(50
mins)
Grissom
Hall
103
Instructor:
Dr.
Noori
Kim
Student
Name:
f
O
-
Purdue
Email
ID:
\U
\)(/
—
Instructions
to
students:
3;
4.
This
examination
comprises
Twenty-five
(25)
Questions
printed
on
Eight
(8)
pages
including
the
cover
page.
Each
question
is
worth
One
(1)
point
with
a
total
of
Twenty-five
(25)
points.
You
must
answer
ALL
the
questions.
Need
units
for
every
parameter.
All
answers
must
be
written
in
this
Exam
Question
Paper
At
the
end
of
the
examination,
Please
write
your
Purdue
email
ID
on
all
front
pages
and
any
additional
pages
attached
to
your
script
(if
any).
Failure
to
do
so
will
mean
that
your
work
will
not
be
identified.
The
University
reserves
the
right
not
to
mark
your
script
if
you
fail
to
follow
these
instructions.
Midterm
Examination
-
Spring.
AY2022/23
Page
|
of
8
A
*
Sensor/Trangd:
signal
Conditioning
|
Physical
Prenomenor
Computeror
|
User
Output
Display
—
Figure
1
A
general
DAQ
system
flow
diagram
(Questions
1-3)
1.
What
is
the
best
answer
for
A
in
Figure
1?
.
Processed
voltage
(@
Physical
signal
@.
Decimal
numbers
@.
Electrical
signal
v~
().
None
of
the
above
Your
answer:
2.
Which
is
not
relevant
to
the
NI
USB-6008
Device
Specifications?
@.
8
Single-ended
Analog
input
channels
2.
4
Differential
Analog
input
channels
(3.
ADC
type:
Successive
approximation
@.
Differential
analog
input
resolution:
4096
().
None
of
the
above
Your
answer:
3.
The
——
icon
enables
which
feature
on
the
Block
Diagram?
.
Execution
Highlighting
©.
Break
Points
.
Probes
@.
Step-
Into
or
Step-Over
Loop
().
None
of
the
above
Your
answer:
4.
Find
an
incorrect
pair
of an
SI
unit
constant
and
unit
(.
Hyperfine
transition
frequency
of
Cs:
9,192,631,770
Hz
@.
Speed
of light
in
vacuum:
299,792,458
m/s
@).
Plank
constant:
6.62607015
x
1034
J/Hz
@.
Elementary
charge:
1.602176634
x
10"
C
v
(.
Boltzmann
constant:
1.380649
x
10"
J/K
Your
answer:
-
¢f.
5.
“BLANK?”
captures
the
input
voltage
on
the
rising
edge
of
the
clock
signal,
and
holds
its
output
at
this
level.
After
this,
the
voltage
signal
is
no
longer
continuous
in
time.
What
is
the
best
word
to
fill
in
the
“BLANK"?
(D.
Sample
and
hold
().
Quantization
3.
ADC
@.
Flip
flop
(5.
None
of
the
above
Your
answer:
Midterm
Examination
—
Spring
AY2022/23
Page
2
of
8
Purdue
email
ID:
6.
Select
all
true
statements
in
LabVIEW
programming.
(.
A
feedback
node
and
shift
register
are
the
same
operationally.
v
@.
A
feedback
node
can
be
expanded
to
get
items
from
more
than
the
previous
iteration
of
the
loop.
(3.
A
shift
register
can
be
expanded
to
get
items
from
more
than
the
previous
iteration
of
the
loop.
v
@.
None
of
the
above
Your
answer:
K
3
7.
The
datatype
is:
(D.
Double
Precision
Integer
@.
Double
Precision
Floating-Point
¥~
@.
128-Bit
time
stamp
@.
Cluster
().
None
of
the
above
Your
answer:
2
8.
The
color
green
is
used
to
indicate
which
data
type
in
LabVIEW?
.
String
@.
Boolean
@.
Integer
@.
Cluster
().
None
of
the
above
2
Your
answer:
i
"
9.
The
I
datatype
is:
@D.
Integer
Array
@.
Cluster
@.
32-Bit
Double
@.
Matrix
®).
None
of
the
above
I
Your
answer:
10.
Data
is
passed
into/out
of
Execution
Control
structures
using:
(.
Shift
Register
@.
Iteration
Terminal
@.
Count
Terminal
@.
Tunnels
().
None
of
the
above
4
Your
answer:
Midterm
Examination
—
Spring
AY2022/23
Page
3
of'8
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11.
For
the
given
VI,
what
is
the
value
of
i
after
the
VI
has
stopped
and
the
output
datatype?
Z0HN
[Randorm
Number
(©-1)]
[
@.
20,
Floating
Point
(2.
19,
Floating
Point
Array
(.
19,
Floating
Point
@.
19,
Integer
Array
(®).
20,
Integer
Array
a2
Your
answer:
12.
A
Cluster
is:
(D.
A
multi-variable
datatype
that
groups
variables
of
mixed
types
together.
v
(.
A
multi-variable
datatype
that
groups
variables
of
equal
types
together.
(3.
A
single-variable
datatype
used
with
plots.
@.
A
display
effect
to
group
controls,
indicators,
or
other
Front
Panel
items
appear
as
a
single
entity.
(5.
None
of
the
above
Your
answer:
|
13.
The
following
Front
Panel
control
is
used
to
create
what?
j,
@.
Cluster
@.
1D
Array
¥
(3.
2D
Array
@).
Numeric
Control
(5).
None
of
the
above
9.
Your
answer:
Midterm
Examination
—
Spring
AY2022/23
Page
4
of
8
Purdue
email
ID:
14.
“BLANK”
is
one
of
a
sensor’s
properties
to
describe
how
constant
the
sensor
is
against
itself.
It
is
the
ability
of
the
sensor
to
provide
the
same
result
under
the
same
circumstances
over
and
over
again)Closely
related
to
precision.
What
is
the
best
word
to
fill
in
the
“BLANK™?
.
Accuracy
@.
Repeatability
v
@.
Linearity
@.
Hysteresis
®.
Reproducibility
®.
Resolution
2
Your
answer:
15.
A
sensor
has
a
transfer
function
of
SmV/°C.
what
is
the
required
voltage
resolution
of
the
signal
conditioning
if
a
temperature
resolution
of
0.2°C
is
required?
®.
ImV
@.2mV
®.02mv
@.
0.5mV
®.0.25mV
\
Your
answer:
16.
Which
is
not
a
SI
“base”
unit?
D.km
¥
@.s
@.
kg
@.K
®.
mol
'
Your
answer:
17.
"BLANK"
is
one
of
the
signal
conditioning
techniques
to
supply
energy
to
a
circuit
element.
What
is
the
"BLANK"?
Ercltation
Your
answer:
18.
Convert
5
feet
11
inches
into
meter.
(Gfll
N
)
X
o
.
03_5&‘.
Ml'-.‘
————
A
Your
answer:
!
fOA%
m
19.
One
time
constant
represents
the
time
at
which
the
output
value
has
changed
by
approximately
“BLANK”
%
of
the
total
change.
Fill
in
the
BLANK.
.
6%
7.
Your
answer:
Midterm
Examination
—
Spring
AY2022/23
Page
5
of'
8
20.
What
value
is
displayed
in
the
Result
after
the
VI
completes?
1=
0
2
a
o
2
[
arlh
h
©
0
;
Ele
0
v
Jc
%
o
0
Roo
"2
u
.'*d
Your
answer:
21.
Array
2
was
created
after
running
the
code
with
double
loops.
Determine
X
value.
O
Amy2
Y
go
i
4o
il
g
s
Tl
0
2
16
jia
|
3.
e
s
Your
answer
(X)
:
z
22.
An
analog
signal
is
given
in
the
time
and
frequency
domain.
What
is
the
minimum
sampling
rate
necessary
to
reconstruct
the
signal
based
on
the
Nyquist
theorem?
01
e
=
A
[
1
1.00051.001
1.0015
1.002
1.00251.003
1.00351.004
1.0045
1.005
[
U
G
0
040812182225
3
34
3942475257
Frequency
(kHz)
Your
answer:
—ll'—L"'f
HE
Voltage
(V)
Time
(sec)
7Y
Midterm
Examination
—
Spring
AY2022/23
Page
6of
8
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Purdue
email
1D:
23.
A
pressure
sensor
has
a
resistance
that
changes
with
pressure
according
to
R=(0.15kQ/psi)p
+
2.5kQ
where
p
is
pressure
in
psi.
This
resistance
is
then
converted
to
a
voltage
(V)
with
the
transfer
function.
10R
V=
R+10k
volts
The
sensor
time
constant
is
350ms.
At
t=0,
the
pressure
changes
suddenly
from
40
psi
to
150
psi.
At
what
time
does
the
output
reach
5.0V?
5(Rtok)
=k
R=
ok
Rt
=
O.¥le
X440
+2.5K
RE
=
015
«
/5
¢
2.5T<
-«
f.
§le
=
Ml
~ty
R
Riv
(Re-Re)
(1-e
¥
)=
ok
el
o
{.$KC|-e
Torr)
=
(o
t=
0
033
fec
Your
answer:
(,
c>
3
;
rec
24.
Given
the
signal
below,
sample
the
signal
at
a
rate
of
2500Hz.
Indicate
sample
points
using
an
O,
with
a
vertical
line
to
the
t-axis
(i.e.
“lollipop™
or
“stick™)
on
the
figure.
TS
amplitude
(v)
%102
Page
7
of
8
Midterm
Examination
—
Spring
AY2022/23
25.
The
figure
below
shows
3
bit
R2R
DAC.
If
V¢=3.3V,
R=11k
then
compute
the
device
precision
and
the
output
voltage
when
Q2Q1Q0=001.
2R
R
R
IOlll
+Vout
-
Q2
Your answer
(the
device
precision):
3
L“&
o
8
Your
answer
(Vou
when
Q2Q1Q0=001):
0.
2495
0.012
x
22
--END
OF
PAPER---
Midterm
Examination
—
Spring
AY2022/23
Page
8
of'
8