instrumentation ii questions new
TRANSCRIPT
8/17/2019 Instrumentation II Questions New
http://slidepdf.com/reader/full/instrumentation-ii-questions-new 1/10
23
TRIBHWA}IUNTVERSITY
'
INSTITUTE
OF
ENGINEERING
Examination
Control
Division
2AT2Karttlr
Programmu
i
BEL,
BEx,BCT
i
P"tt
n[""kt
i
32
Subject:-t"t@
Candidates
are
requiredto
give
their
answers
in
their
owa
words
as far
as
practicable'
A*emPt
All
questions'
Th;
ig,r6
in
the
nargtn
indicate
Fall
Marks'
ittii,
suitable
dataif
ndcessary'
.e tools
in
msdern
industial
instrumeirtation
a)
"Microprrccessors
are
indispensibl:
Lo-?11,
i-,T::T
systerns,,.
er
u.*gri""*,
pt":"ide
a
technical
explanatioa
inciuding
block
diagrams
to
this
statement
Uv
Jfying
on
observations
&om your
case-study
-'-
design?
Design
an interface
b)
What
benefit
are
obtained
from
a memory-mapped
UO
arrangement
for
8085
rnicroprocessor
to
map
output
99ttt
i"
address
space
1000H
to
2000H
and
input
ports
ia
address
space
3000H
to
4000H.
2.
a)
consider
a
double
handsbake
scheme
thal
allol's
data
transfer
&om
an
input
'
.
peripheral
d;;;
*
sots-*i*pro""$orthrough
an
8255-PPr
t5l
1)Listatlcontroisignalstha]setexclangldbet'weenthedevices''
i0
Draw
u
ao"il"a-timing
dragram
tho*iIlg
the
exchange
of,
control
and
data
--'
,ign"l=.
lnclude
the
cause
ana
effeclSnows
in
your timing
diagram'
iii)withaneatsketchhowtheoverallsysteDxdiasrambe,tweenthemodules
nrenrfioned
above
i") a;;#;
an
appropriate
control
word
based
upon
your drawing
and
derive
the
uaOr"*
of
tm'"o"t*l
register
of
the
E255-PPI
used
inyor:r
design'
b)
List
the
c.ontroi
sigsals]Td.by
the
ISA-bIs:
Prold:
convilclg
arguments
to
justify
-
the
repracrJ;;?G
ISA
b;
by
the
pcl
bus.
carculate
the
brandwicth
of a64bit
PCI
bus
oPerating
ai'
66'N{F'z
3"
aj
'what
are
the
criteria
should
be
involved
during
the
design
of
R'S-232A
in
simplex'
-/'
HalfDuplex
and
Full
Duplexmodes'
b)
Explain
the
usB
signals
and
associated
bus
states.
Also
mention
the
signal
levels
to
I
achievethesebus
states'
'
'
7.
t4l
t4I
1
t3l
t4l
141
4.
a)
why
do
we
need
to
digitize
a
signal?
What
are
the eEors associated
with
AiD
or
D/A
t6l
converters?
-b)W}paretheselectioncriteiaforAlDorD/Aconverter?L71
r
c)
To
convert-an
analog
signal
into
digital
form,
8-bit
ADC
is
used'
The
ADC
has
eight
'
loprrt
"i,uooJtr,
*d;h;l;i
f:y
is
used
to
capixre
the
incoming
analog
sie"al'
The
address
of
the
desired
charurel
is
seni
thrrough
pi*
PBc,.
rB
1.
and
PB2.
Aft1
"t
lT:t
S0-nilloseconds,
this
address
must
be
latctred.
The
laiching
signal
is
sent'using
PB4'
Af,.ter
another
2.5-nsicrosr"onar,
pa3
is used
ta
initrate
thi
coaversion
piocess'
The
,c;Gt*oriL
pr"r"sl
i.u
signaled
via
pcs,
The
ouput
lateh
of
the
ADC
can be
gmbled1brr;*#d;,
*JAeIt
l data
can
be read
thro*gh
port
A
of
8255-PPL
tgl
-79-
8/17/2019 Instrumentation II Questions New
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i)
Draw a
circuit showing
the
interfacing
of the
ADC module,
8255-PPI
aud 8085
microprocessor_on the basis ofthe
connections described above.
ii) Drawthetiming
wa*r"ior*r
of
all the
controi and
data signals
inyolved
in
the
process.
iii)
Provide a flowchart
that depicts the ADC
process
iv) Derive
port
addresses from
your
circuit diagram
and
provide
ttre
control word
5.
a)
In
high-speed
circuits,
ngfl)rmd"
is a meaningless concept
the inoportant
question
is,
uuihat
pafh
does retutr
curre,lrt
foliow?"
Justify
&e
above statement
with
proper
reasons
aud exarnples.
t4]
b) Discuss the
importance
of
an interface
rmit.
What
factors need
to
be
accounted for
-,
u&ile
desiening
input
and
output
interface
units?
l4l
b) I{ow do
you
reduce
crosstalk
u&ea routing signal
taces ou
a
PCB?
t4l
7.
What
are the basic
principles
of signal
propagation
and circuit layout
for
Routiug Signal
Traces
wliich are
predominant
of effective
circuit
layout?
t6]
8. Pmgra.as
ue
to be
read by
humaas.
Forprograms to
be usefi,rl, reliable aad
mainhinable,
you
must
make then readable and
understandable.
Good design
and
programming
practices
s411
makg
programs
morc readable, Explain
in brief how
you
cm make.
l
programs
more
readabie.
9.
Answer the
following
questious
with respect
to
your
case
shrdy:
t8l
t12l
i) Wbat is
techno-commerciat
feasibiiity of
a system?
Provide
examples
fropayour case-
study oqperience.
ii) List
the
major
technical
drauibacks
present
in the existing MBI systern that
you
l
witnessed ai
the indusuial
site.
iii)
Giv-e
at
P*I
fu:
feasible
technical solutions
to
overcome the
drawbacits tbat
you
i
wiinessed. Show how
your
soiution wiil offer higher
reliability
and
incorporate fault-
l
d
tolerant
design
practices.
lnclude
block diagrarns.
guestion
rrould
you
anticipate? Provide a
list
of
at least
five
questioos
that
would be
asked
from
a
management
point
of
view. How
would
you
cope
with
the
qu--stions,
anri
how
would
you
convinee the
teaur
to
accept
your
deSign?
"v)Rspeatpart(d),butnowyouaretryinetoconvinceseniorerrgineers.Howwillthe
question
and answei
session
chaage compared"
to
part
(dp
vi)
Corrpare and'contrast
your
design
with
the
existing
design
in
terms
of
the foLiowing
:
mctics:
cost/performance'ratio,lsshnical
specificatiops (hardware
and
software)
and
design
complexity
(providq
diagrarns)
:
_
***.
i
-80-
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23
TRIBHI'VANI'NIVERSITY
JNSTITUTE
OF ENGINEERING
Examination
Control
Division
2071
Chaitra
Subject:
- Instrumenta'tion
tr
(EX6A2)
C'andidates
are
required
to
give
their
answers
in their swn
words
as
far
as
practicable.
Attempt
All
quesrtons
Thefigures
in
the margin
indicate
Full
Marks.
Assume
suitable
data
if
neeessary.
l.
a) How
do
you
select
a
microprocessor
or
a microcontoiler for
your
project?
t3]
b) Exptain
the
block diagram
of
a rnicroprocessor based
instrumentation
system.
What
are
the
basic features
of
a
microprocessor
based instrumentation
system?
t5]
2'
3
#HTi--J:"1ltiil
r;,rer
in mode
r.
port
A
is designed
as
input
ro.
k"ybo*dI
J
wi& intemrpt
VO
port
B
is
designed
as output
for
printer
with status
check VO.
Draw the
mapping
circuit
and write
the
conti'ol
word and
address map.
t6]
a)Design
a
cable that
has a
USB
connector
at
one
end
and
an
RS-422
connector
at
the
other
-
end.
Assume
the
USB
is connected
to a iaptop and
the
RS422
connector
is
attached
to
a
printer. Your
design should
include
the following:
t5l
.
i)
Technical
natnes
of
the
pins
and
wires involved in
the
design,
ii) Intermediate
chips to maiatain
voltage
uniformity
between
*re two
standards.
iii)
Neat
and
labeied sketch
of
the
wiring between
the
turo
standards.
b) What
is'a
USB
interface
chip? Why
are they required?
Compare
and
contrast
USB device
interface
chips
and USB host
interface
chips.
t4l
a) Calculate
the
values
of the LSB, MSB,
resolution and
full-scale
output for an
8-bit
DAC
for
the
0 to
10V
range.
l2l
b)
Hotv
can
you
design
a
DAC
with 12
bit resolution with
the 8085
microprocessor
having
I
bits
data
lines?
Explain
with
suitabie block
diagram.
t6l
5.
a) What
are
the
essentiai
components
of
data acquisition
systerr?
Explain
with
the help
of
block
diagram.
t4l
b) Explain
Bluetooth
network topolory
in brief.
What are
the
advantages
of
Bluetooth
applications?
l4l
6.
a)
What
are the
characteristics
of
a safety
ground?
l2l
b)
Describe
different
ty'pes
of
noise
coupling mechanism
in
brief.
Hou. do
you
check
their
4.
t4l
redomindnce
in the
circuit?
-77
-
8/17/2019 Instrumentation II Questions New
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7
-
A
data Iogger
receives signals
from
a
Bluetooth
scattemet.
The
scattemet consists
of
three
piconets
and within
each piconet
there
are
four
bluetooth
devices. The
piconets
cornmunicate
withia themselves
and amongst
each
ottrer
using
the master/slave
pr&ocol.
tl0]
a)
Describe
an analog
transmission
mechanism
to
capture
the
blue
tooth
signals
by
the
data
logger.
Draw
a
complete
system
block
diagrafii.
b)
Describe
the
mater/slave
protocol
thd
is
present
in
blue tooth piconets
and
s.cattErnets
c)
Drarar,
the
scatternet
topology
de,picting
the
scenario
maintainid
in the
question.
Make
8.
a)
While
designing
an
electonic
insnument
you
should group
circuits
according
to
their
characteristics
to
maintain
the
correct
operation
of
each circuit.
What
are the
considerations
druiag
grouping
components
and circlits
and
what
is
the
impact
of
such
grouping?
t4l
b)
what are
the
factors
that derive
reliability
of an electronic
system?
lzl
9- Compare
and
conEast
the three
traditional
mod.els
of
sofnvare
development
with
rcspect
to
their
strengths
and
weaknesses.
Propose
a
fourth
softrrare
development
modil
that
outperforms
the
classical
methods
and
justif,
your
choice
in terrns
of retiability,
maintainability,
flexibility, portability
and reusability.
t4l
10.
Draw
te
complete
block diagram
of
industrial
process
contol
systern
involved
in
your
case
study,
Explain
why
you
want
to
implement
this
contuol
system
over
existing
one
in
terms
of
cost,
manPower
and
plant
automation.
What
problems
you
might
face after
irnplementating
-78 -
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24
TRTBHUVAN
UNIVERSITY
INSTITUTE
OF
ENGINEERING
Examination
Control
Division
2fi71Shawan
./
Candidates
are
required
to
give
"*
*r*";;;;;;;;;;;;
'---
{
Attempt All
questions.
,/
Thefigares
in
the
margin
indicate
Full
Marks,
,/
Assume
suitable
data
if
necessary.
1.
Draw
and
explain
the
btock
d.iagram
of
microprocessor
based
instrumentation
system.
Also list
out advanteges
of implementing
an
MBI
system.
Explain
briefly
the
concept
of
DMA.
[4+2+21
2. Assume
that
your
group
has
decided
to
make
a
PC
based
insfumentation
control
system
for
automatic
concrete puri&ing
factory
using
an
8255
PPI card
at
base
address
4000H
in
memory
mapped
VO
mode
for
conirolling
purpose.
'
+1+7+-rr
a)
List
out
the
collected
documents
and
compone[ts.
L
i-
i-ort=
i
b)
"
List
out
the
differeat.sipals
you
need
to
derive
and
or
can
be
cormected
directly
to
your
interfacing
circuit
c)
Draw
minimurn
mapping
circuits
for the
above
system.
d)
What
are
the addresses
captured
by
your
card?
Generate
the
control
word
for
the
system.
e)
Write
a
Program
module
to
read
ten
set
of
raw
data
from port
A
and
port
B;
add
the
data
and store
the
result
starting
from
address
4040H.
-
r
3'
a)
Describe
the
problem
that
occurs
when
you
attempt
to
connect
together
two
Rs.232
devices
that
-are
both
configured
as
DTE.
Draw
u
aiugrum
whict
shows
how
this
problem
caaberesolved. I5l
b)
Explain
USBprotocois
which
should
be
followed
during
the
USB
design.
i5J
4.
What
are
char,agteristics
of
AJD
or
D/A
converters?
With
necessary
diagram
expiain
the
interfacing
of
10 bit
DAC
with
8085
along
with
timing
diagram.
5"
a)
What
is
data logger?
Explain
the characteristics
for
a
data
iogger.
b)
Write
the
advantages
and
disadvantages
of
optical
fiber
communioation.
t.
Elurirl;:t:
'.1:*
p-:tli:rl:
;l
ri,und::E?
Mer,tcx
hc'.y
r,an,,
configuations
are
a.,,,ailable
tc
prlvide
the
basic
principie
oigrour.iiiag.
7
.
a)
What
are
the
reasons
for
using
low power
design?
b)
Write
about ground
bounce,
cross
talk,
impedance
matching
and
timing
skew.
8.
Fault
toleranc.e'reduces
possibiiity
of dysfunction
or
damage
from
abnormal
stresses
and
failure.
It
has;.ti:ree
distinct
areas:
careful
design,
testable
fimctions
and
redundant
architecture.
Explain
how
w-F
can avoid
many
faitures
using
&ese three
approaches.
I' IOE
is
planning
to
apply
new
Software
for
its
database
management
sysrem.
Suggest
the
best
selection
and
purchase
procedure?
Explain
in
detail
about
giod
,;"Oi.A+
practice.
10-
riltrat
have ydu
learned
frorn
case
study?
Drara,
the
compiete
block
diagram
of
the
industrial
process
control
involved
in
your
case
study.
What
are
the
critica
factors
affecting
the
production you
have
noticed
in
the
vidited
industry
and
what
measures
can
you
suggest
for
the
same?
What problsms
you
might
face
after
implementing
your
d
process
control
s)rstem.
***_
g
L
_
12+4)
t5l
13j
.1
:1
i.:-r-l
p1
t4l
t6l
[3+s]
Year
/ Part
u2)
8/17/2019 Instrumentation II Questions New
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1
23
TRIB}ruVAN
UNIVERSITY
INSTITUTE
OF
ENGINEERING
Examination
Control
Division
2070
Chaitra
Programme
----*--"-
i
Year/Part
1.
2.
candidates
are
required
to
give
their
answers
in
their
orvn
words
as
far
as
practicable'
Attempt
4 questions.
Thefigures
in the
margin
indicate
Full Marlx'
Assume
suitable
daia
if
necessary-
Describe
the
various
PC
interfacing
techniques
involved
while
interfacing
an
I/O
device
vrith
a
PC.
Differentiate
closed
ioop
microprocessor
based
system
over
open
loop
rnicroprocessor
based system.
Explain
briefly
abgf-
C[
bus.
The
base
address
for
the
interfacing
circuit
givenbelow
is
5500
H:
a)
IdentifYthe
Port address
b)
Write
the
necessary
conlrol
words
to
initialize
the
8255
c)
Draw
the
timing
diagram
for
the
configuration
as shown
in
ltgure
below.
a) Explain
how
comrnunicaiion
takes
between
two
data
terminal
equipment
modem connection.
b)
Compare
between
RS
232C,
RS422A
and
RS423A'
c) Compare
the
standards:
UStsi'i
and
USB
2'0
Explain
the
error
associated
with
A/D
and
D/A
converters'
in
lllr.jl-l
[3+4]
[3+6]
4-
I4l
14l
121
t8l
Exam.
;-EgI- g*l-
-,i
i
P*ss
Marks
i
32
i
I"Tim-*--*-*-i-i
h*.
-l
8/17/2019 Instrumentation II Questions New
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5.
What
are
the components
used in Data
Acquisition
system,
explain
with necessary biock
diagram. Why
optical
fiber
is dominating
the
other
guided
medium
used
in
riata
transmission
schemes.
6.
a)
Describe
the
working
principle
of
decoupling
capacitor in
short.
b)
Explain
differeni
types
of noise
coupling
mechanism.
[5+3]
L2)
l4l
7.
Stqrting
froin
the
converting
the
requirement
into
design, Explain
the
procedure
of
designing
electronics
circuit.
t6l
8.
Write
about
the factors
we
should
considered
whiie doing component
placement.
What
rule
does
a
designer
have follow
while routing
signal
tracks
in
PcBs
in order
to avoid
the
effect
of iilrpedance
mismatch and
cross talk.
[3+3]
9.
Once
you
have
tested,
verified and release
software,
you
have to maintain
it.
As
with
testing,
you
cannot separate
software
maintenance frbrn system
concerns.
Discuss
at
length
how
you get
commor bugs
in software
and
develop
a
good
corrective
action
to
fix
softwarebugs
in
your
distributed
software.
18]
10.
Explain
existing system
involved in
your.case study
with
necessary
block
diagraml
Ulut
wtrs
your
recommendation
over
the existing
system in term of cost, manpower
and
plant
automation.
Ll21
**t
:i.c&i*.ri#* .ti**n.-r-#k ffiio
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..4,IR}BHUVANUI\IJVERSITY
NSTITUTE
OF
ETdGINEEFJi{G
Exag?aiggatiom
CorsEroE
Bivisiorr
@x642)
/
Carrdidates
are
required
to
give
their
ans-wers
in
their
own'wcrds
as
far
as
practicable'
-
.,'
Alie:npi
4i
questions-
,/
Tne
f.gui'es
ir
tize
margin
indicate
Fwli
Mqirks'
{
Assunze
suitable
darc
if
necessary.
-t.
Draw
and
explair,
the
block
diagram
of
microprocessox
based
instrumenhtion
system'
Also,
list
out
advantages
of
implementating
*, Mgi
system
in industrial
plants
for
control
and automation.
14+41
2.
The
addresses
caprured
by
g255
pPI
are
A0A0H
to
A0A3H.
Sketch
the
interfacing
circuit
with
8085
microprocessor
in
memory
mapped
VO for
same.
What
will
be
the
contol
u'ords
far
lollowiiig
coufigrirations
of
8255
PPI?
a)
Port
A:
Mode
0 outPut
Port
B:
Mode
0
inPut
Port
C:
Mode
0 outPut
b)
Port
A:
Mode
I
outPut
Port
B:
Mode
1 inPut
PC+,s:
outPut
c)
Port
A:
Mode
2
Port
B:
Mode
I
outPut
d)
Set
PC5
in
BSR
mode
3.
a)
Serial
data
transfer
mechanisms
are
much
more
complicated
than
parallel
data
transfer
mechanisms.
But
still,
serial
data
transfers
are
preferred over
parallei data
transfers.
wny/
b)
How
can
serial
data
transfer
using
RS423A
standard
transfers
data
at longer
distances
' compared
to
RS232A
standard
for
the same
data rates?
c)
What
is
On-The-Go
protocol
in
USB
2.0?
Explain
the basic
data
transfer
mechanisms
.
used
in
USB
standards?
4.
Expiain
the
error
asscciated
with
AID
and
D/A
converters'
5.
a)
What
are
the
characteristics
of
Compact
data
logger?
Explain
with
block
diagram'
bi
What
are
piconet
and
scaternet
in
Bluetooth
device?
6.
a)
What
is a
ground loop?
How
can
we
eiiminate
them?
b)
A
commeicial
bank
has
placed its
ATM
counter
inside
a S-star
hotel.
Customers
would
walk
through
oarpeted
hallways
to reach
the
ATM
and
insert
their
debit
card
into
the rnashine
to
retrilve
cash.
However,
the bank
faced a
disturbing
problem'
-the
elecfionics
in
the
card
reader
circuitry
was failing
frequently
causing
an
adverse
effect
to
the
bank's
reputation.
What
could
have
caused
the
probiem?
Explain
the
measures
to
Prevent
this
Problem.
la.+41
I
,
'l
12+21
7.
Explain
how
the
reliability
of
a
circuit
can
be
increased
by
using
testabie
architectures
-
[3+3]
and
redundant
architectures
in circuit
design'
8'Howcancrosstalkcanbeminimizedduriagroutingthesigna1traeeinPCB,Describe
with
trace
impedance
matching
techniques'
t6]
g.
a)
Mosi
,
microprocessor
based
systems
use
embedded,
real
time
softwares
for
processiog.
Ho*
can
you
increase
the
reliability
of
such
softwares?
i3]
u;
Epi."i*"aJof
scftware deveiopment
combin"t
tlr_.
elements
of
both
waterfall
and
-
/ piototypiog
n
oJ*t.
fxplain
the
pio"*ur
of
software
deveiopment
using spiral
model.
t5i
10'Drawandexp1aintheb1ockdiagramofexistipgindustrialprocesscontroiSyStem
i_ovolved
in
yo*
"u*e
stud,v.
Explaii
yo,rnr^rrosed
iystem,nittr
aclvantages.
[6+6]
t2l
n1
L-J
12+41
t8l
t6l
121
[1+1]
8/17/2019 Instrumentation II Questions New
http://slidepdf.com/reader/full/instrumentation-ii-questions-new 9/10
]'RiB
HUV
4.N
iJ}.{iVERSiTY
I].,iSTITUTE
OF
ENGI}dEERN{G
Examsllaatiore
Comtr*l
[li,rasi#Ea
2069
Chaitra
,'/
n,
I
Exgrm"
i
E
eve|
Fregrariame
BEL,
BEX,
**i:-*-:
_*]-.^
BC,'
i
Fass
Marks
I
32
..
I
.:_
* Ewi
g::Eles91Hi-?L
11
gxl
w
Candidaies
are
required
to
give
their
answers
in
their
own
words
as
far
as
practicable.
Aitewpt
AII
questions.
T'he
figures
in the
margin
indicate
Full
Mcrks.
Assuine
suitabie
data
if
nece.s.so4],..
2'
in
a.microprocessor
based
system,
an
82554
PPi
card
is used
to
iatedace
a
keyboard
and
a
pdnter
to
the processor.
The
E255A
PFI
is
interfaced
wirh
the
8085
microprocessor
in
the
systEm
such
that
the
base
address
of
g255
A
ppl
is
4044
H.
a)
Vlhat
arethe addresses
captured
bythe
card?
b) Draw
the
complete
interfacing
circuit
of
82554
PpI
with
80g5
microprocessor
for
the
given
system.
'-E-
c)
If the printer
is
interfaced.to
port
A
and
the keyboard
is
interfaced
to port
B
of the
ppl
generate
the
control
word
to
initialize
the
82554
PPI
with
proper
expianations.
Both
printer
and
keyboard
use
8-bit
paraliel
d.ata
transfer
with
harrdshakingl-
d)
Derive
the
control
word
to
enable
internrpt
request
to
the
microprocessor
by
port
A
of
8255A
PPI
in
above
system,
with
proper
explanations.
3.
a)
Compare
the
USE
standards:
USB
1.1
and
USB
2.0
b)
Describe sirnplex,
half
duplex
and
fulldupiex
operation
using
RS-232 port.
1'
Exrl11
bti:1y_
tle
concept
of
DMA.
Draw
circuit
Diagram
of an
interfacing
circuit
containing
4
KB
ROM
and I
KB
RAM.
Assuming
Base
address
in
4000H.
you
also
need
to
drar,v
write
and
read
cycie
timing
diagram.
L2+61
t1l
t3l
t21
rnl
LLJ
t3l
t7i
4'
Whul
ar-e
t)?es
of
errors present
in a
AD
or D/A
converters?
With
necessary
d.iagram
explain
the
interfacing
a
ADC
using
intemrpt.
[3+5]
5'
a)
trxpiain
different
network
topoiogies
of
Bluetootir
cievice
witli
appropriate
diagrams.
l4l
b)
What
is
a data
logger?
Expiain
ttre
desuable
characteristics
for
a
data
logger.
1f
+11
6'
,lY^'f
different
types
of
Noise
coupling
Mechanism
with
concept
of
pseudo
lmpeoance.
7
'
What
are
the
reasons
for
using
low
power?
Meution
the guideiines
to
be
considered
for
t6]
.
power
crestgn.
p+4j
8'
A
careful
circuit
layout
not
only
makes
the
production
of
circuit
boards
easier
but
also
makes
them
less
elror
prone.
what.yler
d9"r
a
designer
have
to
follow
wrriie
routing
signal
tracks
in
PCBs
in
order
to
avoid
the
effects
of
irripedance
mismatch
aud
crosstalk?
[3+3]
9'
What
is
fault
tolerance
in
software?
What
do
you
mean
by
roll-back
recovery
and
roii-
forward
recovery?
Explain
different
types
of
bugs
in
software
lz+2+4j
10'
a)
s/hat
are
the
taoes
of
Microprocessor
based
systern
used
in
instrurnentation
system?
How
it
makes
more
benefits
in
industry?
b)
Explain
detail
about
different
processing
plant,which
you,have
stuciied
in
case
study.
i3l
Also
iraw
the
block
diagram
for
furtherlnrprovemeot
of
th"r"
"ir
prrrt
and
overall
systein.
t9l
:
-86-
8/17/2019 Instrumentation II Questions New
http://slidepdf.com/reader/full/instrumentation-ii-questions-new 10/10
24
TE.IBI{UVAN
UNIVER.SiTY
INSTITUTE
OF ENGINEERTNG
Examiesatiom
Comtro
Division
2S68
Chaitra
Exam.
tr anrol
tsE
full
Marks
80
Frogranume
BEI-.,
BEX,
BCT
Pasc
Marirs
32
Yenr/Fafi
III,'
I
Time
3
hrs.
Sub
:i"rt
r*gntation
Il
(EX
60i)
candidates
are
required
to
give
their
answers
in
their
own
w.ords
as
f,ar
as practicable.
AtternptA$quesrions.
----
-""'i
?izefigwes
in the
margin
indi*ate
{uli
futrar*s.
,4s
swne
suitab
le
dala
iri
ne
c essdti)-
'
1'
a)
one
thing
embedded
real
time
systems
have
in
common
is
that
they
include
some
tyoe
of
processor'
They
range
any
where
tom
a
r"rii-progru*
r"prt-ar"ice
to
a
full-
ledgeri
pc
on
a
chip
or
board.
,4t
s^ome
poiri,
*
*gi=n"r,
a"tial
;n;h;;il;
rocessor
to:r.
How-did
he pic,k
it? Areihere
*y
,uiionat
,"*o16
ror picking
one
over
anothel?
or
arg
all
processor
selectiols
based
on
personal
bias?
And
what
are
the
situational
factors-imposing
selection
of
;;i*r;"cessor
or
microcontroller
for
a
design.
Discuss
at
length.
b)
Cir"
a
short
introduction
of
ISA
bus.
t71
i3l
2':
You
have
to
interface
ADc
with
8085
using
82554
poris.
interface
a
fan
and
a
heater
using
opto
couplers
to
derive
tili/b
devices.-If
th"trrip"rut*"
is
less
than
t0"c,
turn
on
he
heater
and
if
the
temperature
is
higher
-1u,i.3l"d'#*
,n
the
fan.
use port
A
of
g255
for
'transferring
digitai
data
output
oi
aoc
to
the-Cpu
and
part
C
for
control
signals.
Assume
that
an
analog
input
iiprTenl
o
l."onJ
i"prrt.of
the
multiplexerand
a clock
input
of
suitable..frequelicyis
urrilubl.
for
ADC.
erroGt"
an
appropriate
flow
chart
and
,algorithm
to
facilitate
your
design.
Draw
trr.
airs'u*-or'yo*
oesiln.
tgl
3'
a)
what
is
di'saster
recovery
in
sofiware?
i{ow
could
it
be
implernented
at
your
organieation?
b)
In
the
sof,tware
developments
process,
proper
planning
is
essential
in
delivering
the
finished
product
tl.th.
client.
bqually
ii
ir
i*p".t*i'?iru,
bugu
have
to
be
removed
frorn
the product'
Discuss
in details
about
the
nature
ortrrg,
irisoftwaredeveiopment
process'
wlat
are
the
preventive
steps you
would
take
to
minimize
introciuction
of
the
bugs?
F{ov''
stub
discontinuity
cause
impedance
mismatch.
Aiso poinf
out
the
causes
of
ross;aik.
Explain
in
your
o.,vn
w-ordi
with
reievant
il;.
-
"Estabiishing
reauiremeni
is
the
most
dif;icult
part
of
eircuit
design,,.
whiie
designing
ti:e
;:T:T*t
circuit,
speci*
and
expiain
the
procedure
of
converiing
the
requiremeats
into
13l
I
5.
A
i6l
l4+11
L
"-l
I6l
tzl
a)
Diftrentiate
between
USB
1.1
itself-with
the
inter
cing
unit
necessary
diagrams,
t6l
and
USB
2.0.
State
briefly
how
USB
2..0
irientifies
and
establishes
communication
prctocoi.
D;r;;;;
b)
Expiain
rhe
functions
the
DSR,
DTR,
RTS.
crs,
?XD
and
RXD
signais.
7'
signais
from
thJee
different
transducers
(A,
B
and
ci
io-cated
100
meters
away
from
a
conttol
room
in
a
factory
are
very
importaat
to
control
stepper
motors
to give
final
tune
to
he
products.
?ire
srrensth
of
these
signals
;g;;;-rb*,
to
20mV
ilJ
separated
ar
tr.,2.
?ransducer
A, B
and
C
generate
6KFiz,
iOfU,
*Ji?;:i_:r;i;;;r*,"