me 383 exam 1
TRANSCRIPT
-
8/19/2019 ME 383 Exam 1
1/11
$)
N.,rt
or/Proton/Electrons
(b)
Aluminum
@ritu'ir*
(b)
Volume
(d)
Density
4.
Why
does
an iceberg float
in
ocean water?
(c)
Iceberg are equipped with floating device
(d)
Iceberg doesn't float,
it's
supported
by the ocean floor.
5.
Which
of
these
are
ferrous
based
metals/alloys?
@Cast
Iron
(d)
Zinc
(d)
Natron/Patron
/Ele
ctrons
2.
At
room
temperature,
which
of the
following metals
have
HCP
or
llexagonal close-
packed crystal strucfure?
(a)
Chromium
(c)
Copper
3.
Which
one
of
these is a
mechanical
property
of
a
material?
ME
383,
EXAM
1
Exam
I
ME 383- Modern
Manufacturing Process
Thursday September
fith
20T4
8:00
-
9:15 AM
Open
Notes/Textbook
Calculators allowed
Section
1:
Choose
the most approoriate answer
for
each
question.
1.
Atoms
consist
of
the following
(a)
Neuron/Positron/Electrons
(c)
SiliconA{euronlPositrons
/
-'l
(g)
Yield
Strength
(c)
Thermal conductivity
,n
p)
Iceberg is less dense compared to
water
(b)
Water is less dense compared to
Ice
(a)
Aluminum
(c)
Gold
Page1of12
,O
SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS
-
8/19/2019 ME 383 Exam 1
2/11
ME 383, EXAM
1-
7.In
production
of Iron,
why
is
limestone
used
(CaCOl)?
strength?
trength
Sstr.ngth/Density
(a)
To
supply
heat
(c)
To
increase
strength
(a)
Ionic
bond
(c)
Secondary
bond
(b)
StresslStrain
(d)
Mass/Unit
volume
(b)
Metallic
bond
@
or a flux
to
remove
impurities
(d)
To convert
to steel
8. In
the
figure below, what
kind of
bond
exists
between
the
atoms?
0utar
ortit
Shared
electrofis
(b)
Machining
(d)
Carving
removal
process?
(b)
Pultrusion
(d)
Stamping
$Covalentbond
9.
A
material
is subjected to
load and
it
breaks
without
deformation.
Such materials
are
said
to
be
(a)
Ductile
(d)
Amorphous
(b)
Elastic
10. Coach
Sabans statue
was manufactured
by what
technique?
@vr"tur
casting
(c)
Extrusion
11. Which
of these
are
material
(a)
Casting
fdhtutitting
SEE
NEXT
PAGE
Page2of
t2
-
8/19/2019 ME 383 Exam 1
3/11
ME
383,
EXAM 1
Section
2: Fill
the blank
space
1.
Identiff
the different
regions
of
the
plot.
1455"C
i2851,..9i
l{egi*n
f)
R*gion B
T
lti
:iltl
1* ?S 30
40
50 60
7*
S0
S0 180
i:;
Nrchel
iN )
'''
L
li ;'
30srl
28S0
?60*
?"980
22I{1
200a
1e00
L
n
*
s
E
*
g
.o
()
$:^r
J,'
egion
A:
Region
B:
Region C:
Region D:
2.
Identiff
the
kind
of dislocation
in
each
figure
below
Figure
(a):
Figure
(b):
t'
{b}
-d
'-\
t.
*--l
Page 3
of
12
/'
l
/---
-t
,
*'
-
8/19/2019 ME 383 Exam 1
4/11
ME 383, EXAM
1
3.
Identify the various
parts
of
this manufacturing
technique
&ffi
Part
A:
Part
B:
Part
C:
Part D:
4. Metal casting
is a
process
of
pouring
to
achieve a desired shape.
5.
Identify
the two kinds of
patterns
shown in the
figure
below.
i
metal
into a
rl
i
pattern
Gating
sy$tem
(a)
Fig
(a):
i,
i
Page
4
of
12
-
8/19/2019 ME 383 Exam 1
5/11
ME 383,
EXAM 1
6.
Identify the
different
parts
of
the
gating
system.
Part
A
P*rt
\,tr
ffi
RUI{]-IEE
EXrEHSt0ti
C.ASTlf'lES
i
,:I;J
i_
_*t
/_e*
SPFUE
Vs'ELt'----
EUr.lr:lEE
trryELt
Part C
t}
1
Part A: fru
r
l,',u
L
k,
I
-
Part
B:
J
nfLt
P
I
Part
C:
Y'l,tflr1f
r
7.
The.f:"
t:.,"s ofTecondary bonds
are?
ta):
,lJ
iPl
lf
1i,
ir
'
,. ,
I
g):
k,tL,
ir,,
rP
'tVr^,,
,)tr
l'r"'.lJ/
(c):
H,,Jrcafn
f,6n, ;,i,
8. Identify
the
different
regions
of
the stress vs
strain
plot.
*
t
h
B:
P,
A:
fla. v lffir,*
f
Resi*r:
c:
P
l"
t
r'if
s
flr,ln,r
il
ru*is
re
sfsrl
**ll-*
o-2'/o
offset
Strain,
e
Page
5
of 12
-i
)
-
8/19/2019 ME 383 Exam 1
6/11
ME
383, EXAM 1
energy required to
. Specilic
heat is
defined
as
the
quantity
of
l
/',-,'f
increasethe i{l;rii}i',
ir-l
iir
,
of a unitof massof
materialby
t .;'
r'
,
t
degree.
10. A
small
gap
is
provided
between
two adjoining rails
as
shown
in
figure.
This
gap
is
provided
to accommodate
I
),f
,
fif,
d
,",,r,,
-,,1,
of the metal.
(c)
:
11. Engineering materials
can be
classified into
three basic categories:
(b)
:
L
i-,
r''
r
Section
3:
Solve
or
answer
briefly
with
your
iustification
1. A
material
of
gage
length 150 mm initial length
and having cross
sectional area of
50
mm2 is
subjected to external loading
of 2000 N. At
tensile
load
of 3500 N, the instantaneous
cross section area measured
was 40 mm2 and
gage
length
was 165
mm.
Calculate
the true
stress
and the
engineering stress and engineering
strain for
the
same
material
at
a
load
J)L{
/
r I
/'\':,'
.i'',.:
j'
'llt
L) i
t
ii-
"l
l-
r i
r-
]
,r-
'
t
5'"rtil''1"'
','
\
-..j----,-.-----
1)
t,'
,
:i.
'4
I
l,
ti
li
/(
i''
.
{
r.i
t,
(/t
:
.1
l/':
r.
Page
6 of 12,
r
l, $
i':
i'
,:,''
lr
,'
' ,,
'
fl"lr
.,---
,-l
i
\
'
'
t,t,,ja
,
-
8/19/2019 ME 383 Exam 1
7/11
2. Draw
a rough
stress/strain
eurve plot
for
a
brittle
and
duetile
material.
fner,
(
ftry,*_*,
./'
$r;rrlr
(
*?r*
&iq
r:
-
{rr
Nb,ur
kl
{*rrg,y
ME
383,
EXAM
1
Itut*"ilB
Page 7
of
12
-
8/19/2019 ME 383 Exam 1
8/11
ME
383,
EXAM
1
3.
As a manufacturing
engineer,
you're
provided
with three
different
materials
to
manufacture
a heat
sink
(part
which removes excess
heat)
for
a computer
processor.
The
three
materials
are aluminurn,
glass
and
polystyrene.
What
material
would
you
use to
manufacture
your
heat sink
and
why?
1
friiirlrltlinr
-l
r
L"t
tht,
r{
i
;
ii.
iiiif,
l
, {,illll.{i
,/
'.
L
\r
ll
I 1-
,
,J
('
ttll
il
rl
tt
l\-
ni
lrrr,
JrrA?(JI
I
;'r''
i' it
ii''
i,'''i''
.i
,\.-{
,j
}
''
4. Pig
iron
is
obtained using
blast filrnace.
Several
raw
materials
are used
in
producing
iron from its
ore.
Please
note the
different
raw
materials
used
and erptain why
they are
used
or what is the funetion
of,each
raw material
in brief.
--
chxryao{
)ron
lre
r'
({ir;,ittd
{'irh
Nt*Lt{t
/ I
i
l,,
,,,,p.11;t
I,.,,LJI,
f
kt
-
Ji'
,'i'r
J
i""t\
I
ifi;'
:,t
j,,,,fJt(fi( - lrJrj {,,1ii ,' ,1
Jc
,f,tiJ V-'r 'l$,ttv
ttLlt
r
-
/rr
Jlgg
if
J{:
i
'it
t)tt
rtt
:
l1r
l;,
5.
A
customer
approaches
you
to manufacture
engine
blocks. Two materials
are
provided,
steel
and
aluminum.
As
a
manufacturing
engineer
what
manufacturing
process
and
what
material
would
you
suggest
based
on
-
Scenario 1:
very simple engine
block
design
and
in
large
quantity
with
good
surface
finish
and dimensional control.
/
Scenario 2: complex
designo
large
engine
block, high mechanical
strength.
0
rt
hrclq
Pase
8 or 12
-
8/19/2019 ME 383 Exam 1
9/11
l)
t,ro1
;
A1tmbly
0
pu,$*'r"t
ME383,EXAM
1
yrc,r;
hi,,l.,
[nulhanim
'{ triy}it
,
/rr,
irri
"
-.''k;;[f'"u*J
i
{t,
l'lei''f(
l'oi1.
i
Trfin
A
I)
du*n,
nn,
;/P.,offrfting
ff
ltrr
*rrrr'.r
froc:
liqLru.dlh{
/
rta;
{m-
la,,gt
Ltnilrr
rr,,J
ea,
Pdruinflf
6,
As
a
manufacturing
engineer,
you're
required to
produce
long
cylindrical
hollow
pipes
as
shown
in the
figure below.
Taking into
consideration
the secondary
manufacturing
costs,
explain
what
manufacturing
process
would
you
use
to
produce
the
product
shown below?
I
-1.
$t:l^rit
I
[a.r
i,.u
/
J
tr^p)eri
g
{
i.,+rt(.attl
ya-c l's
{
--)r
o{
lrpat
Page 9 of
12
-
8/19/2019 ME 383 Exam 1
10/11
ME
383,
EXAM
1
7.
As a manufacturing engineer,
which
of the
following
two
mold
casting
design
would
you
chose and
hriefly
explain
why?
Molten
m€tat
i.inr+an
*atrr
Design 2
ttr,ti(r
to
*in {r.
[,*l
fnlt
ti
;r,r-
i,
mnlle'
4
8.*@atleastsixgeneraIdefectsseeninametalcasting?
))
g*,r
fut'o'ity
il
rh.;nruye
il{m*"r
iJ
A,lJ
,"u1a*'"
f6
i
&{
rr
u
tf
)
yottrr
in
g
l^P*rt
l
)ut'"
t
\)
lh*all^.,rv
Jehtr:
.
Jl
0
tlt
i<
,'GJ
trvt
(+rii(
1)
liy;1g
t
il4olten metal
Page 10
of
12
-
8/19/2019 ME 383 Exam 1
11/11
l$&rd,*,
-A^J
rnulJ
-/
prrJ
n r
ti5n
+i
zc
y
h
fi-n
I
arlJei
castingyou
have studied
in
this
course,
))
ErynJ*tk
^
lkilJ',
fa.,r,nlg
,-
E
yr';,il
Nlr,lL
10. What
are the
two
different
kinds
of
mold
casting?
Mention all the
expendable mold
ffiulJ
/r.nJ
frw a/w
no &(
ME
383,
EXAM
1
few
desirable
properties
of
^11
9.
What
are
the three
different
kinds
o.f
sand
molds?
Mention
the sand mold.
(not
sand )
i;1.,1{i
*
,ut
.k^M
a{
JJ
wiloy:
c,n
L.5l
,1,,$
i
r,utt,
l^
{ ,(.rfjl\Ct
l
.r'r'tran*
il
jl
[a;tiT
ft1tni
{n
1l
l,a+ig
Jl,d
I
fr.,;a,,4
Lc&
*tti,,l
Page
11 of 12