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