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U N I V E R S I T Y C O LL EG E L O N D O N

Univers ity o f London

E X M I N T I O N F O R IN T E R N L S T U D E N T S

Fo r the fol low ing qualif ications :M E n g

Chem ical Eng E87 : Advan ced Ma terial Processes and Product EngineeringC O U R S E C O D E : C E N G E 8 7

U N I T V A L U E : 0.50

D A T E : 13 MAY 02

T I M E : 14.30

T I M E A L L O W E D : ours

02 C0193 3 50 2002 University o f Lon don T U R N O V E R

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A n s w e r F O U R Q U E S T I O N S in c lu d in g q u e s ti o n 1 P A R T A ), O N E q u e st io n f r o m P A R T Ba n d T W O q u esti on s f r o m P A R T CA L L quest ions car ry a to ta l o f 25 M A R K S each, d i s tr ibuted a s s hown [ ]

P R T

. De ve lop a p rocess mod e l fo r supe rc ri t i ca l ex t rac t ion o f a so l id com pon en t (A)f r o m a s o l i d ma t r i x i n a c o l u mn . Ma k i n g r e a s o n a b l e a s s u mp t i o n s s o l v e t h em ode l equ a t ions fo r the concen t ra t ion o f the ex t rac ted so l id A in thesupe rc r i ti ca l f lu id phase and i ts conc en t ra t ion in the so l id m a t r ix .Dr a w q u a l it a ti v e d i a g r a ms o f t h e p r o f i l e o f t h e f i rs t o n e a l o n g t h e c o l u mn a tv a r i o u s f lo ws . Dr a w q u a l it a ti v e d i ag r a ms o f t h e p r o f i l e o f t h e l a tt e r o n e a l o n gthe co lum n a t va r ious t imes .I s a tu b u l a r co l u mn a g o o d e q u i p me n t to m e a s u r e t h e s o l u b i li t y o f A? W h y ? I fno t , sugges t a mo re su i t ab le a l t e rna t ive and jus t i fy your answ er . [25]

P R T B

2. a) Exp la in the p r inc ip le o f l i thography , a s we l l a s the t e rms pos i t ive andneg at ive res is t .Dr a w a t y p ic a l s e n s i ti v i ty c u r v e a n d d e f i n e t h e t e rm c o n t r a s t f o r b o t hres is t types .Ho w d o e s t h e c o n t r a st v a l u e a f fe c t t h e r e s o l u t i o n ? Ex p l a i n wh y .

b De s c r i b e th e g e n e r a l me c h a n i s ms i n v o l v e d i n p o l y m e r d e c o mp o s i t i o n .W h a t i s me a n t b y t h e f o l l o w i n g t e r ms i n r e l a ti o n t o c h a i n - s c i s si o nme c h a n i s ms :i ) In t ramo lecu la r H-T rans fe ri i ) In te rmolecu la r H-T rans fe rUs e r e a c ti o n s c h e me s i n y o u r a n s we r

[51[5][3][6]

[3][3]

3 . a

b

Der ive an equa t ion fo r the so lub i l i ty , expressed a s mole - f rac t ion , o f a so l idcom pound in a supe rc r i t i ca l f lu id , a s a func t ion o f the fugac i ty co e f f i c i en t o fth i s compound in the supe rc r i t i ca l f lu id . Mak ing reasonab le a s sumpt ionss imp l i fy th i s eq ua t ion . [13]De r i v e a n e q u a t io n d e s c ri b i n g t h e d e p e n d e n c e o f t h e a v e r a g e m o l a r m a s s o fthe re s is t upon the rad ia t ion dose in l i thography . [7]De f ine the cha rac te r i s t ic quan t i ty G and exp la in how i t can be e s t ima ted . [5]

T U R N O V E R

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P A R T C

4. a) N am e the method s in product development projects com mo nly used for RawData Gather ing. Com ment on them.Na m e and discu ss the methods fo r documenting interact ions with customers.

b) Name and discuss the step-by-step procedure for organising customer needsinto a hierarchy.

[12]

[1315 . a

b

c

Na m e and discuss the phases o f indust ria l design.W hat are technology -dr iven produc ts and user -dr iven products ? Discusstheir characterist ics and give an exa m ple for each group. W hat is the role o findustr ial des ign for each group?Nam e and discuss the f ive ca tegor ies for assessing the qual i ty of indust r ia ldesign.

[12]

[5]

[ ]

6. a) Na me and discu ss the f ive pr inciples ofprototyping.b) Expla in and discuss the reasons the fol low ing products haveunsuccessful a l though they were very advanced technological ly:- M ons anto s genet ica l ly mo di f ied food products

- M o toro l a s I ri d ium m obi l e phoneEx plain and discuss the reasons for the success of the fol low ing products:- Ph i l ips s di sposable f luorescent bulb- S w a t c h s w a t c h e s

been[13]

[12]

E N D O F P A P E R

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