University Of TechnologyElectromechanical Engineering Department Electromechanical System Dngineering Section

Subject: Physical ElectronicsClass : First year

Time: 3 hoursDatc: ofJun 2013

Student Name: Number of Identity: Signature:

uestions Onl

(A) Physical Electronics(Q-1) (A) Find the temperature at which an electron above Fermi-Dirac by (0.3 e\) is 157o?

(B) Prove that the conductivity is :

o = ne2l/mv (14 Marks)(Q-2) (A) For charge densities in a semiconductor to produce a Acceptor-Type Semiconductor,

Determine: n - concentration, p- concentration and Fermi - Level (Ep).(B) Find Is, Vcs in NPN transistor when Vss is 0.6V, VCC is 10V,p is 30, Vsg is 2V,Rs is

10KO and Rc is lKO . (14 Marks)

(Q-3) (A) Draw and write the equations of diffusion current densities for electron and holes.(B) Design a suitable circuit if the input voltage is 200 volt, and the nominal Zener current

is 20 mA. Find (a) the value of \1and \2 where each Zener diode conducts l0 mA,

(b) The power dissipated in \1 and R.2 ?

Rr = 2000 QVr = 30 volt

(14 Marks)

Rs2&r

Vg

Constants:;-hi;lo-3' ksh=6.626 x 10-34 J.sN,r = 6.022 x 1023 (mol)-r

e :1.06 x 10-re Ck = 1.38 x 10-B J/oK

mr : 1.672 x 10-27 kg

€o = 8.85 x 10-12 c2lN.m21eY = 1.602 x 10-re J

Ir:15 mA

v

II

lz

s2 =120 V

t50v

II

+

=l0mA

(B) : Ensineerins Materials

(Q-3) Answer the following:l- Macke compare between ceramic and polymer.2- Explain why the engineer studies Materials Science.3- Draw the relation between potentiar energy and inter atomic distance.

(Q-4) Complete the following:1- Semiconductors have electrical properties that are intermediate

between the electrical ------------- and2- Biomaterials that can be used for replacement of ___-__-___-and ______--_

human body parts.3- Net Energy = --------- + ---------.

4- The percent ofcarbon in medium carbon steel is _____ yo.5- Stress6- Copper is -------- to corrosion.7' '--""--"" is resistance of material prastic deformation caused by indentation.

(Q-5) The standard tensile test on a specimen of low carbon steel. The diameter of specimenDO =f9 mm and its length LO = I00mm, the yieldLoad 21.05, ultimate load is 28.5 KN and fracture load 22.5 KN

Determine:l-The yield stress (o y).

2-The ultimate stress (o u).3- The fracture stress (6 u).

GOOD LUCK

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Electromechanical DePt.Date:Time: 180 Minutes

English language examLecturer:Abdullah Hassan

Lect.Ass. Saad Hassan

2012-2013 s-lJJl el,ll - 4il1 a-'J<-: OLi"l

OPTION IAnswer only 4 of the following que-stion-s inclu4ing question No.1

tbj,.', &yl Jli-'ll t{j.,.b? 4!-,1 {qJl oe L.trJl

Q-l: What is the meaning in Arabic of the following vocabulary? 25

I -normal, 2-method,3- immediately, 4-stored, 5-deeply,6- sure,7- hesitate.8- bury,9- burn,

l0-involve,l l- native,l2- promise, 13-prepositions,l4- boring,l5- conversations,

l6- nervous,lT- suppose,l S- totally.lg- practice,20- Instead,2l- effortlessly,22- point of view,

23 -information,24- Possible,25- fl uency.

Q-2: For the excellent English speaking, there are 7 rules...Write them simply. l5

Q -3 : Translate this paragraph into Arabic ? 15

That's why you have to keep repeating again and again. You look at that list and you tryto memorize it. And then the next day you forget and then you go back and you try tomemorize it again and again and again and again and again. And maybe after a very long

time you might remember it. But most likely you're going to forget it, especially long-term. And yet that's the way most students are leaming English and studying vocabulary.

Okay, so the best way to leam grammar is through input. So listening is one form ofinput,Iistening to correct grammar over and over again. Now reading is another form ofinput.And you can use reading also to leam grammar, but you won't use it as much as listening.Most of the time you will have listening as your main form of input. But if you do read,

please do not read textbooks. You should read easy English novels, maybe novels that a

young child would read. But most of your input will come from Listening.

Q-4: Fitl the spaces in the following sentences BY these words. 15

1., repeating 2 immediately.,3 studied.,4. speak,5. ears, 6. conversation, 7. single

8. grammar,9. teachers,l0 - phrases.

l- Rule # I is to always learn Englishindividual words.

, and to never, never study just

2- You do lots of reading and little fake *------------- drills and activities. And thisis the traditional old way of leaming English but we have a totally new and

different way of leaming it.3- When you study just an individual word like a vocabulary, somelhing in a

vocabulary list, or even in your notebook you write one ------------ word and thenyou write the meaning or the translation.

4- Here's another problem with just learning single words. When you study justsingle words. you're not learning any -----------------.

5- I bet you hated studying grammar rules. But you did i1 because your English -__-_-- :_ -_ ----_- made you study them.

6- When someone asks v(?. w;i,'i;;il;il:dil l"ffi::?:; H ,-# ;:i;;Jffi",'",3;:.'lltlLl _ -grammar rules.8- Do not study grammar rures. when you study grammar rules, you think about thegrammar before you __-__-__-___- and then you fr"jtit" U"rir* you speak.9- I mean by listen first? I mean.lea* -iin yor, __-___]]___ una not with your eyes.

,kil,:- thu, to, need ro do is stow down *J;d.o.". l-_____-______ is the mother of

Q5 : Translate this text from Arabic into English language . ls

.itEitt ob ed OJ r,,-.rlt ti :j.j.-j crr:ryt cAr,;J .,JstLJri i-j.J.6tr.I s+j ,rj,. ,..,J*1s! ;r,,JrJ.,le d!i.4rJ;J:J<, ili f .r! u1J.:lt3 93.ilsid,'J.t:;,J..rr,, *a Ot d,j,.r>i OL.i ;iJ'rq'r. )lJ ';\Jlr JJ'r-.iJlj .iBr3 si,3Jr .utsr& ip .r.--irlr qirr:rr

s-a 4J.J*.a rr! $ .6."r ,*.rl. 6l+ll # ol-r.3*.a qli.: ;!LLll3 4gr)13 ,crUlrioyl,r

Answer only 4 of the above questions jncludins ouestion No.1r.b>i J_ryt ,Jt:q.,tr q.:.,;l !t:-r ;*._., ::-EF-

University of Technology - Electromechanical Engineering Dept'

Class: lth YearFinal Exam Sample No(1) - 2012-2013' 1&;-. Time: 3 hr

Subject: ComPuter Science

Examiner: Lect .Abdul Kareem KasimDate:Note: Answer Four Questions

Lect. ivlurooi Nadhom M.Ali

Name: ID No

Ql(A): For the logical oircuit shown below:'1-

Draw the fliw chart to perform the function (G) ofthe circuit

2- Write the outputs for all input probabilities'

A

B

c(7) marks

(B): show what appear after running the following statement:

MsgBox "are you sure you want to delete this file" ' 32 + 4' "delete"

(3) marks

(c): what is advantage and disadvantage of Machine Language' (5) marks

Q2 (A): Write a program-ro -enter

the elements values of the one dimensional anay

A(10) by usrng the tnpuiio*' tft"n nnd the largest value and it's location in the

aray.( 5) marks

(B): Define the meaning of:

Assembler, Multitasking, Instruction Time' Interpreter' Application Software

(C):Write a program to print "the multiplication table" from I to l0'(5) marks

(5) marks

O3(A): Write a program to iind the value of ( S ) from the following equation for

N =5 to 30. Print s f";;;; ""i"" "r'ltt i"'ne Form and Command Click

event to run the Program'

c-Sl/+q\e - / ,\1 ',

(5) marks

Using the Input Box to enrer the values of X and y , Display the Z yahe onthe Form. If there this no solution display " Wrong Values".

(5) rnarks

Q4(A) : Design a Form and write a program to enter two numbers by using two TextBoxes and compute multiplication and division operations using option buttons,and display the result in Red color in third Text Box. Also display the phrase(illegal division operation) in green color when the denominator is zero onMessase Box.

@): Design a Form with List Box, Text Box and three command Buttons, withcode for the following events:I - Add_command event to add items to List Box,2-Index_command event to write the index of item

Selected on Message Box3-Text_command eveni to write the item selected on

Text Box.

(C): Write a program to solve the tbllowing equarion:

^fv *vZ="- ' where X+y>0.X+O

15 t marks

( l0) marks@): Draw a flow chart to find the value of ,S from the followine

equation:

.123na+b (a+b)'1 (a+b,13 ' (a+b),

Q5(A):Design a Form consist of:- Two text Box using to enter two logic values- Three Option Buttons represent three logic operations(AND,OR,XOR)

- Run Command ButtonThen write a program to display the result ofthe logic operationwhich select by Option buttons on third Text Box

@): Explain the different types of memory

(C): Draw a flow chart to find the even number for (N) numbers.

(5) marks

(5) marks

(5) marks

(5) marks

University of TechnologY

Department of Electromechanical Engineering

Supplementary Exan: 2012 - 2013

Subject : Engineering Thermodynamics

First Year

Time Allowed: 3 hrs

Date: /612013Examiners: Lect. Dr. Khalid Faisal sultan

Note: Answer onlY five questions of the followine

:' e tl

Ptr-)

e .1 A turbine operating under steady flow condition receives steam at the following state

pressure 13.8 bar, specific volume : 0.143 m3lKg , intemal energy=2590 kJkg,

Velocity:30 m/s .

The state of steam leaving the turbine is pressure 0'35 bar

Specific volume = 4.37 m3lkg

Internal energY =2360 kJ/kg

Velocity:90 m/s.

Heat is lost to the sulrounding at a rute of 0.25 kJ /sec, find the mass rate of steam flow

if the power developed by the turbine is 102'8 kW' [ 20 M]

Q.2 0.45 kg of a certain gas expands adiabatically until its pressure is halved. During the

expansion the gas does 27 kJ of extemal work and its temperature falls from 220 Ca to

130 C0. Calculate the value ofthe adiabatic index and the characteristic gas constant'

[20 M]

Q.3 A - Show that when a gas has its state changed according PVn : C,then the change of

specific entroPy is given bY :

^ (Y-n'Sz - Sr = Cvft;lin p,

B - Briefly discuss the term reversibility as applied to a thermodynamic process.

[20 M]

Q.a I k_q of steam 0.8 dry at 9 bar expands during a non - flow Polltropic process according

to the law PVl'l = C until the pressure becomes 3 bar. Calculate the finai dryness

fraction. work done and the heat energy transferred'

P

barVg

m3/KgUf

KJ/KeITo

KJ/Kehf

KJ/Kehg

KJ/l(e

J 0.6058 )ol.I) /)4J.e )oi.4/ 2725.3

9 Q.215 7 4r.83 2580.5 742.83 2773.9

[20 M]

University of TechnologY

Department of Electromechanical Engineering

Supplementary Exam: 2012 - 2013

Subject : Engineering Thermodynamics

First Year

Time Allowed: 3 hrs

Date : l6l2013Examiners: Lect. Dr. Khalid FaisaI sultan

Note: Answer only five questions of the following

Q 5. 0.23 kg of gas is taken through a Carnot cycle whose temperature limits are

50 0C . If the volume ratio of expansion of the isothermal is 2.5 . Determine

A. The thermal efficiency of the cycle.

300 "C and

B. The work done cycle. Take R=0.28kJi kg. K [20 M]

beginning of the

15 C'. The heatQ.6 The compression ratio in an air standard Otto - cycle is 8' At the

compression stroke, the pressure is 0.1 MPa and the temperature is

transferred to the air per cycle is 1800 kJ/<g. determine :

1. The pressure and temperature at the end ofeach process ofthe cycle.

2. The thermal efficiency3. The mean effective pressure; use Take R=0.287 kJ/kg. k , ^l :1 .4 [Zi.J Ml

GqOD LUCK

.r UJ-g+^r'JG f .,o ) tjl t'tu-

University of TechnologyElectromechanical Engineering Dept.

Final Exam -Sample No(l)

Time: 3 HoursDate: f3 / 6; / 2013NOTE: ANSWERF.IVE QUESTIONS ONLY

EACH BRANCH HAVE (7) MARKS

Class: First YearSubject: MathematicsExaminer: Dr. Ghada Adel

M.Sc' Karema AssiName:

Q1/a. Solve the system of linear equations using gil@l Gramer's rule or Inverse matrix

4X+42:2+2XY+4 Z= 6

X+ Y-3 Z= -22

b. Finddy

dxfor Y=

(r)v-sec x

Q2l Sotve only two branches from the following:a. Find thi vector 5 unit length in the direction ofvector perpendicular to the plane

which passes through A(1,2,3), 8(3'2'-5) and C(I,4'-1)'

b. Solve the following differentiat equation ' ! - Z! - l*odxx

c. Prove t "t f [cs"- 1 x]=

lxl

Q3/ Solve only @ branches from the following:a. Find the domain and the range then draw the functions :

3+2secx

Q4t

a.

(2) x-2Yb. Evaluate IJt^r, x.sec 4 xdx

c. Find the gradients of the tangents drawn to the circle 2x' + 2y' - 4x - 4y -6et x=2 ,then find the center and radius of this circle with aid of drawing.

f.,l" -*-\/4

b. Solve the following:a. Plot the polar ctrve r-2-2cosd in the range O < 0 < tr 'b. Find the three cubic roots of 7,- -8i in polar and exponential forms .

l* I 31 1tt'.Findthevalueof (k)if l5 -2 ll: J

l-r 2 1l I*2d*

Page I of2

Qs/.x{-x3+x-l

a. Evaluate J r ,,

--dr'x"-x'I zx-t _*,,.|

b. Find thevalue of (b) which make the function/(x) -1A-Z$a* * """'^ -' f ,

f r................... ..........* - 2)continuous at x=2.

Q6/ Solve only two branches from the following:

a. Evaluate jxm(3x +t) ax

t.-_lb. Evaluate l*'\ t - d*'l+Vxc. Find the area of the region bounded by x = 4- !2 and x = _y _2

GOOD LT]CK

Page 2 of 2

Univcrsity of Tcchnologr-Elcctrcncchenicel Engineering Dept.Final Ereminetion (2012-2013)

Class: 1" Year ff,$\ Time: 3 hoursSubject: Besic of Ehctricel Engineering f"] I Date: I lml3Examiner: Dr. Sameir Abd Al-khalik Aziez ilab Note. Answer only 5 questions

Q1)

A. t A cable ftansports power from a generator to a factory i80 meter)away. The factory load is (200 A). The cable core has a resistivir-v-of (.1.724 ir Q cm), and a diameter of (i0 mm). Find the voltagedroo rn the cable?

B. ) When connected to a certain load resistor, the terminal voltageand current of a d.c. source were foturd to be (150 V) & (2 A)respectively. The open circuit voltage of the source is (200 V).Detennine the terminal voltage and current when the source isloaded by a (50 O) resistor? GM;k]

Q.2) For the following circuit diagram, find all source currents?

Q.3) For the following circuit diagram, find maximum power fransfer inthe resistance (R)?

O.E6 V12rl

il F--^w^o.irv so

Q.4) For the following circuit diagram, find Ir, Ii, Iz, Pr, P.F, and draw thephasor diagram?

i2=$.n'.{

R.=4C :.-r=5rn;.r

l1

0 = 83.4 irF

Rz=10O

lr....--l

e=282.85 sin (1000 1) V

Q.5) A (5 hp) motor with 0.6 laggng P.F. and an efficiency of (92 7o), is

connected to a (208 V) and (60 HZ) supply. Suggest a method (with itscalculations) to raise the P.F. of the combined system to unity? Find also

the percentage reduction in the supply current? anffi"1

Q.6) A ring has a mean diameter of (21 cm) and a cross-sectional area of(10 cm1. The ring is made up of semicircular sections of cast iron and

cast steel, with each joint having reluctance equal to an air gap of (0.2

mm). Find the Ampere-huns (total m.m.f.) required to produce a flux of(8x10-awD ). Neglect frineing and

relative permeability's for cast steel

respectively?

leakage effects. Gven that the

& cast iron are (800) & (166)

(Gnd Luchl

University of Technology-Electromechanical Engineering Dept.Final Exam-First Attempt - 20 12-20 | 3

Class : First YearSubject: Engineering and Machine DrawingExaminer : Ass.Prof. Ali Hussain Ali Saeed

Time : 3 hoursDate:27 lg /2013Note:

Name: ID No. Signature

.(d-.Jl 3o)

.e|..;rr. Yl r.,,.iti fj yl r.!l ,,Jc :tr;l g.ail -1 iA)L..Lii lrj,lll -,;LLl f-tl -2

.(4+Jr 20) l:1 3t el+l+ 11) rlJ ds,.t! s.trYl eLr.I p'-tl -1rr

1:1 p-t g,l+l+ (2) rb d9.ttl d 4i;i.ll rl..;p5J gr;rll js-tl grLt ri.a.i urtrYl lt rell f.ll -2rr

LD&

-.yJlo.1" 1 *-

d36

University of Technology-Electromechanical Engineering Dept.

Final Exam-First Attempt - 2012-2013

Class: 7st VearSubject: lvl2afi. 'en g.Examiner : u

Time : 3 hoursDate: I 12013{2i,, AnEu e;" ;4t {tve 7ues.

Nu..,Dr knqil lbrqh;^ IDNo.

QI 20

.\Al2lL tn order to raise the flagpole OC ,a light frame OAB is attached to the

pole and a tension of 780 N is developed in the hoisting cable by thepower winch Drcalculate the moment Mo of this tension about the

hinge point O.

83 t The block-and tackle system is released from rest with all cables taut.Neglect the mass and friction of all pulleys and determine the

acceleration of each cylinder and the tensionsTl and T2in the twocables, (Blrnov e Jow4

Q.'/, Oetermine the moment of inertia of the shaded area fig with respect to 2ox-axts.

The uniform beam has a mass of 50 kg per meter of length. Compute thereactions at the support O. The force loads shown lie in a vertical plane.

I 6 ' The pilot of an airplane carrying a package of mail to a remote outpostwishes to release the package at the right moment to hit the recoverylocation (A ) . What angleOwith the horizontal should the pilot,s line ofsight to the target make at the distant of release? The airplane is flyinghorizontally at an altitude of 100m with a velocitv of 200km/hr.

a,

Signature -fUS 4V

Determine the tension P in the cable which will give the 50kg bock a

steady acceleration of 2m/s2 up the incline'

lo

University of Technology-Electromechanical Engineering Dept.

Final Exam-First Altempt - 2012-2013

curr, lstqeqv'xftject: [Vls{4- e4f "

I Time:3hours

Exaniner :

Dale: I 12013iii., frnsn'er'Uily l,nu c7wes.

Name, fp. ISnar'/ TbYwhiwlnNo. Signatwe,-_+

-b62 2U.-"\ A^e 6L a. VY I

Q.s 8"//

a_)oo kyhr e.6.,

P ro*

lorv->!* 2o,. ---l

;-- 1 s 'n --J_-; Y0.6 n,

0.6 m .30'\