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(04 Marks)

(D) Li-Mno,

(D) Ni- MH

First/Second Semester B.E. Degree Examination, June / July 2013

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2 a. Choose the correct answer :

i) Which of the fbllowing is a reserve battery(A) Zn - Air battery (B) Ni - MH battery (C) Zn- Ag2O

ii) Which of the following is used in cellular phones(A) Zn MnO2 (B) Zn- atr (C) Pb - acid

b.

c.

d.

Engineering Ghemistry

Time: 3 hrs. Max. Marks:100

Notetl. Answer FIVE full questions choosing at least fu,oflom each part,2. Answer all objective type questions only in OMR sheet page 5 of the Answer Booklet.

3. Answers to objective otpe questions on sheels other than OMR will not be valued.

PART. A

a. Choose the correct answer : (04 lvlarks)i) The driving force for a red - ox reaction in a galvanic cell is due to

(A) AG : -rEF (B) AG : nEF (C) AG = $ (D) None of theseii) The standard reduction potential ofZn and, Fe are -0.76V and -0.44V respectively. The

emf of cell formed by combining the above two electrodes will have(A) 0.32v (B) -0.32v (C) -1.2v (D) 1.2v

iii) When the concentration of chloride ion is silver - silver chloride electrode increases,the reduction potential ofthe electorde(A) increases (B) decreases (C) does not alter (D) None ofthese

iv,1 Calomel is the commercial name of(A) Mercuric chloride (B) Mercurous chloride(C) Mercuric sulphate (D) Mercurous sulphate

b. Define single electrode potential. Derive Nerst's equation for single electrode potential.(06 Marks)

c. Describe the construction and working ofcalomel electrode. Write its advantages. (06 Marks)d. The emf of the cell Cu/CuSo4 (0.01M) 11 CuSo+ (x M) / Cu is 0.0295V ar 250C. Find the

value of x. (04 Marks)

iii) The fuel cells are more superior than the conventional batteries because(A) They are light in weight (B) They are not eco friendly(C) They produce direct current at low cost(D) They are easily fabricated

iv) \n Zn Air battery, the cathode of the cell is(A) Graphite (B) Air / C (C) Zn/Ak (D) Air/KoH

(06 Marks)Describe the construction and working of lead - acid battery.What are fuel cells? Describe the construction and working of a CH:OH - Oz fuel cell.

(06 Marks)Explain the following battery characteristics i) Energy efficiency ii) Cycle life.

(04 Marks)

I of4

a. Choose the correct answer :

i) Insoluble corrosion product formed during corrosion process leads(A) To prevent further corrosion (B) Has no effect on conosion(C) To enhance further corrosion (D) None ofthese

ii) At high hydrogen over voltage, the rate ofcorrosion(A) Increases (B) Decreases

(C) Increases initially and then decreases (D) Remains the same.

iii) Whiqh of the following factors accounts for lower corrosion rate(A) 'Large anodic area and small cathodic area

(B) Small anodic area and large cathodic area

(C) High temperature(D) Hieh humidity

iv) Caustic embrittlerii6nt is a classic example of(A) Differential aerifion corrosion (B)(C) Differential metalcorrosion (D)

(A) Oxidising agent(C) Anode

Stress corrosionNone ofthese

(B) Reducing agent(D) Electrical energy

t0cIIBtzl22

(04 Marks)

(06 Marks)

(04 Marks)

(06 Marks)

b. What is corrosion? Explain the electrochemical theory of corrosion with respect to fuon.(06 Marks)

c. Explain the tlpe of corrosion occurriliin the following cases.

i) Presence of small dust particles o.niron surface for a long time.ii) Copper nut is contact with iron bolt. (06 Marks)

d. What is anodizing? Explain the anodizing of iUuminium. (04 Marks)

a. Choose the correct anslveq::: (04 Marks)i) The experimentally. determined discharge potential of an electrode is 2.57V and its

theoretical disctiarge potential is 1.53V, then over voltage is

(A) 3.345y.i .' (B) - 1.04V (C) 4.10V (D) 1.04v

ii) Electroless plating process is possible only on(A) Catalytically active surface (B) Inactive surface

{C) Any surface (D) None ofthese

iii) Which of the following is essential in electroless plating

iv) Driving force in electroless plating process is(A) Power supply (B) Oxidising agent(C) Auto catal).tic red-ox reaction (D) None of these

b. Explain the following factors influencing the rate ofelectro deposit.i) Current density ii) Wetting agent iii) pH

c. Discuss the process ofelectroless plating ofcopper.

d. Explain the terms : i) Decomposition potential ii) Over voltage.

2of4

t0clJr,t2t22

PART_B

a. Choose the correct answer : (04 Mar\s)i) Zone refining technique for purification of solar grade silicon is based on

(A) Henry's law (B) Newton's law (C) Partition law (D) Phase rule

Which of the following is not a secondary fuel?(D) Nalu-iz.l€as(A) Coal gas (B) Water gas (C) Producer gas

Methyl tertiary butyl ether is added to the gasoline to(A) Increase the octane number (B) Minimizing knockihg(C) Increase the efficiency ofIC engine (D) All the above

iv) Catalysts used in catalJtic converters are .-,r:,

(A) Pi, Pd and Rh (Ei) Ni, Co and Cr (C) A/zOr.a@SiOz (D) Zeoliteb. What is knocking in lC engines? Explain its mechanism with chemical reaction. Mention jts

ill effects. (06 Marks)

i)

iil)

c.

d.

What is meant by cracking? Describe the bed catalytic cracking process. (06 Marks)

(04 Marks)Calculate the calorific value of a sample of coal ftom the following data:

Mass olcoal -095s""-bMass of water in coppei,cAlorimeter : 20009Water equivalent of calorimeter = 7009Rise in temporature = 2.8oCSP. heat of water = 4.187 HlkgpC

a. Choose the correct.answers : (04 Marks)i) In flame photoinetry, the emitted radiation lies in

(A) IR range (B) uv range (C) Visible .unry',., ,

(D) None of these..:.

ii) In the. estimation of FAS by potentiometry the indicator electi6cli-used is(A) Silver-silver chloride electrode (B) Platinum electrod€ ..'.,-(C) Calomel electrode (D) Glass electrode

iii) Lambert's law states that intensity of monochromatic light decrease exponeiitially with(A ) Concentration (B) Path length (C) Time (D) Density

iv) Gibb's phase rule is applicable to

b. State the phase rule and explain the terms involved with examples.

d. Write brief note on conduct metric titrations.

(A) Heterogeneous systems(C) Homogeneous systems

(B) Heterogeneous systems is equilibrium(D) Att of these

(06 Marks)

(06 Marks)

(04 Marks)

3of4

t0cIIEtz/22

7 a. Choose the correct answers : (04 Marks)

i) Natural rubber is the polymerized form of(A) Chloroprene (B) Isoprene (C) Propene (D) Stltene

.. . ii) A polymer of high optical clarity used in preparation of lenses is.t'' (A) Teflon (B) Phenol formaldehyde (C) Neoprene (D) PMMA

iif)r J{Ihich one among is a conducting polymer'(Al,anitine (B) Pyrrole (C) Polyacetylene (D) Acetylene

iv) Veryhi!! molecular weight polymers will have,(e) lornQr-.. (B) High Te (C) Moderate Tg (D) No Tg

b. What are polymeri.{ir..iscuss the fiee railical mechanism of polymerization of ethylene.

c. Give the synthesis and an application of, i) Butyl rubber ii) PMMA. [3:ffi:[]d. Describe the synthesis and applications of Kevlar fibre. (04 Marks)

.,;':..a. Choose the correct answers ' :,. .. (04 Marks)

i) Secondary treatment of sewage islarrie! out to reduce,(A) Organic load (B) Inorganiiilbad (C) Destroy microorganisms (D) None of these

ii) Complexing agent for sp--e-4r.ometric analysii.of nitrates is,(A) SPADNS (B)Ammonia(C) Phenol Sulphonic acid (D) Phenol disulphonic acid

,.iiii) The method used;for desalination ofwater is,

(A) Zeolitep-ocess (B) Lime-soda process(C) Ion-efelitinge process (D) Reverse oimosis process

iv) Thp..lnticator used for the estimation of total hardness of a gii,en water sample byEDTA method.

-... (A) Starch (B) Eriochrome black-T (C) Fenoin (D) Methyle orange

b. What is desalination? Explain the desalination of water by electrodialysis (06 Marks)

c. Explain the argentometric method of determination of chloride in water. Write the reactionsinvolved.

d. Explain the terms: i) BOD

(06 Marks)

(04 Marks)ii) coD.

4of4

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Time: 3 hrs.

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cy 2"-r cos(nnl2-zx) oy z"*r cos(nnl2-2x)

(06 Marks)

(06 Marks)

(04 Mark)(04 Marks)

. (06 Mark)

three dimensional Cartesian coordinates to(06 Mark)

ii) If F=3x2i-xyj+(a-3)xzk is Solenoidal then aisequal to A)0iii) lf F=(x+y+1)i+.j-(x+y)k then F.curlF is-. e) O B) x+yiu) The scale factors for cylindrical coordinate system (p, {, z) are given by.'l

A) (p, l, l) B) (1, p, 1) c) (1, l, p)

Choose your answers for the following :

i) If i=xi+yj+zk ttren div R

Prove that curlA = g rad(divA) - V2A .

Find the constants a, b, c such that the vector

A)0 B)3 C) -3

D) none ofthese(06 Marks)b.

c.

First/Second Semester B.E. Degree Examination. June/July 2013Engineering Mathematics - I

Max. Marksil00Notet I. Answer any FII/E full queslions, choosing at least tteolrom eacl, parl

2. Aneeer all objective type queslions only on OMR sheel page S ofthe answer booklet.3. Arr$tef lo objectire Upe quesliorrs oh sheels other lhan OMR toill ,iol be talued

PART _ Aa. Choose vour answers fbr the followins :

r) lt ) : J- then yn rs e1 (3log s)'e5. ny (s log:)" e5"

ii) If y = s652 x then yn is

e1 2"*r cos(nnl2+2x) s1 2'-rcos(nnl2+2x)

iii) The Lagrange's mean value theorem 1b. the firnction f(x) = g* il the inteNal [0, l] is

A) C:0.5413 B)C= 2.3 C) 0.3 D) None ofthesc

iu) Expansionof log(l+e")inporversofxis_. A)log2-x/2+x2/8+xa llg2+-

B)log2+x/2+x2l8 - xn ltg2+- c)log2+x/2+x2l8 +xn 1192+- pJ roez-I-}1-,I1* -'28t921',. tryr;,+y-],i,=2xprorethat(x2-l)yD+2+(2n+l)xy,,+r +(n2-m2 1y,, =0. (06 Marks)

c. Verily the Rolle'sthcorem lbr the tunctions: l (r) = ?'(sin r - cos x) in (rrl4,57rl4). (06 Marks)

d. By using Maclaarin's theorem expand log sec x up to the term containing x6, (04 Mark)a. Choose your ansrvers lor the lbllouing : (04 Mark)

i) The indeterminate tbrm of 1i6 u'd;, at 1og\y^) at log(/b) c) I D) -lx+0 X '

ii) The angle between the radius vector and the tangent-for the curves r = a(l - cos0) is

L) 0t2 B) -0 l2 C) 1rl2+0 D\ n/2-0/2.iii) The polar lbrm oia curve is A) r = f(e) e) 0 = f(y) C) r = f(x) D) None ofthese

i!) Therateatwhichthccurveisbendingcalled_,A)Radiusofcurvaturel B)Curvature: C) Circle ofcurvaturei D) Evaluale.

,lf'aluate ;;61

s'n t l .\ .01 \

Find the angles ofintersection ofthe f-ollor\ ing pairs ofcurves. r = aO(t+ 0): r=a/(l+e2).Find the radius ofcurvature at (3al.2, 3a12) on xr +yr =3axy.Choose your answers for the following :

i) II' u = x' I )' rhen (i"u) (Cxf,) is equal to A)2 B)0 C) 2x D\ 2y

ii) If z= f(x, y) where x = u-vand y= uv then (u+v)(62l6x)isA) u(Azlev\-v?zlAi B)u(62l6\r)+v(dzl6v) q Azleu+Azttu D1 dzldu-dztdv

iii) If x : r cos 0, y: r sin O then [6(r,0)]/[d(x, y)] is A) r B) th C) .1 D) -liv) In errors and approximations ax /x. fo/y, 6flf are called

A) relative error B) percentage error C) error in x, y and f D)-none ofthese

lf x'yt "' =c.showthat A'.z-l 6x4, = -[xlogex]

r,whenx=y=2.

Obtain the Jacobian of 6(x. y, z)/flr. 0. $) lbr change of coordinate liomspherical polar coordinates.In estimating the cost ofa pile ol bricks measured as 2mx l5mx 1.2m. the tape is stretched +l7o beyond the standard l€ngth.If the count is 450 bricks to I cu.cm and bricks cost of 530 per 1000, tind the approximate error in the cost. (04 Mark)

F- (r -) +az)i .(bx I 2) -z)j , (x r cy r 2z)k is imotational.(06 Marks).

Derive an expression lor V .A in orthogonal curvilinear coordinates. Deduce V . A is rectangular coordinates.

1.,t2 (04 n{arks)

(04 Marks)

c) (s tog 3f " e5' or(stog3)"e-"

(04 Mark)

D)2B) -2 C) 2 D)3

C) x+y+z D) x y

5a.

.c.

d.

6a.

b.

c.

d.

7a.

c.

d.

8a.

PART - BChoose your answers for the following :

i.1 The valueof"J"-.,r, is A) leJ- -'

ii) An integrating factor for ydx - xdy = 0 is A) /y B) y/x C) l(xy)iii) The differential equation satisrying the relation x : A cos (mt o.) is

A)(dvdo= I -t' B) (d'?x/de) - d2x C) (d']x/df) = m2x

iv) The orthogonal tnljectories ofthe system given by r = a0 is

IOMATI I(0,1Mark)

D) -llu

D) 18/35

l \ l ,\Solve (l-y2)-(x-e'd )Jdy dx=0.Prove that the system ofparabola f = 4a (x + a) is selforthogonal.

Choose your answers for the following :

find the inverse tran sform ati on s.

TR o ,lDiagonalizethematri*. n_l-o z 01.

l, 4 r]Reduce the quadratic form, xf +Zxl-lxl -rr,riitJii, into sum ofsquares.

2 ot2

A) AX : l.x B) i,(A-x)=0 C) xA- A1. = o D) la-rrlx=oiu) Two square maffices Aand B are similar if, A) A=B; B)B:P-rAP; C)A'=B';D) A-r =B-

Show that the transformation, yt=2x1-2x2-x1, y, =-4xr +5x2 +3xt, yl -xt -x2 -x., is, regular and

(06 M{rks)

(06 Mirks)

(01 Marks)

(01 iUarks)

D) cos (y/x) : cD) l/(x':+f )

D) (dx/dt) : -m:x

D)12:1"-e'(06 Mark)

(06 Marks)

(04 Mar|(s)

(01 lt{ arks)

(06 Marks)

(06 Nlarks)

(04 Marks)

A)r2: keo B)r=keo c)l e-8'=pSolve (x cos(y / x) + ysin(y/ x))y - (ysin(y/ x) - x cos(y/ x)) x (dy / dx) = 0.

B) - l/e C) l/a

tt2ii) The valueofthe integral fsinTxdxis A) 35/16 B)16/35 C)-16135)0

iii) The volume generated by revolving the cardioid r = a(1 + cos 0) about the initial line is

A) (3ra2)/8 B)(37ra3)/8 C)(2ra'1) 19 D)Noneiv) The area ofthe loop ofthe curve r = a sin 30 is _ A) a'?l12 ; B) nll2: C) na'?ll2 ; D) None

r/lb. By app lying d i fferentia I underlhe integral sign evaluate 'ilo8l I+),srn)rro^.

;srnY

Evaluale of fsin n \ dx where n is any integer.J

findthe leng:h ofthe arch ofthe cycloid x=a(0-sin0); y:a (1 - cos0); 0<0 (2r.Choose your answers for the following :

i) The goneral solution ofthe differential equation (dy/dx)=(y/x)+tan(y/x) is

A) sin (y/x) : c B) sin (y/x) : cx C) cos (y/x) : cx

[] -r 2li) Find the rank of I '. .' ^1, A} 3 B) 2 C) 4 D) I-,'-|l-l I 2l

ii) The exact solution of the system of equation lOx + y + z : 12. x + 10y + z = 12, x + y + l0z = 12 byinspection is equal to A) (1, l, l) ; B) (1, l, 1) ; C) Cl, -1, -l) ; D) None

iiD If the given system of lillear equations in 'n' variables is consistent then the number of linearlyindependent solution is given by A)n ; B)n-l ; C)r n ; D)n r

iv) The trivial solution for the given system ofequations 9x-y+42=0,4x 2y+32=0,5x+y 6z:0isA) (1,2, 0) B) (0,4, l) c) (0,0, 0)

?],1, ,r;9,Using elementary hansformation reduce each offollowing matrices to the normal arr,

| ] ,, , ,

| ,* ,,.*r

l, ,,r]Test for consistency and solve the system. 2x + y + z=10,3x +2y +32-18, x + 4y +gz=16. (06 Mark)

Appii Gauss-Jordan method to solve the system of equations, 2x+5y+72=52, 2x+y-z=0,)\+y+z=9 (04 Mirks)

Choose your answers for the following : (04 Mark)

i) A square matrix A is called orthogonal if, A) A=42 B)A=A-r C) AA-r =l D)None

iD The eigen values ofthe matrix. I u, -,t t,l ,r" A) 2. 3. 8 B) 2,3,9 C) 2,2, 8 D) None

| , -, ,iii) The eigen vector X ofthe matrix A corresponding to eigen value 1" and satisry lhe equation,

t B \.f I L l=L- C o 1 \USN 1occPt3t23

First/Second Semester B.E. Degree Examination, June/July 2013

Gomputer Goncepts and C Programming

Time:3 hrs. Max. Marks:100

Note: 1. Answer any FIVE full questions, choosing at least tteo from each parl2. Answer all objective type questions only in OMR sheet page 5 of the answer booklet3, Answer lo objective gpe questions on sheets other thsn OMR will not be valued.

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PART _ A1 a. Choose the correct answers fbr the following :

i) The term dots per inch (dpi) relers to printer'sA) resolution B) speed C) output

is used to identily produc{ and provide information such as price.ii)B) Ba.r code readerD) Light sensitive detector

B) High level languageD) Machine level language

(04 Marks)

D) colours

(06 Marks)

(04 Marks)

(04 Marks)(06lVlarks)

b.

c.d.

A) Price checkC) Numeric digit

iii) is not a computer language.A) Assembly languageC) Natural language

Convert the following:i) (10101), :( ?)ro:( ?)ro

iu) Which operating system first appeared with IBM PC?A) Windows B) Linux C) Mac OS D) DOS

What is information processing cycle? Explain four steps with flow chart. (04 Marks)With a neat diagram, explain lunctions of each units of basic model of computer. (06 Marks)

a. Choose the correct answers for the following :

D _ is two or more LAN's connected together across large geographical area.A) GAN B) LAN C) WAN D) MLAN

ii) Temporary storage in main memory is called as

A) BufferC) Tirtary memory

B) Secondary memoryD) None ofthese

iiD Which of the following unit represents largest amount of data?A) Kilobfe B) Terablte C) Gigable D) Megable

iv) Identif-rcation number of every computer connected to internet is _.A) Sub net mask B) Gate way

Explain basic components ofa network.C) MAC address D) IP address

b.

c.d.

3a.

Define operating system. Discuss functions of operating system.

Choose the correct answers for the following :

i) The number 0987 is _ integer.

iD What kind of language is C?A) Machine languageC) Assembly language

Explain working ofhard disk with a neat diagram. Give advantages and disadvantages.

A) octal B) decimal

(06 Marks)

(04 Marks)

C) hexadecimal D) invalid

B) Procedural languageD) Object oriented language

1 of3

3 a. iir) The result after evaluating the expression 112 * 4 isA) 0.2s B)2 Q)0

iv) What is the output if following program executed?main ( ){

print("%d", 'A');)

A) 6s B)A c) "A"b.. Explain software development and life cycle.c.'- What are identifiers? Discuss the rules to be followed while

exampies.

data types.

4 a. Choose the coffect answers for the following :

i) An operator which acts on two operands to produce result is

A) ternary B) binary C) unaryii) The modulus operator (%) can be used only for _ values.

d. Explain format specifiers used in scanf( ) function to read unt, float, char, double and longint

A) floatingC) both integer and floating

iiil In C, TRUE is represented by

B) integerD) all data type

C) non-zero D) 1

iii) i%: t/3

10ccP13i23

D) 0.12s

D) ElTor(04 Marks)

naming ideirtifiers. Give(06 Marks)

(06 Marks)

(04 Marks)operator.

D) complex

+igive flow(06 Marks)

(10 Marks)

(04 Marks)

D) char

D) actual

D) blank space (.b)

b.

A) true B) zeroiv) Which of the following is not valid assignment statement?

A)i+j=23 B)j-23 C)j+:23 D)j=23Write C program to swap values of twci integers without using third variable and

chan lor the same.Find the result of each of the following expressions with i: 4, j:2,k: 6, a- 2.

i) kx:i+jiv) m-i+(i :2+k)

ii) j:i/:kv, a= i*(11 =W2)

PART - B5 a. Choose the-correct answers for the following :

i) In c, .default return type of function isA) void B) intParameters used in function call are

A) formal B) localEvery C program must haveA) user defined functionC) main function

ii)

iii)

b.

c.d.

C) floatparameters.

C) dummy

B) standard functionD) library function

ir) Arguments of a function are separated withA)comma(,) B) semicolon(;) C) colon(: )

Write C program to print n fibbonacci numbers using function. (08 Marks)Differentiate call by value and call by address parameter passing mechanisms. (04 Marks)

Explain the scope of local and global variables with simple example. (04 Marks)

6 a. Choose the correct answers for the following :

i) break statement can be used in

-.A) if B) if - else

2 of3

C) nested if D) while

(04 Marks)

6 a. ii) Which of the following is not comparator operator in C?A)< B)> c):

iii) What is the output if following loop is executed?lbr (i : 1; i < 5; i++); printf ("VTU");

A) syntax errorC) VTUVTUVTUVTU

A)1C) depends in size of array

B) VTUD) VTUVTUVTUVTUVTU

B)0D) not fixed and assigned at run-time.

10ccP13/23

D) !-

D) none ofthesei+',.i

ir) while (0) {printf ("CCP")}, how many times this loop will execute?A)0 B)1 C1 error D) infinite times

b. Write C program to find roots of quadratic equation. Consider all possible cases of roots.(06 Marks)

c. Write C program to evaluate tbllowing expression:

7 a. Choose the corect answers for the following :

i) The subscript of hrst item olan array in C is always _.

(04 Marks)

(04 Marks)

2ttanswer - l+x*I-+I-., x

+........ using function. (06 Marks)2t 3t. 4l "d. Dilferentiate pre-test and post-test loops. Illustrate your answer with a suitable example.

ii) ln a rariable length string. the string ends with delimiter.

A) \n B) \o c) \Iiii) Which of the fbllowing is correct declaration of anay in C?

A) int marks [3 + a];C) int marks [2 2];

iv) ASCII stands for

B) float marks [5.5];D) int marks [5];

A) American Standard Code for International InformationB) American Standard Company for International IntegrationC)American Standard Code lor lnternational lntegrationD) American Standard Code for Information Interchange.

b.

8a.

Write C program to search an element from unsorted list using binary search. (12 Marks)What is the difl'erence between a character and a string containing a single character?

B) accurate C) completeSingle sequential llow ofcontrol within a program isA) thread B) instruction C) program D) none ofthesePOSIX stands forA) Preliminary Operating System Integration for extended system--B) Portable Operating System Interface for UnixC) Preliminary Operating System lnte.Ace ior Un;* .-. ,, , r

D)Por1ableoperatingSystemIntegrationforUnix.ir)

A) Application Programming Interface B) ApplicationC) Application Processing Interface D)Application

Explain motivating lactors for parallelism.,, ": .. -r' ,

What are Open MP directives which help in synchronization o;f task? Explain.ii; l':$r'

* * * x )F ,F].

3of3 :'

Choose the correct answers for the following :

i) Parallel computing isA) serial

execution of instructions.

(04 Marks)

(04 Marks)

D) sequential

Information(06 Marks)(04 Marks)(06 Marks)

ii)

iiD

b.

c.d.

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Max. Marks: 100

First Semester B.E. Degree Examination, January 2013

GOUPUTER AIDED E1{GI1{EERI]{G DRAWING

Time: 3 Hours

Nole: I . Answer three full questions3. Drow to octuol scole

2. Use A4 sheets supplied4. Missing doto moy be ossumed

1. a. A point is 30 mm in front of VP 20 mm above HP & 25 mm in front i behind / from LPP.

Draw its Projections and name the side view. (10 Marks)

b. A line AB has its end A 20 mm above the HP and 30 mm in front of the VP. The otherend B is 60 mm above the HP and 45mm in front of VP. The distance between endprojectors is 70 mm. draw its projections. Determine the true length and apparentinclinations. (20 Marks)

A rectangular plate of negligible thickness of size 35x20mm has one of its shorter edges inVP with that edge inclined at 40o to HP. Draw the top view if its front view is a square ofside 20mm. (30 Marks)

A pentagonal pyramid 25 mm sides of base and 50 mm axis length rests on HP on one ofits slant edges. Draw the projections of the pyramid when the axis is inclined to VP at 45o.

(40 Marks)

A square pyramid of side of base 45mm, altitude 70mm is resting with its base on HP withtwo sides of the base parallel to VP. The pyramid is cut bf a section plane which isperpendicular to the VP and inclined at 40' to the HP. The cutting plane bisects the axis ofthe pyramid. Obtain the development of the lateral surfaces the truncated pyramid.

(30 Marks)

A cone base diameter 45mm and height 65mm is placed centrally on the top face of apentagonal prism side-4smm and height 35mm. Draw the isometric projection of thecombination. (30 Marks)

or

1

or

3

/sqEIzl

I]SN 1OELNI5/25

First/Second Semester B.E. Degree Examination, June/July 2013Basic Electronics

Time: 3 hrs. Max. Marks:100

Note:1. Answer any FIVE full questions, choosing at least two from each part,

2. Answer all objective Q)pe questions only on OMR sheet page 5 of the answer booklet.3. Answer to objective type questions on sheets other than OMR will not be ,'t lued.

PART - A

o.

e

'a

'7+t.

nd)

agoi

A,i

^tcco!J=

oi:N

z

Eao.E

I a. Choose the correct answers for the following :

i) When lbrward - biased, a diodeA) blocks current B) conducts cunentC) has a high resistance D) drops a large voltage

ii) The knee voltage ofa Silicon diode is

A) 0.3 V B) 0.s v c) 0.7 v D) None of theseiii) The ripple factor ofhalfwave rectifier is about _

A) 40.6 B) 0.46 C) r.21 D) 81.2iv) The rms value of a load current ir case of a full wave rectifier is

A) ,I B)]' C) g2 2 ^12b. Deduce the following for HWR

i) I,,". iD Id" (04 Marks)c. With a neat circuit diagram, gxplain the working principles of full wave bridge rectifier.

(06 Marks)

D)-lI11l

(04 Marks)

: 0.48 and(06 Marks)

(04 Marks)

d. Draw the circuit of full wave rectifier and show that the ripple factorefficiency - 8lo o.

2 a. Choose the correct answers for the following :

i) The current relationship between two current gain in a transistor is

A) B - , 0

l-0

c) B=l oI+(x

ii) The 0a. ofa transistor is itsA) current gainC) power gain

iii) In a transistor the curent conduction is due to

B) p=i+

D) s=0+lp

B) voltage gainD) internal resistance

carries.minorityNone ofthese

A) majorityC) both (A) and (B)

iv) In a transistor circuit,A) Ie:lc B)lr>lc

B)D)

C)IE<IC D) Ir << Icb. Draw input and output characteristics ofan NPN transistor in common base configuration

and explain. (08 Marks)c. Calculate the value oflc , Is and pa" for a transistor with cr: 0.99 and Ie: 110 pA.

(04 Marks)(04 Marks)d. Obtain the relation between 'cr6"' and'p6"'

1 of3

3 a. Choose the correct answers for the following :

i) The intersection ofa dc load time and the output characteristics ola transistor is calledA) Q - pointC) Operating point

ii) For an emitter follower, the voltage gain isA) unityC) less than unity

A) fixedC) voltage divider

iv) In self bias or emitter bias circuit' A) inductor

C) resistor

B) Quiescent pointD) All of these

B) greater than unityD)zerc

B) collector to base

D) None of theseis connected between emitter and ground

B) capacitorD) transformer

10ELN15/25

(04 Marks)

(04 Marks)

D) Fourpoint

D) conducting

D) None olthese

D) UJT,characteristics and explain

(10 Marks)as a relaxation

(06 Marks)

iii)The best biasing stability is achieved by using _ biasing circuit.

b. Explain the concepts ofbase bias techniques using NPN transistor. (10 Marks)c. Calculate the Q - point values for the circuit of collector to base circuit. Given

RB : 100 KCr, Rc = 10 KO, Vcc: 12 V and 0a": 100. (06 Marks)

4 a. Choose the correct answers for the following :

i) A SCR hasA) one

A) negativeiii) The FET is a

A) current

number of layersB) two C) three

ii) The minimum point in VI characteristic of UJT is known as

B) valley C) latchingcontrolled devise

B) voltage C) poweriv) The relaxation oscillator uses

A) MOSFET B)SCR C)BJTb. Draw two transistor equivalerrt circuit of SCR. Also plot V - I

various regions of operatiqns.c. Explain with suitable diagram and waveforms, how UJT can be used

oscillator.

5a.

PART_B

Choose the correct answers for the following :

i) Oscillator uses _ tlpe offeedbackA) positive B) negative C) both

ii) A phase shift oscillator has

A) tluee RC circuits B) tkee LC circuits C) a T - type circuitiii) The frequency of Hartley oscillator is f: _

(04 Marks)

D) None of these

D)antypecircuit

D)l2rl C

c) -+2 nr/C

c.d.

2r^lLCB)l

27rJRC

iv) The upper and lower critical frequencies are sometimes called theA) power frequenciesC) 6 dB points

B) half power frequenciesD) None ofthese

Explain with a neat diagram, the working of single stage RC coupled amplifiers with itsfrequency response. (08 Marks)Give any four advantages ofnegative feedback in amplifier. (04 Marks)In a colpitts oscillator, if the desired ffequency is 800 KHz, determine the values ol L andC"q if C; : Cz : 10 picofarad. (04 Marks)

2 of 3

6a.

d. Give any four applications of CRO.

7 a. Choose the correct answers for the following :

A) transmitterC) none ofthe above - ,.-

iii) The 2's complement of 1010 gives :

A) 1111 B) 0110

A) NOT

Choose the correct answers for the following :

i1 The CMRR is given by -

A) A,a x A" B) &/ Ad C) Ad /A"ii) The gain of the inverting amplifier using Rr: 10 KO and Rr =

A)-10 B) -11 c) 10

C) negative

lKQisD)

l':.

B) receiverD) between transmitter and receiver.

c) 0010

10ELN15/25

(04 Marks)

D) 20 log A" /Aa

D) 0101

(04 Marks)

11

iii) The gain of the voltage follower is _A) zero B) infinite D) unity

iv) The screen of CRT is coated withA) chromium B) phosphor C) carbon D) germanium

b. Calculate the output voltage of a three input summing amplifier : Given Rr = 200 Ka,Rz:250 KQ, R: : 500 KO and &: 1 MO, Vr = 2V, Yz:2Y and Vr = 1 V. (06 Marks)

c. Show, how an op amp can be used as an integrator. Derive an expression for output voltage.(06 Marks)(04 Marks)

(04 Marks)

D) None oftheseA) lower than B) higher than C).gqual toii) The modulation is done in

i) The modulating frequency is carrier frequency

b.c.

d.

iv) In binary numbers, shifting the binary point one place to rightA) divides by 2 B) decreases by 10

C) increases by 10 D) multiplies by 2With suitable block diagranr, explain the function of superheterodyne receiver. (08 Marks)

Convert (ABCD)r6: ( )r:( h:( )ro:( )eco (04 Marks)Subtract : (28)ro - ( 19)ro using both 1's complement and 2's complement methods.

(04 Marks)

8 a. Choose the coftect answers for the following :

i) When demorganis theorem apptied to iA + B), we get

A) A+B B)AB C)Aii) Y-AB+BA is a Boolean expression for

A) EX-ORc) Ex-NoR

iii) The example for universal gate isB) NOR

iv) The expression for half adder cany'C'with inputs'A'and'B'A) A+B B) AB C)AB

b. i) Realize the NAND gate using minimum number of NOR gates

ii) Simplify M =XYZ+XYZ+ z<y and realize using of NOR gates.

D)B

B) EX _NANDD) none ofthese

c) oR D) ANDis given by

D) none ofthese

(08 Marks)c. Realize a full adder using two half adders and an OR gate with truth table.

.,,,,,.. .--;,,

_(Q.8. Marks)

,,,/l'|'< 'j6-'

3 of3

USN 06ELN15/25

uFig.Q3(c)

B) feedback resistor C) base resistor D) none oftheseindependent of temperature variation or variation in transistor

E

I

-^t

.9.\

"ob

'.o

,,:

E=

z

oE

Basic ElectronicsTime: 3 hrs- Max. Marks:100

Note: 1. Answer any FIW full queslions, choosing at least two from each part.2. Answer all objective type questions only in OMR sheet page 5 of the answer booklet.3. Answer to objective 4)pe questions on sheels other than OMR will not be valued

PART _ AI a. Choose the corect answers for the following : (01 Mark)

i) Forward cut-in voltage ofSilicon diode is

A) 0.3 V B) 0.2 V c) 0.6 v D) 0.8 Vii) A Zener diode can be used as

A) regulator B) rectifier C) amplifier D) oscillatoriii) The ripple factor of half wave rectifier is _. A) 0.48 B) 0,64 C) 0.81 D) l.2liv) A semiconductor has _ temperature coefficient ofresistance.

A) positive B) negative C) neutral D) none ofthese(0,1Markr)(06 Mark)

Load current 11 : 20 mA;(06 Mark)

(01Nlark)D) fourD) zero

D) none ofthese

DC input voltage V; : 20 V ; DC output voltage V" : l0 V;

A) not biased B) revetse biased C) forward biasediv) Common collector arrangement can be used for _ application.

A) high liequency B; audio frequency C) irnpedance matching D) none oftheseb. Explain the input, output and curent gain characteristics of common base configuration and also explain the

concept of punch through. (08 Mark)c. Define Q-point and DC load line. For the circuit sho\4'n in Fig.Q2(c), draw DC loadline and Mark Q-point.

Assume p : 100, neglect VsE. (08 Mark)

First/Second Semester B.E. Degree Examination, June/July 2013

b. Explain the V-l characteristics ofa Silicon diode.c. Explain the circuit of full wave rectifier and show that ripple factor is 0.48.d. Design a Zener diode voltage regulator to meet the following specifications:

Minimum Zener current l,n,i": l0mA; Maximum Zener cunent 1,,"* = l00mA

2 a. Choose the correct answers for the following:i) A transistor has PNjunctions. A)one B)tuo C) three

ii) The value of'cr' is equal to A). 1 B) > I C) I

iii) ln the active region ofCE amplifier th6base emitterjunction is

V". : j o1/ ^ - V..= ,.4 Y

?, :5rr lSaKtL )9.1

3 a. Choose the correct answers for the following : . - i.. (04 Marks)

i) The most commonly used transistor configuration is circuit.A) CB B) CC C) CE ,.D)

BC

Fig.Q2(c)

ii) The best method oftransistor bras rs

A) selfbiasiii) Stabilization means making

parameters.A) knee point

b.

c-

B) operating point C) threshold point D) none oftheseiv) tfthe operating point changes it results in

A) thennal runway B) unfaithful amplification C) faithful amplification D) punch throughState the need for biasing and explain different t)?es ofbiasing with relevant diagrams and equations.(08 Mark)Determine Is, Vs. V6 and V6E for the circuit shown in Fig.Q3(c). and assume Vee = 0.7 V.

1of2

(08 Mark) .

4a.

d.

8a.

A) 360" B) e0"

B) increases

A) (324)8

ii) UJT has junctions. A) one B) two C) three D) fouriii) The anode ofthe SCR is always maintained at potential with respect to cathode.

Choose the correct answers for the following :

i) FET is controlled device. A) current

A) zero B) negative C) positiveiv) JFET is transistor.

A) bipolar B) unipolar C) tripolarExplain the basic principle ofoperation of SCR taking ofthe two transistor analogy.Explain UJT as rela\ation oscillator.Explain the drain and transfer characteristics ofn-channel JFET.

PART _ BChoose the correct answers for the lollowing :

.i) The input and output voltages ofsingle stage CE transistor amplifier are

06ELN15/25(04 MArk)

B) voltage C) bandwidth D) power

D) none ofthese

D) none ofthese(04 Mark)(0t Mark)(08 Marks)

(0{ Mark)

c) r 80"out ofphase.

D) 4s"

b.

c.

d.

b.c.

d.

ii) .The negative voltage leedback

-

the gain of an amplifier.A) decreases C) remains same as D) none

iii) ln phase shift oscillator, generally _ RC stages are used.

A) one B) two C) three D) four

C) both +ve and -ve D) none oftheseiv) Oscillator employs _ feedback.

A) negative B) positiveExplain two stage RC coupled amplifier with i1s iiequency response. (08 Marks)

Derive an equation for inpu! and output impedance ofvoltage series negative feedback amplifier. (06 }turks)

In RC phase sh ift oscillator R = 5 kQ and C : 0. I trtF. Calculate frequency of oscillation. (02 Marks)

Choose the correct answers lor the follor.ring ;

i) The CMRR of an ideal OP-AMP is A) finite B) infinite C) zero

ii) Slew rate of an OPAMP is given bydV

B) ______rr. dI.

iii) An ideal OP-AMP charactqistics do not change withA) pressure B) power C) liequency

iii) (283)ro:(?)8

c) 8l.lB) (64)10 C) (90)roB) (433)8 C) (4s6)s

D) temperature

(0:t Markr)(06 Markt)(06 Marks)

(0,, Mark)

D) 95.sD) (53)roD) (402)8

(02 Marks)

(06 \'lark!)

(04 Marks)

C) A D)A+BD)A

D) A+ D

D) NOR gate

(01 Mark!)D) none ofthese

dID) ------L

clV

(0,1 Mark)(06 Marks)

(06 Mflrks)

dIo, ;,dVc) ------gdr

b.

c.

d.

b.

c.

iv) The heart ofCRO is A) CRT B) electron gun C) deflecting plates D) screen

List the ideal characteristics ofan OP-AMP.Draw the circuit ofOPAMP as summff and derive an expression for output voltage.Explain the block diagram ofCRO.

Choose the corect answers for the following :

i) lfm = l, the sidebands carry % ofAM wave power.B) 46.6A) 33.3

ii) (1l0l0l), = ( ? ),0 A) (34),0

iv) 2's complement ofbinary number 101I is-. A) ll00 Bl 0l0l C)0110 Dll0l0Derive an expression for the instantaneous value ofan AM signal in terms ofcarrier and sjdeband frequencies.

(08 Mark)A l5 kHz audio signal is used to frequency modulate a 100 MHz carrier causing a carier deviation of75 kHz.Determine modulation index.i) Convert ( 1024.625)10 = ( ? )z ii) Convert (ABCD) 16 = ( ? ).:( ? )tiii) Subtract (l I l0l)2 tom ( I l0l0), using 2's complement method.

Choose the correct answers for the following :

i) Absorption property states that A + AB = B) B+AA) A+Bii) ldempotent property states that A.A A) A B) I

iii) AB+ABC+ABD:_. A)ABC B)A+B C)iv) The output is high, when all the inputs are high, such gate is called

A) NOT gate _ _B) AND gate

Prove that ABC + ABC + ABC = AB + AC .

C) NAND gate

Realize full adder circuit using logic gates and write its truth table.

Simplif the following expression and implement using NAND gates only.

A=(A+(BCXA+B+axA +B)

c)0AB

b.c.

d.

2 of 2

USN

10cIV18/28

Question Paper Version : C

First/Second Semester B.E Degree Examination, January 2013Environmental Studies

(coMMoN TO ALL BRANCHES)lMax. Marks: 50

INSTRUCTIONS TO THE CANDIDATESTime: 2 hrs.l

1.

)

J.

Answer all the fifty questions, each question carries ONE mark.

Use only Black ball point pen for writing / darkening the circles.

For each'question, after selecting your answer, Oarken .J]1-9.;aPpropriate circle

correspondirig to the same question number on the OMR sheet.

Darkening lwo circles lor the same Question makes the answer invalid.

Damaging/overwritinSr using whiteners on ',the OMR sheets are strictly

prohibited.

4.

5.

EIA is abbreviated form for . ,,

a) Energy impact assessment .. .. b) Ecological impact assessment

c) Environmental impact assessment . '- d) Emission impact assessment.

The central pollution control board was established under the provision ofa) Environment (protection) Act 1986b) Air (prevention and control) Act 1981

c) Water (prevention and control ofpollution) Act 1974d) None of these ,-. .

3. Which of the following statement is not true about animal husbandry?a) It is a part ofagricultural activityb) It is breeding, feeding and management of animalsc) It is live stock productiond) It is protective of wild life.

The distance upto which exclusive economic zone ofa country extends beyond its baseline is

1.

,

4.

5.

6.

a) 12 nautical milesc) 200 nautical miles

The fossil fuel whichthermal power isa) Coal

b) 24 nautical milesd) 100 nautical miles

Earth day is held on every yeara; June 5rr' b1 November 23'd

cause maximum environmental pollution due to its use in generation of

b) oir c) Natural gas d) None ofthese

c) April 22'd .,' .' d) January 26th

l.i".1'':"

-cl -

10.

lt.

12.

7. The word ecology is proposed by10crv18/28

c) Charles sourth wick d) Charles Altona) Ernt Hoekel b) Helena curtis

8. The liquid wastes from baths and kitchens are calleda) Sullage b) Domestic sewage c) Storm water d) Run off

The effect ofacid raina) Reduces soil fertilityc) Causing respiratory problems

\[4tich state is having women literacy in India?a) Karnataka b) Punjab c) Rajasthan d) Kerala

The Nuclear reactor (unit-3) in Japan that exploded on 12th March released

-a) Oxygen b) Hydrogen c) Methane d) Argon

Water borne dise$e can spread rapidly due toa) Proper sanitation - rb) Improper sanitation c) Improve sanitation d) None ofthese

13. Wet deposition is a measure ofa) Acid Rainc) PAN d)lS,usnended Oarticulate matter

Water logging is a phenomena o f .

a) Excessive irrigation ofcrop lands for griiwth ofcrops b) Decrease in soil strengthc) Soil roots become saturated due to overirrigation d) All ofthese

Environmental (protection) act was"enacted in the yeara) 1986 b) 1974 '- c) 1992 d) 1984

16. Dental caries in children may be caused due to water supplies dehcient ina) Calcium b) Flouride c) Iron . d) None ofthese

17. In Foodchain humans area) Primary consumersc) Primary and.secondary consumers

18. The couqfy which has the largest number ofchild labours in the world isa) India '

b) Increases atmospheric temperatured) Skin cancer

b) Autdmobile combustion source

b) Secondaryd) Producers

d) Pakistan

b) Ecological balanced) None ofthese

14.

15.

b) Bangladesh c) China

19. The perfect equilibrium existing in the biosphere between the various organisms is known as

a) Environment balancec) Ecological cycle

20. The solid wastes materials from offices. residence areas are calleda) Garbage b) Rubbish c) Waste

c) Spanish2I. The word environment is derived from.

d) None ofthese

d) Englisha) Greek b) French

-c2-

10crv18/2822. DDT (dichloro diphenyl Trichloro Ethane) was discovered by

a) Paul Mueller b) Ernt Hoeckel c) Charles Alton d) Chamokite

23. A Pesticide/insecticide which has repofied to cause physical deformities and disease in infantsin Karnataka and Kerala states recentlv isa) Endosulfan b) DDT c) Amitraz d) None of these

24. TheBhopal tragedy occurred at union carbide on December 2nd 1984 due to leakage ofa) Methyl isocyanate b) Iodine- i31 c)Cesium- 137 d) None ofthese

25. Environmental protection is the responsibility of_a) Govemment of India b) NGO's c) Individual d) None of these

26. Extensive planting oftrees to increase cover is calleda) Afforestation b) Agro-forestition c) Deforestation d) Social forestry

27. Most stable eco system is

a) Forest b) Desert c) Ocean d) Mountains

28. What is the pH range of drinking water?a) 6to 9 b) 6.5 to 8.5 c) 6 to 8.5 d) 6.5 to 7.5

29. A food web consists ofa) A pofiion ofa food chain b) An organism position in lbod chainc) Interlocking offood chain dlA set ofsimilar consumer

30. Which of the following is terrestrial eibsystem?a) Forest b) Grass land ...- c) Desert d) All of these

3l . World ozone day is celebrated ona) September 5th b) October 15th c):ssptember 16th d) September 1 1th

32. Definition olnoise is

a) Loud sound b) unwanted soundc) constant sound d) sound of high liequency

33. Which of the following is not a renewable source of energy?a) Fossil fuels b) Solar energy c) Tidal wave energy - d) Wind energy

34. Which of the following is not a green house gas?

a) Oxygen b) Carbon-di-oxide c) Chlorofluro carbon d) Methane

35. Objective of environmental studies is toa) Raise consciousness about environmental conditions.b) Create environmental ethics the faster awareness about the ecological inter dependence ofeconomic, social and political factors in a human community and the environment.c) Teach environmentally appropriate behaviour.d) All of these

36. A serious health hazard disease known as 'Blue Baby Syndrome' is caused when the titratelevel in the ground water exceeds

c) 250 mgll d) None of thesea) 25 mgll b) 2.5 me/l

-c3-

37. What is the maximum allowable concentration of fluorides in drinking water?a) l.0mgll b) 1.25 msll c) 1.50 mg// d)

Eutrophication is a _a) An improved quality of waterb) A process in carbon cyclec) The result accumulation ofplant nutrients in water bodiesd) Water purification techniques

10cIVl8/28

1.75 mgll

38.

39.

40.

47.

Typhoid, cholera are examples ofa) Vival infection b) Bacterial infection

World's environment day is held ona) June 51h

' u) Nore-b"tF

a) Non

a) Disease controlc) Employment generation

c) Protozoan infection d) None ofthese

c) April 22"d d) January 26th

b) Biodegradable organic matterd) None ofthese

. - -rl'--c) I )"' November

b) Population growth rate controld) None ofthese

b) Work, Job and Skillsd) All of these

organic matterc) Both a and b .-,

42. World's AIDS day is celebrated ona) 1't December b; 2"d'Qetober

43.

d) 1 lth December

EIA is related to " .

a) Resource conservation ' b) Effrcient equipmentc) Waste minimization , d) All of these

Water contaminated with cadmium oan i'duse.'' disease likea) Itai Itai b) Minamata c ) Ouch ouch d) Both a and c

fIN general assembly proclairnsil.the universal declaration ofhuman rights in Paris ona) 16th May 1994 .' b) 10th December 1948c) 15th November 1980. d) 1 1th December 1949

c) 0.4 billion cubic kilometer

which causes maximum environmentai pollution

c) Industrialisation d) Mining

b) 2.6 billion cubic kilometerd) None o f these

:The major objectives of family welfare programmes in India is

44.

45-

Electromagnetic radiation energy is an energy in the form ofa) Light b) Wave c) HeatEconomic security is measured on the basis ofa) Incomec) Labour market and employment

-c4-

The human activitiiainong the following,having regional.2md llobal impact is

-

^\ ^ ---:^--r.---l- . - L\ rr-L^-:^^.:^-a) Agricultwe.: - b) Urbanisation

50.d) All of these