1st and 2and Semester Physics Streem (2013-December) Question Papers

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USN lOMATl1

First Semester B.E. Degree Examination, Dec.2013lJan.2Ul4Engineering Mathematics - I

Time: 3 hrs. Max. Marks:100Note: l. Answer any FIW full questions, choosing at leust twofrom each part.

2. Answer all objective type questions only in OMR sheet page 5 of the answer booklel3. Answer to objective tlpe questions on sheets other than OMR will not be valued.

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PART _ A1 u.,,.

,Choose the

3o;;ect.answels for the following :

:\ If. I t,

x+l(-l)n (n + 1)!

(x + l)n*1

ii) If y: (ax +b)- with m: n, then y, isA) n! an B)0

A) B) (-l)nnl(-.rt*i

C) (-1)'n!(x + l)n

C) n! bn

D) 1-1)n-rn!(". fli

D)n!iii) The geometriCal interpretation of Lagrange's mean value theorem is

f(b)-f(a) B) f,r.t_f(b)+f(a)C; l''lc)_ f(b)-f(a) D)noneof theseA)f'(c)=- b-a b-a g,(c) g(b)-g(a)

iv) The Maclaurin's series expansion of e-' is

,,:3! 2! 3!

C) *- x- * x3 D) * *4*d* (04 Marks)2t3!.213!

b. Ify:sinlog (x2 +2x+ l),provethat(x+ l)'yr,+ r+(2n+ 1)(x+ 1)yn+1n2+4)yn:0.

c. If x ispositive, showthatx> log (1 +x) r"-L*.d. Using Maclourin's series, expand log (1 + e*) upto the terms containing x

2 a. Choose the correct answers for the following :

. lim /, .--..\i) " -+l

|;J3!I lis equalto-( f;-x )

A) 2 B)-2 C) 1

ii) If $ be the angle between the tangent and radius vector at anyr = (e), then sin $ is equal to

(04 Marks)

(06 Marks)(06 Marks)

D)-1point on the curve

D) dsl

(04 Marks)

the curve meets the

(06 Marks)

(06 Marks)

A) drlds gt.do'ds C) ,do'dr

ct ? *,,'Y'11

t + z\ -rt2cosm0.

iii) The rate at which the curve is bending calledA) radius of curvature B) curvature C) circle of curvature D)

iv) The radius of curvature for polar curve r : (e) is given by

A) l'-tY s1 ''*,lY'' ,2*rl-rr2 'rl*x'-rr,b. Find the Pedal equation of the curve ,t : a'c. Find the radius of curvature for the curve v2=d9:*), where

xx - axis.

Evaluate lim (ax + t )x.*--*(.ax-l)d.


i) If u: log (x2 + f + r'1,then I ,,0z

2x

x'+y'+z'2vts\ .,-+ )x'+v'+7,- *2 +y2 +12

1OMAT11

*2 +y2 -12

D) .none

of these(04 Marks)

are made

(04 Marks)

(06 Marks)

(06 Marks)

D) none of these

D)3

D) none of these(04 Marks)

(04 Marks)

- y)k is irrotational.

(06 Marks)

(06 Marks)

2z2zD)c)

ii) If u:(x, y) and y is a function x, then

. du au dudyA\^'d* Cd,n\du fu aury,l\ l\-r

-'dx ax q dx

^2. a2f a2fiii) If r={*.s=- &t=3dx' oxo\ dy':,,,

A) rr-s2?O g)rt-s2:o

-au du audvax dx dy dx

^.au du dufoI \\ut

-ax dx ar ax,' i','"''

, then the condition for the shddle point is

C) r1r* s'> O D)rt-s2+0/\

iv) Ifu:x*yr z,y=,!+z,z:z,then J[ ''u'l ]ir.qrulto\x'Y'zl

A)1 B) -1

d. If x: u(1 - v), y: uY, Ftove that JJ' :1.

a mirror is given by the formula I - I = Z . If .qual errors. 'e'u (t r)

in the determination of u and v. Show that the rosulting error in f is el - + - I .

^ +"^*1tu;^ ,ur-)'v)If u: f(2x-3y.3y -42.42-2x).prove that 1;.i n*i;=0.

c)0

b.

c.


i) Direotional derivative is maximum alongA) tangent to the surfaceC) any unit vector

,ii) Ifr: lx;+y1 + 2rl, then Vrn is

' iii) If f : 3x2 - lf + 4z2,thencurl (grad f) is

B) normal to the SuiftceD) coordinate axes

C) V.Vr'

A) 4x - 6y + 8z B) 4x1-6y; + 8z k C) b'iv) If the base vectors er and azzta orthogonal then I e1 x e2 | is

b.

c.

A)0 B)-1 c)+1

-+If F =(x+y+l)i+ j-(x+y)k, showthat F.crulF =0.

Find constants,a, and,b, such that i = (axy + r31i+ (3x2 - z)j+ (brr2

Also find a scalar function $such that i - V0.Prove that a spherical coordinate system is orthogonal.

1^{Ad.

PART _ B


1l

il Jsin

7 x dx is equal to0

A) zero Bt 32n'35

?)C):35

C) x - axis

)c){'2)/7 .: a-," rS

Cy,za

1OMAT11

(06 Marks)

(04 Marks)

(04 Marks)


ii) The asymptote of (2 - x)l : *3 isA) x:2 B) y - axis

iii) The ar€a of the cordioid r : a(1 - cos0) is.2JfiAA)_

2

1(trD) =:"'"a^

-)z

D) none of these

n

D) JA'2

D) a. (04 Marks)

b' Evaluate Iar,t + acosx)dx uy:airrrr.*iating0'

B)I2

iv) The entire length f the asteroid x2l3 + f '3

A) 6a B) 3a

ir) The equationy - 2x: c represents the orthogonal trajectories of the familyA) y: ae-" B) x2 + 2f : u c) xy:.a D) x + 2y: a

under the integral si

2a

c. Evaluate I"'.lZu- *2dr. using reduction formula.

d. Find the volume of generated by the revolution of the curveline.

6 a. Choose the corrbct'u.rr*.r, for the following : .

D The general solution of the differential equation dyldx : (y/x,) + tan (y/x) is

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

,,D) cos (y/x) : c

ii) ''.'the family of straight lines passing through the origin is represented by the differentialequation:A) ydx+xdy:0 B)xdy-ydx:0 C) xdx+ydy:0 D)ydy-xdx:0

iii) The homogeneous differential equation Mdx + Ndy : 0 can be reduced to a

differential equation, in which the variables are separated by the substitutionA) v: vx B)x*y:v c) xy: v D)x-y:v

b.

c.

d.

Solve 1, + fl9- y = e3*1x + l)2.dx

Solve (1 + xy) ydx+ (1 -xy) xdy:0.Find the orthogonal trajectory of the cordioids r: a(l - cos 0).

3 of 4

1OMATl1


i) If every minor of order 'r' of a matrix A i, ,..o, then rank of A isA) greater than r B) equal r C) less than or

"q*l,o . D) lessthan r.

-:

-r----- -" / rvo'

ii) The trivial solution for the given system of equations x + ly * 3z:0, 3x + 4y+ 42* 0,7x+ 10 y + l2z:0 is J

A) (1, 1, t) B) (1,0,0) c) (0, 1,0) D) (0,0,0)iii) Matrix has a value. This statement / \"> -' "''

. . , 11) is always true B) depends upon the matrices C) is false D; none of theseiv){.ai1singularandp(A):p(A:B)thenthesystemhas

A) unique solution B) infinitely many solution c) trivial sorution D) no solution.

b.

d.

8a.

c.

Using elementary transformations, find the rank of the matrix '; ' ,.',' :,'

ttl:41 21.I ^ _l

(04Marks)l-2 3 2 s_l

Showthat the system* i y'* z:4;2x+ y - z: l; x- y *22:2 is consistent, solve the(06 Marks)Apply Gauss - Jordan method to sorve the system of equation :

2x+ 5y t 7z : 52 ; 2x-r y - z: 0; i + S, + ;': ;.- -

(06 Marks)

Choose the correct answers lor the following :

i) A square matrix A is called orthosonai ifA)A:AL B)A':A-I I ,,,gy AA-r:I

ii) The eigen vatues ofrhe ,nu,ri* | | fl ^r,142 2)A)lrJ6' B)ltJ5 c)Js D)l

ii0 T11e^iTex;d

signature of the quadratic form xf +2xf-3xj are respecrivelyA) 2,.t " B) 1,2 C) 1, 1 -: . njrron. of theseiv) Two square matrices A and B are similar. if ::. .:.' A) A: B B) B : p-rAI, C) Ar : Br D) A-r : B-r.

Reduce the quadratic form gx2 + 7y2 * 322 - 12yz + 4zx_gxy to tt . .urronfuii Orljo Marks)

Determine the characteristic roots and eigen vectors of

I s -6 21

A=l -6 7 -41 .

l, -4 3j

b.

c.

D) none of these

(04 Marks)

(06 Marks)

d' Reduce the quadratic form xl + 2xl - 7"1 - 4xp2+ 8x2x3 into sum of squares. (06 Marks)

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First/Second Semester B.E. Degree Examination, Dec.2013 lJan.20l4

Engineering Physics

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Note: 1. Answer any FIW full questions, choosing at least twofrom each part.2. Answer all objective type questions only in OMR sheet page 5 of the ansipei booklet.3. Answer to objective fi;pe questions on sheets other than OMR will not:he.valued.4. Physic.u,l constants : h : 6.62 x 1tr34 JS, c : 3 x 108 m/s, m" : 9r,1"''*'1A31 kg.

:::,,,.,_.._,.-. I ;,

PART _ AI a. Choose the correct answers for the following : (04 Marks)

i) Photo electric effect signifiesA) particularc,aat:re of radiationB) wave natureofradiation

,,,,,,,,,,,

C) both particulate and wave nature of radiationD) none of these 1",,,

ii) In a blackbody radiation spectrum, Wien's displacement law is true forA) high frequency region B) low &equency region

C) for all range of,,freQuencies D) none oftheseb. Explain with a neat,,diagram, how the Davison-Germer experiment proves the concept of

matter waves. (07 Marks)c. Obtain an expression for group velocity. (05 Marks)d. Calculate tho:de-Broglie wavelength associated with rain drops.:fi+ting under gravity with a

speed otoi;$,b "/s.

Given, the average diameter of the drops is t rnm a""a density of water is1000 kg/t'n' (04 Marks)


. i) The uncertainty in location of a particle is equal' uncertainty in velocity if AxAp : h is

A)V u); c) 2v

ii) Uncertainty principle applies only between /6Y l\-q\,A) position and momentum B) energy and time ,'.'fl .enstou\ \f;ijC) any two canonically conjugate variables D) either A or B. \.{ t.rsnefrv / I /iii) If width of the potential well increases by 4 times, energy of the particle\r\ /"VilIt width of the potential well increases by 4 times, energy of the particle\r#.\ ,/^pt',A) reduces to 114 times B) reduces to 1116 times \o"V'C'7C) increases by 4 times D) increases by 16 times 'Y942

ir) Probability of finding the particle isA) highest in ground state B) lowest in first excited stateC) independent of energy of the state D) increases with energy of the state

C) all range of fiequencies ;,.",,,.- ,' D) not applicable for blackbody radiationiii) If the velocity of a particle douli&s, then de-Broglie wavelength

A) increases by 2 times . "ii, 1 B) decreasesby 2times

C) no change D) none of theseiv) Compton effect takes place

A) only lor high frequency radiation B) only for low frequency radiation

to de-Broglie wavelefrgth. The

::::

06PHYt2t22

2 b. Obtain an expression for energy eigen value of a particle in a potential well of infiniteheight. (07 Marks)

c. Explain the most probable state of the particle by drawing probability curves. (05 Marks)d. The position and momentum of 2 kev electrons are simultaneously determined and if its

position is located within 0.12 nn, what is the percentage of uncertainty in its momentum=(04 Marks)

rr'3|' r' 3. Choose the correct answers for the following :

i) At very high temperatures, the mean collision time

A) 12 u,+ ., +

or an electron t, " gl|IiT.?

ii) If Fermi energy of a metal is 3 eV, its Fermi temperature is

A) 3'"5 r 104 K B) 1.6 x 102 K c) 3.5 , 103 K, '', " D) 10-12 Kiii) Current,of 3A is flowing through a cylindrical copper wire ofradius 3 mm. the current

density is nearlyA) 105 Nrl .:.,, B) 1or A/m2 c) 106 A/#

iv) Drift velocity of electrons in a metal depends on

D) independent of T

D) 10-6 A/m2

expression for(10 Marks)(06 Marks)

(04 Marks)

A) mass of eterman B) applied electric fieldC) mean collision time D) all of these

b. Define mean tree path. mean collision time and relaxation time. Derive anconductivity in metals.

c. Explain the merits of quantum free eleOtron theory.

4 a. Choose the correct answers for tfre,fof6wing 'i) The dipolemendent between the pair of opposite charges each of magnitude 1 pC

separated by a distance of l0 prm is

A) 10 x 10-12 cm B) 10-12 cm C) 10 x 1012 cm D) 10-12 cmiD The distance between plates of a parallel plate capacitor is doubled. The capacitance

A) doubledC) increases,by 4 times

iii) Relation,between magnetic flux(with uiual notations) is given by

iv)A)p:BH B) B: pH

" ;Barium titanate is an example ofA) ferromagnetic materialC) ferroelectric material

A) beam is less powerfulC) beam has large wavelength

B) halvedD) decreases by 4 times

density, permeability and magnetic field intensity

C) H: Bpr ' '

il; No relation exist"

,,,,,...

B) superconducting mateiialD) none of these

(06 Marks)(05 Marks)(05 Marks)

(04 Marks)

B) beam is highly powerfulD) none of these

b. Explain various electrical polarization mechanisms in dielectrics."c. What are ferroelectrics? Explain ferloelectric hysterisis.d. Briefly explain the paramagnetism phenomenon using Langevin's theory.

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

i) Pumping process in diode LASER is byA) optical means B) forward biasC) electrical discharge D) thermal means

i, Semiconductor LASER is not preferred in LASER drilling since

5 a. iii) Holograms can give a clear 3D image if they are observed underA) white lightB) green lightC) blue lightD) same wavelength of light used for recording the hologram.

ir) LASER beam is highly powerful due toA) high intensityC) constructive interference

A) high absorption lossC) not easily available

B) less broadeningD) all of these

C) insulator

,: B) low magnetic field,:. D) high resistance

B) high scattering lossD) none of these

06P}IYl2l22

(04 Marks)

(04 Marks)

D) super conductor

(04 Marks)

(04 Marks)

D) 68%

c.

d.

With the necessary diagram, explain the construction and working of He-Ne LAS% Marks)

Wlf LASER is preferred for environmental pollution monitoring? Explain the principle andrelative merits of LIDAR system (05 Marks)Find the ratio between Einstein coefficients for stimulated and spontaneous transmissions in

a LASER system emitting light of wavelength 5000 A. ., ,:"'.,,.

6 a. Choose the correct answers for the followingi) If the critical temperature lor specimen is above 0 K. it must be

A) semiconductor B) conductorii) SQUID is used ro measure

A) high magnetic fieldC) high potential dilference

iii) Propagation of light ray in graded index fiber is byB) diffiaction

C) reflective confinement D) none of theseiv) Shorter wavelength radiations are not preferred in optical fibers due to

b. Explain type I and type II super conductors with necessary graph and example. (06 Marks)c. Obtain an expression for angle of acceptance and numerical aperture of an optical fiber.

Also explain the condition for light propagation in a optical fiber. (06 Marks)d. An optical fiber has core index of 1.6 and cladding index of 1.4 with core diameter of

40 pm. Calculate 'V' number ratio when the fiber is in air and;ih water of refractive index1.33. Given wavelength of light is 500 nm.

.. .'

a. Choose the correct answers for the following :

i) The atomic packing factor of NaCl crystalA) s2% B) r00%

ii) Four types of Bravasis lattices are observed inA) Rhombohedral structureC) Triclinic system

c) 74%

B) Monoclinic systemD) Orlhorhombic system

iii) Acrystalhas unit cellproperties a* b * c and cr: p:90o + B, isA) orthorhombic B) monoclinic C) tetragonal

iv) The Miller index of the plane parallel to Y-axis isA)(101) B)(01 1)

at a glancing angle of 30o, calculate the lattice constant.

: ;]:

D) triclinic ..,1;;

D)(co 1 1)C)(1co1)b. Obtain an expression for interplanar spacing in a crystal in terms of lattice parameters.

(06 Marks)c. What is coordination number? Explain this with reference to SC, BCC and fcc structures.

(06 Marks)d' X-ray of wavelength 5 A interacts with a crystal. If the second order reflection was observed

eg$TFi.e.L, ggi:1,t",;l'ri"

(04 Marks)

USN 10crv13/23

First/Second Semester B.E. Degree Examination, Dec.2013 /Jan.2Dl4Elements of Givil Engineering and Engineering MechanicsTime: 3 hrs. Max. Marks:100

Note: l. Answer any FIW full questions, choosing at least two from each part.' ,, 2. Answer all objective lype questions only in OMR sheet page 5 of the onswer booklel, 3. Answer to objective ltpe questions on sheets other than OMR will not be valaed.

b.

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PART _ AI a. Choose the correct answers for the following :

c. What are infrastructure related projects?

2 a. Choose the correct answers for the fullowing :

i) The component of a force perpendicular to its line of action isA) maximum B) minimum C) zero

(04 Marks)i) A bridge constructed at some angle to river flow is

A) -kpw bridge B) square bridge C) steel bridge D) lift bridgeii) The stttlature that separates roads into separate lanes is called

A) Kerb B) median C) road margin D) camberiii) The upstream side of a dam

A) arch dams B) gravity dam C) earth dam D) reservoir

A) water B) soil Cl air D) none of theseb. With the help of neat sketches, briefly explain the cross-section of road and gravity dam.


(04 Marks)

D) none of theseii) The moment of a force about a moment centre lying on its line of action is

A) maximum B) minimum C) zero D)Two equal and opposite forces separated by a distance will produce Z.CFry,:IA) translation B) rotation lF/ "-Y:\C) both translation and rotation D) none of these l*i

"*-*3'::': i:'; \Moment,+f a force will produce '

,.i*\ *rre{.ut*"

l;lA) translation B) rotation trb\ ,/"rilC) bottr translation and rotation D) none of these \if,]ffi7L,). porn translatlon ancl rotatron D) none of these \ 6ff*,")A bloc'k'weighing w : 10 kN is resting on an inclined plane as shown in'>8ry,6.

Determine its components normal to and parallel to the inclined plane. The plane makes anangle of 20o with the horizontal. . (04 Marks)

. A body is subjected to the tkee forces as shown in Fig.Q2(c). If possible determine thedirection of the force "F" so that the resultant is in 'x' direction, when (i) F : 5000 N,

c,

3a.

( ii) F : 3000 N.

Choose the correct answers for the following :

i) In case ofcoplanar concurrent force the resultant force passes through

(12 Marks)

(04 Marks)

A) point of concurrenceC) different plane

B) away from point of concurrenceD) none of these

ii) If two concurrent forces each of 'P' act at right angles to each other, their resultant is

A) 2P B)P Q JiP D 2JPiii) If IV : 0 and IU: 0 for a coplanar nonconcurrent force system, then it is in

A) equilibrium B) translation C) rotation D) none of theseir) Conditions of equilibrium for a coplanar concurrent force system is

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

10crv13/23

b. Two forces acting on a body are 500 N and 1000 N as shown in Fig.Q3(b). Determine thethird force "F" such that the resultant of all the three forces is 1000 N directed at 45o to 'x'axls. (06 Marks)

c. Determine the resultant of the four forces acting on a body as shown in Fig.Q3(c) withrespect to point "O".


(10 Marks)

(04 Marks)

i) The centroid of a triangle of height 'h' is located at a distance from its apex.

A) W2 B) 2W3 c) h/3 D)hii) Intersection of _ number of symmetrical axes will give centroid of plane area.

A)3 B)4 c)2 D) none of these

iiil Moment of an area about a reference axis passing through its centroid isA) maximum B) minimum C) zero D) none of these

iv) Centroid of a semicircle from an axis passing through the diameter is

D)113r

(06 Marks)the Fig.Qa(c) with respect to OX and

(10 Marks)Determine the centroid of the shaded area shown in

PART - qChoose the correct answers for the following : '

A) JL'3n B) a4n

C)I4r

b. Determine the centroid of a semi-circular lamina of radius "r" by the method of integration.

c.

5a. (04 Marks)

i) If three forces are acting at'a point and are in equilibrium, out of which two are actingin the same line, then the third foree isA) maximum B) minimum C) zero D) none of these

ii) A rigid body is in equilibrium if the resultant force of concurrent tbrce system isA) positive B) negative C) zero D) none ofthese

iii) Lami's theorem is valid for number o.f concurrent forces in equilibrium.D) none of these

A) equilibriant B) similar force C) opponent force D) none of theseState and prove Lami's theorem. (06 Marks)b.

c.

A) two B) three C) fouriv) The force equal and opposite to resultant is called as

The frictionlesS pulley 'A' shown in Fig.Q5(c) is supplied by two bars AB and AC whichare hinged &t 'B' and 'C' to a vertical wall. The flexible cable DG hinged at 'D', goes overthe pulley afid supports a load of 20 kN at 'G'. The angles between the various members are

shown in the figure. Determine the forces in the bars AB and AC. Neglect the size andweight of the pulley.


(10 Marks)

(04 Marks)

D) none ofthese

D)4

c) 3 D)4

B) Uniform dead loadD) Uniform diameter loadat 'A' and is free at 'B'. Determine the

(06 Marks)

i) A hinged support can have reactions.A)2 B)4 c)l

ii) A determinate beam can have number of unknowns.A)2 B)3 c)1

iii) A fixed support can have _ reactions.A)1

iv) udl stands forA) Uniformly distributed loadC) Uniform door load

The cantilever beam shown in Fig.Q6(b) is fixedreaction when it is loaded as shown.

B)2

b.

c. Find the forces in all the members of the truss loaded s shown in the Fig.6(c). Tabulate theresults. (10 Marks)

a. Choose the correct answers for the following :

i) Compared to static liiction, kinetic friction isA) greater B) smaller C) very large

ii) Friction force is to the contact surface between bodies.A) parallel B) perpendicular C) tangential

iii) Friction force is a force.A) active B) passive C) normal

iv) The tangent of the angle of friction isB) coefficient of frictionD) limiting friction

10cIv13/23

(04 Marks)

D) zero

D) none of these

D) none of these

(10 Marks)

(04 Marks)

D) m'

D) -o

A) angle of reposeC) cone of friction

surfaces is 0,20.

8 a. Choose the corredt axswers for the following :

i) Unit of second moment of area isB) *'

b. Defite: i) Angle of friction; ii) Coefhcient of friction; iii) Cone of friction. (06Marks)c. What is the value of 'P' in the system shown in Fig.Q7(c), to cause the rnetion to impend to

the right? Assume the pulley is smooth and coefhcient of friction between the other contact

ii) Unit of radius of gliration is _.A)m B)-'

t4

B) !-8

A)m

iii) Moment of inertia of a square of side 'b' about an axis through its centroid is

boA)-12

iv) P6ns lrlolrent of inertia isA) Ir* + Iyl B) I,* + 1,,

centroidal X-X and Y-Y axis.

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c) mo

c) ,r,'

c) 436

C) I, + I,,

D) q12

D) none of theseb. Define: i) Moment of inertia; ii) Radius of gyration; iii) Polar moment of inertia. (06 Marks)c. Determine the moment of inertia of the symmetrical I-section shown in Fig.Q8(c) about its

(10 Marks)

Fie.Q2(b)

Fig.Q2(c)

lfio$l

Fig.Q3(c)Fie.Q3(b)

2 a€A

10crv13/23

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4of4

USN r0ENIE14l24

First/Second Semester B.E. Degree Examination, Dec.2013 I Jan.20l4

Elements of Mechanical Engineering

Time: 3 hrs. Max. Marks:lO0

Note: l. Answer any FIW full questions, choosing at least twofrom each part.2. Answer all objective gtpe questions only in OMR sheet page 5 of the answer booklet.3. Answer to objective gtpe questions on sheets other than OMR will not be valued.4. Use of steam table is permitted. '.,

PART _ A

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I a. Choose the.correct answers for the following :

i) Coal is.an,example for _ energy sources.A) renewable B) non-renewable C) celestial energy

ii) Photosynthesis process is also known as

A) Helio therrnal processC) Helio electrical process

C) single tube boiler

A) reaction turbineC) open or closed gas turbine

B) Helio chemical process

.D) Pizeo electric process

B) vertical boilerD) externally fired boiler

(04 Marks)

D) bio-mass

(02 Marks)

(06 Marks)

,,, (04 Marks)

D) pgtentialof moving blades

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

iii) Partially dry steam and:partially wet particles in steam called as

A) dry steam 'i ' B) super heated steam

Babcock and Wilcox boiler is an example for _.A) fire tube boiler

Name any four boiler mountings and state their-:functions.

iii) Dry steamat 1O0 kPa abs -iv) Steam at.l2bar and95o/o dry. , ,.1,1

2 a. Choose the correct answers for the following : , . ,

i) , .,'Steam turbine converts in to mechanical energy.A) kinetic energy B) weight C) velocity

' ii) Compounding consists of one set of nozzle and two or more setcalled as

A) velocity compoundingC) pressure velocity compounding

iii) Pelton wheel is example forA) reaction water turbineC) impulse water turbine

iv) Combustioned gas is directly converted into the mechanical power called as

b.

c.

d.

b.c.

d.

With the help of neat sketch, explain the working of a Francis turbine. (08 Marks)Determine the total heat content per unit mass at the following state using the steam tables.Assume ambient pressure to be 100 kPa and Cp: 2.0934 kJ/kg.i) 10 bar absolute and 300"Cii) 100 kPa gauge and 100 kPa abs and 250oC

B) pressure compoundingD) velocity pressure compounding

B) low head water turbineD) steam turbine

B) impulse turbineD) steam turbine

Explain the principle and working of reaction turbine.With the help of a neat sketch, explain the working of a Francis turbine.Explain the working principle of a gas turbine on closed cycle.

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3 a. choose the correct answers for the following ' (04 Marks)

i) Otto cycle engine is an example for

A) petrol engine gl Ji;el engine c) dual engine D) all of these

ii) 4 stroke engine has power stroke in

-

orrornorirre cv :

A)everycycleB)everyalternativecycleic) every third cycre D) in ali the revolution of the crank shaft' '

iiD rn t*o-Jt-t. p.trot engine compressive ratio.is approximately

A) r:22 e; t'tt ^ C) l:i o) 1:80

'

iv) piesel cycle engine is also called as D\ ^^-olonr nraea.rc

a) corrsiarrt vohime cycle B) constant pressure cycle

":' C) dual cYcle D) all of these '

b. E*piaiiJrJittr u,r.ut figure 4 stroke petrol engine. ,,, ' I (08 Marks)

c. Differentiatl u.t*..;4 stroke and ) stroke engine. i (04 Marks)

d. cir. uoru*:ii;;';;,;";,-k. "ttgi". over four stroke engine' , (04 Marks)

---^ c^-+L^ 4.^ll^.r,ino ' :':: (04 Marks)a. Choose the corr€e1'answers for the following :

,':i) Good refrigerant should be

A) high boiling Point B) flammable

ci row thermai.;nAn ti'itv DJ non-toxic

iD Unit of refrigeration ii''

C) Ampere of rJfrigeration' ' '' '"1 D) None of these

iii) Ammonia refiigerant is used in;,*,* ieti8elltol'

C) vapourcompression . r ^., , D)airconditioner

ir) Function of theihrottle valvetn a refrigetator is to

A) reduce the PressurQ' ,

B) increase the PressureC) converts vapgur'iefrigerant into liquid i',

D) liquid refrigerant into vapour converslon

b. Describe with a neal,Sketch, the working of vapour.absorption'refrigerator' (08 Marks)

;: "ffih;;;k;ril;i;.""r" "ir_."ndit[ner,

exptain its worlringprinciple. (08 Marks)

PART _ B

5 a. Choqse the correct answers for the following :

i) ' ,"

Function of the lathe is

" A) Produce cYlindrical Parts

, C) Produce slots

ii) SPeed lathe is examPle for

A) geared head lathe B) simple lathe

" :: (04 Marks)

B) produce keY holes ""!

D) all of these

C) universal lathe D) caption lathe

b.

c.

ii, Reaming oPeration is a ,-\ i ,lA) drill operation B) lathe operatton

C) milling operation D) grinding operation

iv) Radial drilling machine is used for' / A) small *ork, B) medium works

i) medium and heavy works ) all of these

With a neat sketch, L*pi"i"."nstruction and operation of radial drilling machine'

Explain with figure iai., trtttittg with compound slide swiveling method'


2 of3

6a.

7a.

8a.

b.

c.

d.

With the help of a neat sketch, explain the working of a universal milling machine.(08 Marks)


i) Milling machine removes the metal usingA) multi point cutting toolC) abrasive wheel

ii) Work piece and cutting tool moves in the same direction called as

A) up milling B) down millingC) combination of up and down milling D) all of these

iii) Emery is an example for _ abrasive.A) natural B) synthetic C) artificial

iu) Center less grinding is used forA) long work pieceC) both long and short work piece

t0EN,.Et4l24

(04 Marks)

B) single point cutting toolD) drill bit

D) clay

B) short work piece '

D) internalgrinding


(04 Marks)


(04 Marks)

B) increase spee4,, ,,,

D) decrease in speod,,.:

B) creepD) all of these

(06 Marks)

Explain with figure working principle of center less grinding machine.Explain any': milling operation.

.t,.


D Fusion welding is an example forA) resistance welding ,B) arc weldingC) forge welding D) Thermit pressure welding

ii) Copper base filler metal is used forA) soft soldering B) hard soldering C) brazing D) welding

iii) Grease is an example lor _ lubrication.A) solid B) liquid:,, C) semi liquid D) all of these

b.

c.

d.

iv) Collar bearing is also kno'ryn asA) journal bearing B) tlrust bearing C) foot step bearing D) radial bearing

Explain the principle of arc welding with a figuie. (06 Marks)Name the three types of oxy-aCetylene flame. Expiain the application of each of them.

Describe the drop feed oil lubrication with neat sketches.,,,Choose the correct answers for the following :

D Jockey pulley is used forA) inorease arc of contactC)'deCrease arc of contact

ii).-V/henabe1tmoVeSforwardwithoutcarryingpul1eyscalled,.. A) slip

C) both slip and creepiii) Chain drive is used in

A) center distance less than 8mC) positive power transmission

iv) Spur gear is example forA) parallel axis B) non-parallel axis C) co-axial D) non-intersecting

b. With a neat sketch, explain past and loose pulley.c. Explain following gears:

i) Spur gear ii) Helical gear iii) Bevel gear iv) Rack and pinion (06 Marks)d. In a compound train of wheels, the wheels A, B, C and D have 15, 30, 20 and 40 teeth

respectively. The wheels B and C are keyed to the same spindle. If the wheel A runs at400 rpm, find the speed of the wheel D. Sketch the arrangements.

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B) high power rrunr-irrioNfug 67'D) all ofthese -----

(04 Marks)

USN l0ELE15i25

First/Second Semester B.E. Degree Examination, Dec.2013 lJan.2014

Basic Electrical Engineering

Time: 3 hrs. Max. Marks:100

Note: l. Answer uny FIW full questions, choosing at least twofrom euch purt.2. Answer ali objectiie typi questions only ti Omn sheet page 5 of tie ilnswer booklet.3. Answer to objective Stpe questions on sheets other than OMR will not be valuecl.

d.

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PART _ AI a. Choose the correct answers for the following :

D The polarity of voltage drop across a resistor is determined by(04 Marks)

(06 Marks)

(04 Marks)

ii) Three resistors of 4 f), 6 f) and 9 Q are connected in parallel in a network. Maximumpower will be consumed by_.A) 4 f, resistor B) 6 O resistor C) 9 O resistor D) all resistors

iii) The magnitude of statically induced e.m.f, depends on

A) the value of resistorC) direction of current in resistor

A) the coil resistanceC) the rate of change of flux

A) Work lawC) Fleming's right hand rule

B) the value of currentD) the polarity of source

B) the flux magnitudeD) all of these

B) Ampere's lawD) Fleming's left hand rule

iv) The direction of induced e.m.f,in a conductor (or coil) can be determined by _.

b. Derive equation for energy stored in magnetic field. (04 Marks)c. Find the value of resistance 'R' as shown in Fig.Ql(c), so that current drawn from the source

is 250 mA. All the resistor values are in ohm. (06 Marks)

-fsv_

hoFig.Qi(c)

Coils A and B in a magnetic circuit have 600 and 500 turns respectively. Acoil A produces a flux of 0.04 Wb. If coeflicient of coupling is 0.2, calculate:i) Self inductance of coil A, with B open circuited.ii) Flux linkage with coil B.iii) The average emf induced in coil B when the flux with it changes from zero to full value

in 0.02 second.iv) Mutual inductance.


D A coil is rotating in the uniform magnetic field of an 8 pole generator. In onerevolution of the coil, the number of cycles generated by the voltage isA) one B) two C) four D) eight

D)%ii) The average value of sin 0 over complete cycle is

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A) +l B) -1

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C) zero

t-;:ff;";"";il2 a. iii) difference

10ELE15/25

across the variousIn the circuit shown in Fig.Q2(a)(iii), the potentialelements are shown. What is the source voltage, V?

A) sOvFig.Q2(aXiii)

B) 100 v C) zero D) 150 V

D) 10[ -40"

iv) If two phasors A: 60FU, B : (6 + j0), then A/B

A) 360EE B) 6080" c) 10E0"

b. Derive r.m.s. value of sinusoidal voltage in terms its maximum value. (04 Marks)

c. An inductor coil is connected to supply of 250 V at 50 Hz and takes a eurrent of 5.{. The coildissipates 750 W. Calculate power factor, resistance and inductance of the coil. (06 Marks)

d. A capacitor of 50 ;-rF shunted across a non inductive resistance of 100 f) is connected inseries with a resislor of 50 f) to a 200 V, 50 Hz supply. Find circuit current and power

(06 Marks)

(04 Marks)3 a. Choose the correct answers fbr the following :

i) The advantage of star-connected supply system is thatA) line-current is equal to phase current

B) line voltage is equal to "6 phase voltageC) two voltage can be usedD) it is simple arrangement

ii) The phase sequence R Y B denotes thatA) the e.m.f of R leads Y by 120"C) the e.m.f of Y leads B by 120"

iii) In a three-phase power measurement by two Wattmeter method, both Wattmetersreads the same value. The power flactor of the load must be

of voltages in a three phase star connected system.State advantages of three-phase system over a single-phase system.

B) the e.m.f of Y lags R by 120"D) all of these

B) D.C. onlyD) none of these

B) Wooden-Batten wiringD) Conduit wiring

A) unity B) 0.707lag C) 0.707lead D) zeroiv) Three phase apparent power is equal to

A) .Ev.tr B) ..EVr-Ir cos O C) ..6v.t. rio6 D) VLILb. With the aid of a phasor diagram obtain the relationship between the line and phase values

c.d.


(06 Marks)

(04 Marks)

Three identical coils, each having a resistance of 10 f) and a reactance of 10 f) areoonnected in delta, across 400 V, 3-phase supply. Find the line current and the readings onthe two Wattmeters connected to measure the power.


i) Dynamometer type instrument-s can be used forA) A.C. onlyC) both A.C and D.C

A) Cleat wiringC) Wooden-casing wiring

ii) The most commonly used induction type instrument isA) Voltmeter B) Ammeter C) Watt-hour meter D) Wattmeter

iii) Most modern wiring system for domestic and commercial installation is

iv) The fuse wire for smaller current rating (up to 10 A) are made ofA) Lead-tin alloy B) Copper

2of4C) Lead D) Aluminium

1OELE15/25

4 b. Explain with a neat sketch, single phase induction type energy meter. (06 Marks)c. Explain staircase wiring. (04 Marks)d. With a neat sketch, explain plate earthing. (06 Marks)

PART _ B5 a. Choose the correct answers for the following : (04 Marks)

i) The number of parallel paths in the armature winding of a four pole, wave connecteddc machine having 28 coil-sides is

A) 28 B) 14 c)4ii) The e.m.f generated by a given dc generator depends upon

A) the flux only B) the speed onlyC) bothflux and speed D) the terminal voltage

iii) The back e.m.f in a dc motor is given as

A) V+IaRa B) V-r"& C) V D) I^R"

B)50Aand25AD) 62.5 A and 12.5 A

iii) If the fuel load core loss of a transformer is 100 W. its core loss at half load wj{ffi}oA) 200 w B) 1oo w c) 50 w D)Zs yr6ffio.)

iu) A transformer operates at maximum efficiency, when ,t q

- \?A) core losses minimumB) copper loss minimumC) core loss : copper lossD) none of these

b. Derive expressions for the r.m.s values of induced voltages in thephase transformer connected to a sinusoidal supply.

c. Deduce the condition tbr maximum efficiency in a single-phase transformer. (05 Marks)d. A transformer is rated at 100 kVA. At full load its copper loss is i200 W and its iron loss is

960 W. Calculate:i) The efficiency at full load, OPF.ii) The efficiency at half load, 0.8 pf.iii) The load kVA at which maximum efficiency will occur.

D)2

iv) The speed of the d.c. motor isA) directly proportional to both its back emf and fluxB) inversely proporlionalto both its back emf and fluxC) directly proportional to flux but inversely proportional to its back emfD) directly proportional to its back emf but inversely proportional to flux

b. Explain working of d.c. motor and hence derive an equation lor torque. (08 Marks)c. An 8-pole generator has 500 armature conductors and has a useful flux per pole of

0.065 Wb. What will be the e.m.f. generated if it is lap connected and runs at 1000 rpm?What must be the speed at which it is to be driven to produce the same emf if it is wavewound? (08 Marks)

6 a. Choose the correct answers for the following : (04 Marks)i) The core of a transformer is assembled with laminated sheets so as to

A) reduce hysteresis lossB) reduce Eddy current lossC) both hysterisis and Eddy current lossD) copper loss

ii) A single phase, 5 kVA, 200 Vi100 V, transformer has rated primary and secondarycurrents at rated voltageA)25Aand50AC) 12.5 A and 62.5 A

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(05 Marks)

(06 Marks)

10ELE1s/25

7 a. Choose the correct answers for the following : (04 Marks)i) In synchronous generators

A) the field poles are stationary and the armature conductors rotateB) the armature conductors are stationary and the field poles rotateC) field and armature both are stationaryD) none of these

ii) A 4-pole, 1200 rpm alternater will generate an emf at a frequency ofB) 50 HzA) 60 Hz

iii) Full pitch windings have coil span ofA) 180" B) goo

iv) The current from an alternator is taken out to external load circuit through

C) 40Hz

c) 270'

D) 25 Hz

D) 360"

A) commutator segmentsC) carbon brushes

B) slip-ringsD) solid connectiofl

b. By means of a neat diagram, describe the main parts of an alternator with their functions.

A 3-phase, 6-pole, star-connected alternator revolves at 1000 rp*. rn. stator nu. ,[o3r]rl'ut)and 8 conductors per slot. The flux per pole is 0.05 Wb (sinusoidally distributed). Calculatethe voltage generated by the machine if the winding factor is 0.96 line and phase value.

(08 Marks)


il ln a three phase induction motorA) rotor conductors are open circuitedB) rotor conductor are short circuitedC) stator winding is openD) none of these

ii) The relation between N,. Fand P of three-phase inductor is

(04 Marks)


A) N.=r20 f

iii) When speed ofthe induction motor is zero, its slip isA) zero B) 0.s C) one

iv) The number of slip rings in a three phase wound rotor induction motor is

A)3 B)4 c)e D)2Explain the, principle of operation of a three phase induction motor.With the help of neat circuit diagram, explain star-delta stafter.

B)N,=ry c) r=# D)f=+D) infinity

b.

c.

d. A 3-phase, 6-pole, 50 Hz induction motor has a slip of lo/o at no load. and 3Yo at fuIl load.Determine: i)synchronous speed ; ii) no-load speed ; iii) full-load speed : iv) frequency ofrotor current at stand still ; v) fiequency of rotor current at full load. (05 Marks)

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4of4

USN

06crv18/28

Question Paper Version : D

I I ll Semester B.E Degree Examination, Dec.2013 I Jan.20l4

Time: 2 hrs.l

prohibited.

1.

,

3.

4.

5.

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

Use only:Btack ball point pen for writing / darkening the circleS:

For each qrrestion, after selecting your answer, darkcu the appropriate circle

corresponding to the same question number on the OMR sheet.

Darkening two circles lor the same question malg1the answer invalid.

Damaging/overwriting, ,trsing whiteners on the OMR sheets are strictly

ENVIRONMENTAL STUDIES

(coMMoN TO ALL BRANCHES)[Max. Marks: 50

INSTRUCTIONS TO THE CANDIDATES "..............".

,:::,,:::'

1. Population growth in developing countries creates environmental and socio - economicproblems such as

a) Povertyc) Food problems

b) Natural resource depletiond) All of these

Climate and Global air c'irculations are mainly affected by the properties ofa) Water and Air , -.'" b) Temperaturec) Precipitation d) None of these

3. Reduction of'green house gases can be achieved bya) Improving the efficiency of electricity generationb) Switching to less polluting fossil fuelsc) Both (a) & (b)d) None of these

40, Ozone layer present in. a) Troposphere b) Mesosphere c) Stratosphere

. ...:

d) Thermosphofe

5. To achieve the goal of clean environment, important strategies required area) Effective laws b) Active participation of the publicsc) Active participation of NGO's d) Both (a) & (b)

6. Least controllable man made source of pollutiona) Thermal power plants b) Exhausts of automobilesc) Chemical and industrial effluents d) Domestic cooking

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t$li3ftdr'it,f

-D1 -

06cIV18/28

21. Which of the conceptual sphere of the environment is having the less storage capacity formattera) Bio sphere b) Hydrosphere c) Lithosphere d) Atmosphere

22. Ecology is defined as the study ofa) relation between organisms to their environment.b) relation between groups of organisms to their environment

: ::"

d) All of these

Nations providing the

c) both (a) and (b) d) None of these

a) Each cou,rrtries total food supplies b) Dietary differenoeB.of the countriesc) Quality of food produced d) None ofthese-,, ,,

23. Which of the following is the terrestrial system?a) Forest b) Grassland c) Desert

Food and Agricultural organizatron (FAO) of the Unitedinformatisn on

,(

26.

Social security is one of the most impofiant programmes providing benefits toa) Worker / Employee b) Un - employee c) Families of deceased d) All of these

The first United Nationaicooference on Human environment was held ata) New York b) Stockholm c) Montreal

27. World Environmental day is celebrated ona) June 5 b) August tr5' I ,' c) December 5

. l:,.

i

28. The Environmental (protection) Act oflrrdia was enacted in the yeara) 1986 c) 1984

29. The objectives of wild Ufe 6roiection) Act lg72i;a) To preserve the bio - diversityb) To maintain essenlial ecologicaland life supporting systemc) Protection and conservation of wild Iifed) All of these

30. The study of,environmental system and their interaction is fall underb) Environmental Engineeringa) Environhental Science

c) Eqlironmental Management

31. Norrnal sound level of a quiet speech isa) 120dB

b) l99Z'',,,,,,,"

b) 90dB

d) Basal

d) September 5

d) 1974

d) s0dB

d) Both (a) & (c)

c) 140dB

b) Incinerationd) Land filling

b) Industrial revolutiond) Green revolution

-D3-

?,

J]'.

Disposal of bio - medical waste is bya) Autoclaving and landfillingc) Both (a) & (b)

Activated sludge process isa) Anaerobic method b) Aerobic method c) Both (a) & (b) d) None of these

34. The major cause for the global population increase in the 19th century was due toa) Decrease in birth ratec) Decrease in death rate

USN

10crP18/28

Question Paper Version : A

I I ll Semester B.E Degree Examination, Dec.2013/Jan.20l4

CONSTITUTION OF INDIA AND PROFESSIONAL ETHICS

Time: 2 hrs.](coMMoN TO ALL BRANCHES)

[Max. Marks: 50

TNSTRUCTIONS TO THE CANDIDATES1. Answer all the fifty questions, each question carries one mark.

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

3. For each question, after selecting your answer, darken the appropriate circle

corresponding to the same question number on the OMR sheet.

4. Darkening two circles for the same question makes the answer invalid.

5. Damaging/overwriting, using whiteners on the OMR sheets are strictly

prohibited.

1. The basic feature of the Indian constitution is found in :

b) Fundamental rightsd) Directive principles of state policy

Original constitution classified fundamental rights, into seven categories but now thereare,

a) Eight b) Sixc) Regrouped into social, economic and political d) Five

a) Fundamental dutiesc) Preamble

a) Pollingc) Announcement of results

a) Vice Presidentc) Chiefjustice of supreme court

b) Counting of votesd) None of these

b) Prime ministerd) Speaker oflok sabha

4. The Indian Federal system is based on the Federal system of,a) Canada b) usA c) France d) Newzealand

Engineers must:a) Recognize the value of a code of Ethics b) Support a code of ethicsc) Look upon a code of ethics as a sabred writ d) Both (a) and (b).

The President of India takes the Oath of office before the:

7. 'Judicial Review' means:a) Reviewing the lower court judgement b) Revieving the laws passed by the legislaturec) Examining the actions of executives d) Advising the president of India.

-A1-

26. How many subjects are there in the central, state and concurrent list:a) 97, 66 and 41 b;) 47,66 and 98cl 97.47 and 65 d) 47.96 and 55

27. Village Panchayats (Article - 40) are the best examples for India'sgovernment.a) Republican b) Secular c) Sovereign d) Democratic

28. The fundamental duties of Indian citizens were incorporated in the constitution in:a) 1952 ; c) 1980

The other names for Rajya Sabha are:a) Upper housec) A Federal house

The term'Ethics' is derived from:a) Ethical in Englishc) Custom

The Governor of a state acts as:

a) Real executive of a state

c) Secretary of president

Jobs are reserved for SCs and STs,a) For promotionsc) For appointments and promotions

10cIP18/28

b) Council of statesd) All the above

b) 'Ethic' in Latind) Ethics in Greek.

b) Agent of Presidentd) Advisor to central government

b) For appointmentsd) On the basis of their annual income

form of

d) 198s

b) Communist state in our countryd) Atlofthese

b) Right to reputationdt Right to life

, "",' ..'t,,

b) Chiefjustice of high courtd; Governor

b) 1976

29, The aim of the Directive principles of state policy is to establish:

30. Sexual harassment of working women in working places is violation of,

a) Capitalist state in our country:,,c) Wellare state in the country

a) Right to professionc) Right to personal liberty

34. One of the ways of misusing the truth is:

a) Exaggerating the truthc) Making confused statement

32, Exclusion of Creamy layer makes a backward class:a) Socially backwardc) More backward

33. Special majority means more than,a) 50% majorityc) 75% majority

b) Truly backwardd) Economically backward

b) Two-third majorityd) 60oh majority

31. The chief minister of a state is appointed by the:a) Speakerc) Prime minister

35. The constitution empowers state government to make special law for:

b) Making wrong statementd) Failure to seekout the truth

b) Teachers c) Women and Children d) Farmers

-A3-

a) Workers

1st and 2and Semester Physics Streem (2013-December) Question Papers

Education

Transcript of 1st and 2and Semester Physics Streem (2013-December) Question Papers