MANAGEMENT SCIENCE

Code No: V3112/R07 Set No. 1
III B.Tech I Semester Regular Examinations, November 2009
POWER ELECTRONICS
(Electrical & Electronic Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. (a) Obtain the state variable model for the circuit as shown in figure 1a.
Figure 1a
(b) Obtain the transfer function representation for a system represented by ma-
trixes.
A =
2
4
0 1 0
0 0 1
−10 −2 −3
3
5
b =
2
4
0
0
1
3
5
c = 2 1 0 . [8+8]
2. (a) Find the CTFS harmonic function of x(t) = cos 50 t − /4 withTF = To
(b) Determine the RMS and average value for the following waveform. As shown
in figure 2b [8+4+4]
Figure 2b
3. (a) An AM signal is given by
f(t) = 10 sin (2 106t) + [8 cos (2 103t) + 6 sin (2 102t)] sin 2 106t
Find the F.T. Draw the spectrum.
1 of 3
Code No: V3112/R07 Set No. 1
(b) Find the FT of a periodic train of triangular pulse with period T, base width
of 2 and attitude A as shown in figure 3b using double integration property.
[8+8]
Figure 3b
4. (a) Find the LT of the following functions.
i. f(t) = Kt K is a real constant >1
ii. f(t) = t 1(t)
(b) The impulse response of a certain linear system is given by
h(t) =
−2t
e u(t) t 0
= 0 t < 0
using the convolution integral, determining the response y(t) due to the ramp
input
x(t) = 0 t < 0
= t t 0. [8+8]
5. (a) Write briefly on Hurwitz polynomials.
(b) Z(s) = 2s2+s+2
s2+s+1 is p.r. Determine min (Re Z(jw)) and synthesize Z(s) by
removing min (Re Z(jw)). [8+8]
6. (a) Synthesis the impedance function Z(s) = (s2+2)(s2+4)
s(s2+3)(s2+5) using second form of
Cauer network.
(b) Synthesize L-C Immitance function in the second Cauer form. Z(s) = 2(s2+1)(s2+9)
s(s2+4) .
[8+8]
7. (a) Define Energy density spectrum. How is it useful in analyzing a spectrum?
Or give the interpretation of Energy density.
(b) Define Power density spectrum. Give the interpretation of power density.[8+8]
8. (a) Find the inverse z-transform of X(z) = 2+z−2+3z−4
z2+4z+3 , |z| > 0.
(b) Determine ROC for
2 of 3
Code No: V3112/R07 Set No. 1
i. x1(n) = 7 1/3 n
u[n] − 6 1/2 n
u[n]
ii. x2(n) = 1/3 n
Sin ( /4n) u[n]. [8+8]
? ? ? ? ?
3 of 3
Code No: V3112/R07 Set No. 2
III B.Tech I Semester Regular Examinations, November 2009
POWER ELECTRONICS
(Electrical & Electronic Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. (a) Obtain the state variable model for the circuit as shown in figure 1a.
Figure 1a
(b) Obtain the transfer function representation for a system represented by ma-
trixes.
A =
2
4
0 1 0
0 0 1
−10 −2 −3
3
5
b =
2
4
0
0
1
3
5
c = 2 1 0 . [8+8]
2. (a) Calculate the RMS and average value of the voltage shown in figure 2a.
Figure 2a
(b) Find the periodic waveform shown in figure 2b. Find the exponential Fourier
series. [8+8]
1 of 3
Code No: V3112/R07 Set No. 2
Figure 2b
3. (a) The waveform V(t) has the fourier transform V(f) Show that the waveform
delayed by time td i.e. V(t-td) has the transform of V (f)e−j!td .
(b) Show that the time derivative ! d
dt v(t) has the transform (j2 f) V (f).
(c) Show that the transform of the integral of V(t) is given by
F hR t
− V ( )d i = V (f)
j2 f . [5+5+6]
4. (a) Find the LT of the following functions.
i. f(t) = Kt K is a real constant >1
ii. f(t) = t 1(t)
(b) The impulse response of a certain linear system is given by
h(t) =
−2t
e u(t) t 0
= 0 t < 0
using the convolution integral, determining the response y(t) due to the ramp
input
x(t) = 0 t < 0
= t t 0. [8+8]
5. (a) Check if the polynomial H(s) = 2s4 + 5s3 + 6s2 + 2s + 1 is Hurwitz or not.
(b) Check whether the function N(s) = 2s2+2s+1
s3+2s2+s+2 is a positive real function.
[8+8]
6. (a) The Z(s) of LC network is given by Z(s) = 10s4+12s2+1
2s(s2+1) . Find the first form of
Cauer LC network.
(b) An admittance function is given by Y (s) = (s+4)(s+6)
(s+3)(s+5) ; Find the RL network
following Foster form of realization. [8+8]
7. (a) Explain the effect of aliasing on a sinusoidal signal.
(b) A signal g(t) = cos 10 t + 2 cos 280 t is ideally sampled at fs=300Hz. If the
sampled signal is passed through an ideal LPF with a cutoff frequency of
250Hz, what frequency components will appear in the output?
2 of 3
Code No: V3112/R07 Set No. 2
(c) The spectral range of band pass signals extends from 10.00MHz to 10.4MHz.
Find the minimum sampling rate. [5+5+6]
8. Use the derivative property, to find the Z-transform of the following sequences:
(a) x1(n) = n !1
2 n
u(n − 2)
(b) x2(n) = 1
n(−2)−nu(−n − 1) [2 × 8]
? ? ? ? ?
3 of 3
Code No: V3112/R07 Set No. 3
III B.Tech I Semester Regular Examinations, November 2009
POWER ELECTRONICS
(Electrical & Electronic Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. (a) Obtain the state variable model for the circuit as shown in figure 1a.
Figure 1a
(b) Obtain the transfer function representation for a system represented by ma-
trixes.
A =
2
4
0 1 0
0 0 1
−10 −2 −3
3
5
b =
2
4
0
0
1
3
5
c = 2 1 0 . [8+8]
2. (a) Find the Fourier series of the function whose periodic waveform is shown in
figure 2a.
Figure 2a
(b) Discuss the average power of periodic non-sinusoidal waveform. [8+8]
3. (a) Determine the F.T. of a trapzoidal function and triangular RF pulse f(t) shown
in figure 3(a)i, figure 3(a)ii. Draw its spectrum.
1 of 3
Code No: V3112/R07 Set No. 3
i. Figure 3(a)i
Figure 3(a)i
ii. figure 3(a)ii
Figure 3(a)ii
(b) Show that a normalized Gaussian pulse is its own fourier transform. [8+8]
4. (a) It is given that
f(s) = as2+bs+c
s3+2s2+s+1 find a,b and c such that f (0+) = f1 (0+) = fn (0+) = 1
(b) Find the LT’s for the waveforms shown in figure 4(b)i, figure 4(b)ii.
i. Figure 4(b)i
Figure 4(b)i
ii. Figure 4(b)ii
Figure 4(b)ii
2 of 3
Code No: V3112/R07 Set No. 3
5. (a) Find the range of value of ‘a’ so that H(s) = s4 + s3 + as2 + s + 3 is Hurwitz.
(b) Find the even and odd parts of impedance function Z(s) = 1+s+s2
(4+s+s2) and hence
find out Re Z(s) and Im Z(s) is positive real as well as realizable. [8+8]
6. (a) Synthesize F(s) in second Cauer forms Z(s) = 2(s+1)(s+4)
(s+6)(s+2)
(b) Realize the first Cauer forms of the impedance function Z(s) = (s+1)(s+3)
(s+2)(s+4) .
[8+8]
7. A periodic signal f(t) shown in the figure 7 is transmitted through a system with
transfer function H(w). For these different values of T (T = 2 /3, /3 and /6),
find the power density spectrum and the power of the output signal. Calculate the
power of the input signal f(t). [16]
Figure 7
8. Explain with the help of an example, how the ROC is spread for
(a) Right sided sequence
(b) Left sided sequence
(c) Two sided sequence
(d) Finite duration, anti causal sequence. [4 × 4]
? ? ? ? ?
3 of 3
Code No: V3112/R07 Set No. 4
III B.Tech I Semester Regular Examinations, November 2009
POWER ELECTRONICS
(Electrical & Electronic Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. (a) Obtain the state variable model for the circuit as shown in figure 1a.
Figure 1a
(b) Obtain the transfer function representation for a system represented by ma-
trixes.
A =2
4
0 1 0
0 0 1
−10 −2 −3
35
b =2
4
0
0
1
35
c = 2 1 0 . [8+8]
2. (a) The waveform shown in figure 2a is used as sweep in radar and television
circuits. Find the Fourier series and plot the spectrum.
Figure 2a
(b) A waveform of shape shown in figure 2b is applied to the following network.
Calculate current through resistor. [8+8]
1 of 3
Code No: V3112/R07 Set No. 4
Figure 2b
3. (a) Find the FT of the functions. As shown in figure 3(a)i, figure 3(a)ii
i. figure 3(a)i.
Figure 3(a)i
ii. figure 3(a)ii
Figure 3(a)ii
(b) Let x(t) = e− tu(t). Using this function show the relationship between Laplace
transform (LT) and Fourier transform (FT). For what values of a, the LT and
FT exist. [8+8]
4. (a) By means of convolution integral, evaluate the inverse LT of the following
function.
i. s
(s+a)2
2 of 3
Code No: V3112/R07 Set No. 4
ii. 1
(s+a)(s+b)
(b) A network consisting of a resistor 4 ohms and inductor 1 henry is driven by a
unit impulse at time t = 3 seconds. Find the current i(t). [8+8]
5. (a) What are the properties of LC driving point immitance function?
(b) Find the range of ‘a’ so that H(s) = 2s4 + s3 + as2 + s + 2 is Hurwitz. [8+8]
6. (a) The Z(s) of LC network is given by Z(s) = 10s4+12s2+1
2s(s2+1) . Find the first form of
Cauer LC network.
(b) An admittance function is given by Y (s) = (s+4)(s+6)
(s+3)(s+5) ; Find the RL network
following Foster form of realization. [8+8]
7. For a low pass signal with a bandwidth of 6000Hz, what is the minimum sampling
frequency for perfect reconstruction of the signal? What is the minimum required
sampling frequency if a guard band of 200Hz is required? What is the minimum
required sampling frequency and the value of ‘K’ for perfect reconstruction if the
reconstruction filter has the following frequency response
H(f) =8<
:
K , |f| < 7000
K − K( |f| − 7000/3000, 7
0 , otherwise
000 < |f| < 10000 . [16]
8. Consider a system described by the Differential Equation y(n) = y(n−1)−y(n−2)+
0.5x(n)+0.5x(n−1) Find the response of this system to the input x(n) = (0.5)nu(n)
with initial conditions y (-1) = 0.75 & y(-2) = 0.25. [16]
? ? ? ? ?
3 of 3
Code No: V3117/R07 Set No. 1
III B.Tech I Semester Regular Examinations, November 2009
MACHINE TOOLS
(Mechanical Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. (a) What is the difference between chipping and spalling?
(b) Explain how tool life curves are established?
(c) Discuss working principle of strain gauge dynamometer. [5+5+6]
2. Discuss various tool holding devices or methods in capstan and turret lathe. De-
scribe one method with sketch on each lathe. [16]
3. (a) Explain with neat sketch various mechanisms for table drive in shaper.
(b) Explain with neat sketch various work holding devices in planer indicating
special features if any. [8+8]
4. (a) What is tap? How the taps are classified? And explain their salient feature.
(b) How tap nomenclatures is described? Explain. [8+8]
5. (a) How do you determine the forces acting on a milling cutter?
(b) Explain the procedure of milling a gear by formed - disc cutter. [8+8]
6. (a) Explain different types of bonds used in the manufacturing of grinding wheels.
(b) What is wheel glazing and loading of the grinding wheel? [8+8]
7. Compare the broaching operation with that of any other metal machining operation
for the purpose of generating constant inside contours. Show sketches of some
example jobs made using broaching. [16]
8. (a) Discuss the advantages and disadvantages of hydraulic clamping devices over
other types of clamping devices.
(b) Write a note on the economic analysis of jigs and fixtures. [8+8]
? ? ? ? ?
1 of 1
Code No: V3117/R07 Set No. 2
III B.Tech I Semester Regular Examinations, November 2009
MACHINE TOOLS
(Mechanical Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. (a) A Mild Steel tube 42 mm outside diameter is turned on a lathe. The following
data was observed. Rake angle 320, cutting speed 18m/min, feed 0.12 mm/rev,
length of chip 52mm, cutting force 180 kg, feed force 60kg. Calculate chip
thickness ratio, chip thickness, shear plane angle, chip velocity and coefficient
of friction and power.
(b) When turning a 400 mm diameter on a lathe, the force exerted on the tool
was found to be 50 N. If the machine is running at a speed of 300 rpm find
the work alone per min. [8+8]
2. (a) Explain with schematic diagram the principle of thread cutting on a lathe.
(b) Find out the relation between ratio of change gears to the work pitch and lead
screw pitch. The pitch of lead screw is 6mm and the pitch of the thread to be
cut is 1.5mm. Find the change gears. [8+8]
3. Describes the working principle of quick return mechanisms used in shaper with
sketches. [16]
4. (a) Explain the terms with sketch trepanning, counter boring, and counter sinking
operations.
(b) Discuss various types of drill bits with their features. [8+8]
5. (a) Classify the milling cutters according to the method of mounting the cutter.
(b) Write a note on the carbide-tipped milling cutters. [8+8]
6. (a) What are common devices used for ‘dressing’ of grinding wheels? Describe in
brief.
(b) Explain ‘Through feed’, ‘In feed’ and ‘End feed’ methods of centreless grinding.
Where are they used? [8+8]
7. (a) What is lapping? Write in detail any three types of lapping.
(b) Write a brief notes on the following:
i. Super finishing
ii. Cylindrical super finishing
iii. Flat and spherical super finishing
iv. Polishing. [8+8]
8. (a) Discuss the advantages and disadvantages of hydraulic clamping devices over
other types of clamping devices.
1 of 2
Code No: V3117/R07 Set No. 2
(b) Write a note on the economic analysis of jigs and fixtures. [8+8]
? ? ? ? ?
2 of 2
Code No: V3117/R07 Set No. 3
III B.Tech I Semester Regular Examinations, November 2009
MACHINE TOOLS
(Mechanical Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. Show and explain with neat sketch speed spectrum of AP, GP LP and HP and
explain which one is suitable for speed gearbox and feed gearbox? Justify. [16]
2. Why are brazed tiptools popular? What are the techniques of brazing the tips with
the tool shank? Describe. [16]
3. Explain with neat sketch various feed mechanisms in shaper. [16]
4. (a) Explain the terms with sketch trepanning, counter boring, and counter sinking
operations.
(b) Discuss various types of drill bits with their features. [8+8]
5. (a) What are the differences in the geometry and application of the following
milling cutters?
i. peripheral
ii. face
iii. side.
(b) What is the difference among plain, compound and differential indexing?[8+8]
6. (a) The performance of a grinding wheel depends on type of abrasive grain size,
structure and bonding material. Discuss the effect of each.
(b) Describe a grinding wheel structure with the help of a neat sketch and state
different abrasive materials used in it. [8+8]
7. (a) What is turn broaching? Explain.
(b) Explain the design consideration in broaching. [8+8]
8. (a) Explain the design principles of drill jigs.
(b) Name the essential features of milling fixtures. [8+8]
? ? ? ? ?
1 of 1
Code No: V3117/R07 Set No. 4
III B.Tech I Semester Regular Examinations, November 2009
MACHINE TOOLS
(Mechanical Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. Define chatter in machine tool. What are the causes of chatter and what are the
various techniques available to eliminate chatter? [16]
2. (a) Explain the five main parts of a lathe
(b) How is power transmitted from the lathe spindle to
i. feed shaft
ii. lead screw? [8+8]
3. Explain with neat sketch various feed mechanisms in shaper. [16]
4. (a) Explain the terms with sketch trepanning, counter boring, and counter sinking
operations.
(b) Discuss various types of drill bits with their features. [8+8]
5. Explain the working principle and constructional details of horizontal milling ma-
chine with the help of neat sketch. Discuss the important cutting tools required to
perform the various operations on this machine. [16]
6. (a) What are common devices used for ‘dressing’ of grinding wheels? Describe in
brief.
(b) Explain ‘Through feed’, ‘In feed’ and ‘End feed’ methods of centreless grinding.
Where are they used? [8+8]
7. (a) What are different working motions of a lapping tool. Give the kinematic
scheme to obtain them.
(b) Explain the constructional features of speed and feed units of broaching tool.
[8+8]
8. (a) State the basic rules of location.
(b) Discuss the various types of drilling jigs. [8+8]
? ? ? ? ?
1 of 1
Code No: V3118/R07 Set No. 1
III B.Tech I Semester Regular Examinations, November 2009
ANTENNAS & WAVE PROPAGATION
(Electronics & Communication Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. (a) Establish the relations between directivity and effective area, directivity and
effective length.
(b) An antenna has a radiation resistance of 63 ohms and a lossy resistance of 6
ohms. If the power gain is 30, Calculate the directivity and the efficiency of
the antenna. [8+8]
2. (a) Show that the radiation resistance of a small loop is equal to 320 4(A/ 2)
ohms where A is loop area.
(b) What is Folded Dipole ? Find its Radiation Resistance. [8+8]
3. (a) Enumerate the advantages and disadvantages of linear arrays.
(b) Find the phasing required to steer a beam zenith to -400 for a 5 element array
with 0.4 inter element spacing. [8+8]
4. (a) Design a Rhombic Antenna to operate at 20MHz when the angle of elevation
= 100.
(b) Describe the Non Resonant V-antenna. [8+8]
5. (a) Write short notes on ‘Yagi Aerial’.
(b) What is Corner Reflector Antenna? Derive the expression for the group pat-
tern of system of images due to a 600corner reflector. [8+8]
6. (a) Define Zoning. Discuss the merits and demerits of zoned antennas.
(b) With reference to aperture blocking, describe the performance of paraboloids
and center. [8+8]
7. (a) What is Angle of Tilt? How does it affect the field strength at a distance from
the transmitter?
(b) A 150m antenna transmitting at 1.2MHz by ground wave has an antenna
current of 8A. What voltage is received by a receiving antenna 40kms away,
with a height of 2meters? [8+8]
8. (a) Establish the mathematical relation for
i. Radio Horizon
ii. Radius of curvature of array path for LOS waves.
(b) Show that the field strength due to space wave given by
E = (2E0/d)sin(2 hthr/ d). [8+8]
? ? ? ? ?
1 of 1
Code No: V3118/R07 Set No. 2
III B.Tech I Semester Regular Examinations, November 2009
ANTENNAS & WAVE PROPAGATION
(Electronics & Communication Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. (a) Derive an expression for electric field of a uniform current element and hence
explain its directional pattern.
(b) If maximum current in the antenna is 20amps, find the field intensity at a
distance of 2kms along the axis perpendicular and at an angle 300 from the
antenna. [8+8]
2. (a) Show that the field strength from an antenna with gain G, radiating P watts
of Power is given by E = 1/r(30PG)1/2 v/m, if the impedance of free space is
120 .
(b) Derive the expression for power radiated in case of quarter wave monopole
and find the power radiated for a peak value equal to 10A. [8+8]
3. (a) Derive the conditions for the linear array of N isotropic elements to radiate in
end fire and find the first two side lobe levels.
(b) Prove that the level of secondary lobe is -13.5dB below that of major lobe in
a uniform linearly array. [8+8]
4. (a) Explain the construction of Rhombic Antenna with balloon and termination.
Draw the radiation pattern of rhombic antenna
i. over perfectly conducting plane.
ii. in the presence of earth.
(b) Derive electric field expression for Non Resonant antenna. [8+8]
5. (a) With reference to paraboloids,explain the following:
i. Aperture Efficiency
ii. Front toBack Ratio
iii. Types of Feeds.
(b) Design Yagi-Uda antenna of six elements to provide a gain of 12dB if the
operating frequency is 200MHz. [8+8]
6. (a) What is an electromagnetic horn antenna? What are its applications? The
length of an E-plane sectoral horn is 15cms. Design the horn dimensions such
that it is optimum at 10GHz.
(b) Calculate the minimum distance required to measure the field pattern of an
antenna of diameter 2m at a frequency of 3GHz. Derive the necessary equa-
tion. [8+8]
1 of 2
Code No: V3118/R07 Set No. 2
7. (a) Discuss the features that lead to fading and attenuation in ionospheric prop-
agation.
(b) What is Wave Tilt? How does it effect the field strength received at a distance
from the transmitter? [8+8]
8. (a) A police radio transmitter operating at a frequency 1.69GHz is required to
provide a ground wave having a strength of 0.5mv/m at a distance of 16km.
The transmitter antenna, having an efficiency of 50% produces a radiating
field proportional of cos . The ground wave has = 5 × 10−5 mho/cm and "r
= 15. Calculate the power transmitted.
(b) Derive the fundamental equation for free space propagation. [8+8]
? ? ? ? ?
2 of 2
Code No: V3118/R07 Set No. 3
III B.Tech I Semester Regular Examinations, November 2009
ANTENNAS & WAVE PROPAGATION
(Electronics & Communication Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. (a) Discuss the current distribution on a thin wire antenna.
(b) Define the following parameters related to antenna
i. Main and Side lobe
ii. Beam Area
iii. Gain and Directivity. [8+8]
2. (a) Starting from the fundamentals, derive an expression for radiated electric field
for half wave dipole and sketch the field strength pattern.
(b) Prove that leff(transmitting) is same as leff(receiving) for any antenna where
leff is effective length of an antenna. [8+8]
3. (a) Calculate
i. HPBW
ii. Solid Angle if a linear array having 10 isotropic point source with /2
spacing and phase difference =900.
(b) Write short notes on Hansen-Wood yard end fire array. [8+8]
4. (a) Describe the construction and properties of Rhombic Antenna.
(b) Describe the characteristics of long wire traveling wave antenna. Sketch their
pattern for lengths of
i. /2
ii. 5
iii. 20 . [10+6]
5. (a) What is a Parasitic Element? Explain how it is used to improve the directivity
of an antenna.
(b) Show the system of images for 900 corner reflector if the point source is located
at a distance of /4 from the apex. Write the expression for the array factor.
[8+8]
6. (a) What is an electromagnetic horn antenna? What are its applications? The
length of an E-plane sectoral horn is 15cms. Design the horn dimensions such
that it is optimum at 10GHz.
(b) Calculate the minimum distance required to measure the field pattern of an
antenna of diameter 2m at a frequency of 3GHz. Derive the necessary equa-
tion. [8+8]
1 of 2
Code No: V3118/R07 Set No. 3
7. (a) What is Fading? Distinguish between Selective fading and Skip fading.
(b) Write short notes on ‘Luxembourg Effect’. [8+8]
8. (a) Write short notes on “M Curves and their characteristics”.
(b) Show that the radius of curvature of ray path is given by 2/(d"r/dh) for
tropospheric waves. [8+8]
? ? ? ? ?
2 of 2
Code No: V3118/R07 Set No. 4
III B.Tech I Semester Regular Examinations, November 2009
ANTENNAS & WAVE PROPAGATION
(Electronics & Communication Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. (a) Derive an expression for electric field of a uniform current element and hence
explain its directional pattern.
(b) If maximum current in the antenna is 20amps, find the field intensity at a
distance of 2kms along the axis perpendicular and at an angle 300 from the
antenna. [8+8]
2. (a) From the expressions for E and H due to radiating element, show the average
power radiated is given by
Pav = Er
rms / 2n w/m2
(b) Explain how an antenna radiates power into free space and list out the prop-
erties of an antenna. [6+10]
3. (a) What is a linear array? State the merits and demerits of linear array.
(b) A uniform linear broad side array operating at 50cm wavelength consisting of
4 half dipoles spaced 25cm apart. Each element carries rf current in the same
phase and magnitude 0.4amp. Calculate
i. Retarded power
ii. Half power beam width. [8+8]
4. (a) Explain the construction of Rhombic Antenna with balloon and termination.
Draw the radiation pattern of rhombic antenna
i. over perfectly conducting plane.
ii. in the presence of earth.
(b) Derive electric field expression for Non Resonant antenna. [8+8]
5. (a) Explain all the structural requirements of a 5 element yagi antenna at 475MHz
accounting for typical spacing, length to diameter ratios and input impedance
Zn.
(b) Explain the geometry, requirements and properties of parabolic reflectors.
[8+8]
6. (a) Write short notes on
i. Accelerating Lenses
ii. Bandwidth and Tolerances of lenses.
(b) Explain the measurement methods for the gain of a parabolic reflector. [8+8]
1 of 2
Code No: V3118/R07 Set No. 4
7. (a) What are different mechanisms of propagation of electromagnetic waves? Ex-
plain.
(b) What is Critical Frequency? What is Virtual Height? Find the maximum
distance that can be covered if the virtual height of the ionospheric layer is
250kms. [8+8]
8. (a) Discuss the characteristics of F1 and F2 layers.
(b) Discuss the reasons for reduction of field strength in sky wave propagation.
[8+8]
? ? ? ? ?
2 of 2
Code No: V3125/R07 Set No. 1
III B.Tech I Semester Regular Examinations, November 2009
COMPUTER GRAPHICS
( Common to Computer Science & Engineering, Information Technology
and Electronics & Computer Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. (a) Consider a non interlaced raster monitor with a resolution of n by m (m scan
lines and n pixels per scan line), a refresh rate of r frames per second, a
horizontal retrace time of t horiz and vertical retrace time of tvert. What is
the fraction of total refresh time per frame spent in retrace of the electron
beam.
(b) Explain the applications for large-screen displays. What graphical output
devices support it? [12+4]
2. (a) Explain the DDA scan conversion algorithm for generating the points on line
segment, when two end-points are given as input.
(b) Digitize the line with end-points (20,10) and (30,18) using DDA algorithm.
[8+8]
3. (a) Derive the matrix for scaling in an arbitrary direction, for any specified scaling
factors about a fixed point (xb, yb).
(b) Prove that the multiplication of transformation matrices for two successive
translations is commutative. [8+8]
4. (a) Illustrate with suitable examples how the three Categories of lines are processed
using Cohen-Sutherland line clipping algorithm.
(b) What is the significance of dot products in decision making is Cyrun-Beck
algorithm? [8+8]
5. (a) Distinguish between boundary representation and space-partitioning represen-
tation of solid object representation schemes.
(b) List and describe the polygon tables representation for polygon surfaces of a
3-D object. Give an example. [8+8]
6. Given a unit cube with one corner at (0, 0, 0) and the opposite corner at (1, 1,
1), derive the transformations necessary to rotate the cube by degrees about the
main diagonal (from (0, 0, 0) to (1, 1, 1) in the counter clock-wise direction when
looking along the diagonal toward the origin. [16]
7. (a) Explain the depth-sorting algorithm for visible surface detection.
(b) What are the special cases in determining the depth-order of surfaces? Explain
the procedure to resolve them with suitable examples. [8+8]
1 of 2
Code No: V3125/R07 Set No. 1
8. Explain the procedure to generate the in-betweens for the key frames. [16]
? ? ? ? ?
2 of 2
Code No: V3125/R07 Set No. 2
III B.Tech I Semester Regular Examinations, November 2009
COMPUTER GRAPHICS
( Common to Computer Science & Engineering, Information Technology
and Electronics & Computer Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. (a) Consider a non interlaced raster monitor with a resolution of n by m (m scan
lines and n pixels per scan line), a refresh rate of r frames per second, a
horizontal retrace time of t horiz and vertical retrace time of tvert. What is
the fraction of total refresh time per frame spent in retrace of the electron
beam.
(b) Explain the applications for large-screen displays. What graphical output
devices support it? [12+4]
2. (a) Devise a parallel method for implementing line-width function.
(b) Show why the point-to-line error is always 1
2 for the mid-point line scan
conversion algorithm. [10+6]
3. (a) Derive the transformation matrix for rotation about origin.
(b) Explain the terms: [8+8]
i. Homogeneous Coordinates
ii. Rigid-body transformations
iii. Composite transformations.
4. (a) Explain how the potentially entering (PE) and potentially leaving (PL) cases
are determined in Cyrus-Beck algorithm.
(b) Contrast the efficiency of Cohen-Sutherland and Cyrus-Beck line clipping al-
gorithms. [8+8]
5. (a) Distinguish between boundary representation and space-partitioning represen-
tation of solid object representation schemes.
(b) List and describe the polygon tables representation for polygon surfaces of a
3-D object. Give an example. [8+8]
6. (a) What are the phases defined in typical viewing pipeline. Explain briefly about
each phase.
(b) Explain the steps involved in transformation form world to viewing coordinates
in 3-dimensional domain. [8+8]
7. (a) Assuming that one allows 224 depth value levels to be used, how much memory
would a 1024 × 768 pixel display requires to store the z-buffer.
1 of 2
Code No: V3125/R07 Set No. 2
(b) How can the amount of computation required by the scan-line method be
reduced? [8+8]
8. (a) How the morphing effects are implemented in key frame system bared anima-
tion languages?
(b) Explain how the kinematic description are simulated in key frame systems.
[8+8]
? ? ? ? ?
2 of 2
Code No: V3125/R07 Set No. 3
III B.Tech I Semester Regular Examinations, November 2009
COMPUTER GRAPHICS
( Common to Computer Science & Engineering, Information Technology
and Electronics & Computer Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. (a) Assuming that a certain full-color (24-bit per pixel) RGB raster system has
a 512 by 512 frame buffer, how many distinct color choices (intensity levels)
would be available.
(b) Explain how virtual reality systems can be used in design applications. [10+6]
2. (a) What are the steps involved in parallel version of Bresenham?s line algorithm
for slopes in the range O <m <1.
(b) What are the steps involved in flood-fill algorithm. [8+8]
3. (a) Derive the matrix for scaling in an arbitrary direction, for any specified scaling
factors about a fixed point (xb, yb).
(b) Prove that the multiplication of transformation matrices for two successive
translations is commutative. [8+8]
4. Explain the algorithm for line clipping using cyrus-Beck algorithm. Illustrate with
suitable examples. [16]
5. (a) Distinguish between boundary representation and space-partitioning represen-
tation of solid object representation schemes.
(b) List and describe the polygon tables representation for polygon surfaces of a
3-D object. Give an example. [8+8]
6. (a) Classify the projections. Explain the properties of each.
(b) Distinguish the parallel projection and Perspective Projection view volumes.
Give suitable examples. [8+8]
7. (a) How does the z-buffer algorithm determine which surfaces are hidden.
(b) Show how the calculation of the intersection of an edge with a scan line can
be made incremental as opposed to absolute. [8+8]
8. Describe in detail about the methods of controlling animation. [16]
? ? ? ? ?
1 of 1
Code No: V3125/R07 Set No. 4
III B.Tech I Semester Regular Examinations, November 2009
COMPUTER GRAPHICS
( Common to Computer Science & Engineering, Information Technology
and Electronics & Computer Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. (a) Consider a non interlaced raster monitor with a resolution of n by m (m scan
lines and n pixels per scan line), a refresh rate of r frames per second, a
horizontal retrace time of t horiz and vertical retrace time of tvert. What is
the fraction of total refresh time per frame spent in retrace of the electron
beam.
(b) Explain the applications for large-screen displays. What graphical output
devices support it? [12+4]
2. (a) Write an algorithm for generating the intermediate points using Bresenham?s
algorithm when two-end points are given as input.
(b) Write an algorithm for polyline function which calls the above algorithm, given
any number (n) of input points. A single point to be plotted when n=1. [8+8]
3. (a) Derive the matrix for scaling in an arbitrary direction, for any specified scaling
factors about a fixed point (xb, yb).
(b) Prove that the multiplication of transformation matrices for two successive
translations is commutative. [8+8]
4. (a) Explain how to determine whether a polygon vertex is inside or outside the
window edge. What is the significance of this routine in determining whether
a polygon edge intersects the window edge.
(b) Justify that the Sutherland - Hodgeman algorithm is not suitable for clipping
when the clipping polygon is a concave window. [8+8]
5. (a) Derive the basis matrix (MB) for Bazier curve.
(b) What are Bernstein polynomials? What is their significance in Bazier curve?
[8+8]
6. (a) How can scaling with respect to a point Po(xo, yo, zo) be defined in terms of
scaling with respect to the origin.
(b) Explain the step-wise procedure in aligning an arbitrary plane with one of the
principal planes. [8+8]
7. (a) Assuming that one allows 224 depth value levels to be used, how much memory
would a 1024 × 768 pixel display requires to store the z-buffer.
(b) How can the amount of computation required by the scan-line method be
reduced? [8+8]
1 of 2
Code No: V3125/R07 Set No. 4
8. What are the issues involved in design of a story board layout with accompanying
key frames for an animation of a single polyhedron. [16]
? ? ? ? ?
2 of 2
Code No: V3136/R07 Set No. 1
III B.Tech I Semester Regular Examinations, November 2009
MANAGEMENT SCIENCE
( Common to Electronics & Instrumentation Engineering and Aeronautical
Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. Define management. State the important characteristics of management. [16]
2. Discuss the features of functional organisation structure. What are the benefits
and limitations? Discuss the situations under which it is more suitable. [16]
3. Explain the utility of outline process chart in method study. Differentiate between
outline process chart and flow process chart. [16]
4. A manufacturer requires 2000 units of an item per annum. The cost of placing an
order is Rs. 10 per order and inventory carrying cost is 16% per year per unit of
average inventory. The purchase price is Re. 1 per unit on the quantities below
1000 units. A discount of 5% is offered if the item is purchased in lots of 1000 units
or above and there is a 7% discount if the whole annual requirement of 2000 units
is purchased in a single lot. Find the economic order quantity and the number of
orders to be placed in a year. [16]
5. What is the purpose of internal mobility? When are demotions necessitated in
organizations? [16]
6. What do you mean by crashing a network? State step by step procedure of crashing.
[16]
7. Describe the strategic management process. What mechanism would you suggest
so that the right strategic plan is formulated? [16]
8. Is re-engineering another fad or does it offer something of lasting value? [16]
? ? ? ? ?
1 of 1
Code No: V3136/R07 Set No. 2
III B.Tech I Semester Regular Examinations, November 2009
MANAGEMENT SCIENCE
( Common to Electronics & Instrumentation Engineering and Aeronautical
Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. Discuss the leadership styles with examples which Indian managers follow. Can
you suggest a best style for them? How? [16]
2. Name the various methods of departmentation. State the advantages of depart-
mentation by function. [16]
3. From the following data you are required to plot a p-chart and draw the conclu-
sions. [16]
S.No Year/Date Number of pieces Inspected Number of defectives found
1 1stJan’2007 400 30
2 2ndJan’2007 400 25
3 3rdJan’2007 400 30
4 4thJan’2007 400 35
5 5thJan’2007 400 40
6 6thJan’2007 400 45
7 7thJan’2007 400 35
8 8thJan’2007 400 45
9 9thJan’2007 400 35
10 10thJan’2007 400 40
Total 10 days 4000 360
4. Describe the marketing mix with its basic elements. [16]
5. Briefly explain the concept of selection. What are the different techniques of se-
lection followed by a Personnel Manager, while employing the personnel in an
organization? [16]
6. What is the difference between a schedule graph based on ES & a schedule graph
based on LS? Explain. [16]
7. Is downsizing a good option for Indian firms? Discuss the proc and cons. [16]
8. Write short notes on:
(a) Capability Maturity Model (CMM)
(b) Just-in-Time (JIT)
(c) Balanced Scored Card. [5+5+6]
? ? ? ? ?
1 of 1
Code No: V3136/R07 Set No. 3
III B.Tech I Semester Regular Examinations, November 2009
MANAGEMENT SCIENCE
( Common to Electronics & Instrumentation Engineering and Aeronautical
Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. Describe how and why scientific management theory gained scientific management
importance? [16]
2. “Organisation structure refers to the differentiation and integration of ctivities,
authority, roles and relationships”. Explain. [16]
3. The following table gives the number of rivets missing at aircraft final inspection.
Prepare appropriate control chart. [16]
S.No Air Plane No. No. of missing Rivets
1 A 8
2 B 16
3 C 14
4 D 19
5 E 11
6 F 15
7 G 8
8 H 11
9 I 21
10 J 12
11 K 23
12 L 16
13 M 9
14 N 25
15 O 15
16 P 9
17 Q 9
18 R 14
19 S 11
20 T 9
21 U 10
22 V 22
23 W 7
24 X 28
25 Y 9
Total 351
4. Explain the following terms with the help of a neat diagram.
1 of 2
Code No: V3136/R07 Set No. 3
(a) Economic order quantity and Lead time
(b) Safety stock and Re-order point
(c) Maximum inventory and Minimum inventory
(d) Average inventory and Inventory consumption trend. [4×4]
5. Examine the importance of training of personnel towards the development of an
organization. [16]
6. The following table lists the jobs of a network along with the time estimates.
Jobs Duration in days
Optimistic Most likely Pessimistic
1-4 3 9 27
1-3 3 6 15
1-2 6 12 30
4-5 1 4 7
3-5 3 9 27
3-6 2 5 8
5-6 6 12 30
2-6 4 19 28
(a) Draw the project network
(b) What is the approximate probability that jobs on the critical path will be
completed by the due date of 35 days
(c) What is your estimate of the probability that the entire project will be com-
pleted by the due date? Explain.
(d) What due date has 90% of chance of being met? [4×4]
7. List out the strategic issues for a soft ware industry in marketing, financial, R&D,
and HRM departments. [16]
8. What are the major ingredients of total quality management? Are some ingredients
more important than the others? Explain. [16]
? ? ? ? ?
2 of 2
Code No: V3136/R07 Set No. 4
III B.Tech I Semester Regular Examinations, November 2009
MANAGEMENT SCIENCE
( Common to Electronics & Instrumentation Engineering and Aeronautical
Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. Discuss the leadership styles with examples which Indian managers follow. Can
you suggest a best style for them? How? [16]
2. What is departmentation? How is it essential for the management of a business
enterprise? [16]
3. The following are the results of daily inspection of a vacuume tube. Compute the
value of fraction defective for each day inspection and plot the p chart. [16]
Year/Date Lot Size (n) No. of defectives
3rd March’2007 1024 30
5th March’2007 2056 48
6th March’2007 16835 86
7th March’2007 16069 108
12th March’2007 7369 59
13th March’2007 8738 29
14th March’2007 1220 10
17th March’2007 16242 112
18th March’2007 15145 76
24th March’2007 5845 88
25th March’2007 13582 154
Total 104125 720
4. “Marketing should aim at meeting a given consumer need rather than selling a
given product.” Comment. [16]
5. What is grievance? How is it different from collective bargaining? [16]
6. (a) What is PERT and what are the applications of PERT?
(b) Define the terms slack and Float. Illustrate [8+8]
7. Is downsizing a good option for Indian firms? Discuss the proc and cons. [16]
8. Write short notes on following:
(a) Enterprise Resource Planning (ERP)
(b) Business Process Outsourcing (BPO). [8+8]
? ? ? ? ?
1 of 1