CRYPTOGRAPHY&NETWORKSECURITY (ComputerScience & …

R-13Code : I3CS3202

B.TECH. DEGREE SUPPLEMENTARY EXAMINATION, OCTOBER 2020III B.Tech. II Semester

CRYPTOGRAPHY & NETWORK SECURITY(Computer Science & Engineering)

Time : 3 hours Max. Marks :60

Answer FIVE Questions, Choosing ONE Question from each sectionAll Questions cany equal marks

•k •* *

SECTION - I

Write about any two classical ciphers and describe their Security limitations.1

2 (a) Illustrate the process of encryption and decryption in DES.(b) Mention the strengths and weaknesses of DES algorithm.

SECTION - II

3 Demonstrate encryption and decryption using RSA Algorithm for the parameters:p=3; q=l1; e=7; M=5.

Give an outline of the mathematical operations employed in Diffie-Hellman keyexchange with suitable example.

4

SECTION - III

(a) What is the role of authentication in network security? Discuss about the concept ofMessage Authentication Code.

(b) Discuss about modular arithmetic.

5

Explain about Fermat’s and Euler’s theorems in detail.6

SECTION - IV

Explain the process of Message digest Generation using MD5 with necessary blockdiagram.

7

(a) What are the properties and applications of Digital Signatures?(b) Explain about Digital Signature Standard.

8

SECTION - V

9 (a) Give the architecture of IP Security.(b) What are the Applications and Services of IP Security?

10 (a) List all the crypto schemes available in Transport Layer Security (TLS).(b) Compare the differences and similarities that exist between the SSL and TLS.

R-13 Code : 13EC3203


OPTICAL COMMUNICATION(Electronics & Communication Engineering)


Answer FIVE Questions, Choosing ONE Question from each sectionAll Questions carry equal marks

* * *

SECTION - I

(a) Draw the block diagram of general optical fiber communication system and explaineach block in detail.

1

(b) Define acceptance angle? Derive the equation for numerical aperture

2 (a) Discuss merits, demerits and applications of Optical fibers.

(b) Compare single mode and multi mode in fibers.

SECTION - II

3 (a) Draw the schematic of Edge emitting double hetero-junction LED and explain itsworking.

( b) Discuss about various Laser diode modes.

4 (a) Explain the concept of reflection fiber noise.

(b) Outline the concepts of fiber connectors.

SECTION - III

5 (a) Explain the operation of PIN Photo detector with neat sketch.

(b) Derive the expression for BER in a digital receiver..

6 (a) Discuss the operation of avalanche photo diode.

(b) Derive the expressions for the responsivity of photo diodes.

SECTION - IV

(a) Explain working principle of fiber amplifiers.7

(b) Illustrate the Active fiber or Doped fiber amplifier with neat schematics.

8 (a) Discuss any two topologies used in broadcast-and-select network in opticalcommunication.

(b) Outline the concept of WDM used in optical communication.

SECTION - V

(a) Write the applications of optical communications in Telegraphy.

(b) Distinguish between passive and active sensing.

10 (a) Explain the components used in optical communication system transmitter.

(b) Write the applications of optical communications in Military

R-13 Code : 13ME3203

B.TECH. DEGREE SUPPLEMENTARY EXAMINATION, OCTOBER 2020

III B.Tech. II Semester

INDUSTRIAL ENGINEERING & MANAGEMENT(Mechanical Engineering )



* * *

SECTION - I

Explain the different types of organization structures with block diagrams and list

theirs advantages, limitations and applications.1

Explain about the tools of management science for solving the managerial problems.2

SECTION - II

What are the different types of layouts? Explain briefly. Discuss about theadvantages, limitations and applications.

3

(a) Explain about the different flow pattern used in plant layout.4

(b) Explain the concept of weber theory.

SECTION - III

(a) What are the different symbols used in process charts? Describe briefly5

(b) What are the objectives of work measurement?

(a) Why work study is valuable for production management?6

(b) Define Time study. Explain the basic steps in a Time study with suitable example.

SECTION - IV

Explains about the different procedural steps involved in the selection processbriefly.

7

Explain any three types of wage incentive plans briefly with advantages andlimitations.

8

SECTION - V

Explain about six sigma concepts. Compare six sigma concepts with TQM concepts.9

10 (a) Write down the underlying principles of TQM.

(b) Illustrate the various steps involved in the customer satisfaction process.

Code : 13EE3211R-13

B.TECH. DEGREE SUPPLEMENTARY EXAMINATION, OCTOBER2020

III B.Tech. II SemesterMODERN CONTROL THEORY

(Electrical & Electronics Engineering)

Max. Marks :60Time : 3 hours


* * *

SECTION - I

Design Lag Compensator for a unity feedback system with open loop transfer

function G(s)=k/s( l+2s) so that phase margin is 40 and steady state error for ramp

input is < 2.0.1

Distinguish the design aspects of Lead, Lag and Lead-Lag compensators.2

SECTION - II

(a) Define controllability and observability. Give the Kalman test for both of them.

(b) Test controllability and obsrvability for the following system.3

roi0 1 00 0 1.0 -2 -3.

C = [1 0 0]B = 0 ;A =LlJ

4 (a) Construct a state model for a system characterized by a differential equation.

y + 6y + 1ly + 6y = u + 8ii +\lii + 8u

(b) Derive the solution of non-homogeneous state equations.

SECTION - III

5 (a) Explain the linear system with full order state observer with neat block diagram,

(b) Explain the method of control system design by pole placement.

6 (a) Derive the solution of homogeneous state equations.

(b) What are the effects of pole placement by state feed back?

SECTION - IV

(a) Derive the describing function of Dead-zone and saturation Non linearity.

(b) What is a singular point? Draw the phase trajectory of the following singular points,

(i) Stable node (ii) Unstable node (iii) Saddle point (iv) Vortex point

7

Consider a non-linear system described by the equations:

- x i + 2 x i2 x2

8x i =x 2 = - X 2

Check the stability of the system by use of variable gradient method.

SECTION - V

(a) State the Lyapunov theorems?Consider a non-linear system described by the equations:x i = - 2 X I + X] X 2

X 2 = - X 2 + X i X 2

9(b)

0Investigate the stability about the equilibrium point X =

10 (a) Derive the necessary and sufficient conditions for the direct method of Lyapunov forthe stability of linear continuous autonomous systems.

(b) Determine stability of system described by the following equation X = AX, Where

n :2JA =

R-13 Code : 13CE3203


III B.Tech. II SemesterSTRUCTURAL ANALYSIS - II

(Civil Engineering)



•k * *

SECTION - I

A beam of CB of 7m long is fixed at A and simply supported at B and has an internalhinge at C , 4m from the support A. Draw the influence line diagrams for (I) Reaction

at support A (ii) Reaction at support B (iii) Bending moment at A (iv) Bending

moment at D, middle point of AC.

1

Draw the influence line for the reactions at supports A,B,C and bending moment at

support B for the simply supported ABC there is a hinge provided at D between

center of B & C , span of AB =6m, BC =6m. Find the maximum values whentravelling loads of 60kN/m may cover any part of the span.

2

SECTION - II

Find the forces in BC and ED of the truss shown. All the members have equal area

of cross of 1000mm23

B C

60“60“ 60°60“:lAr

j i7 E

2 m2 m1 r

80 kN

Determine the forces in truss as shown below. The cross section area of AD and DE

are 1500 mm2 and rest of the members are 1000mm2. Take E as 200GPa.4

/

////

4 m /////

//1

1 m

SECTION - III

Analyse the beam given below by slope deflection method and draw SFD and BMDfor the beam.

5

12 kN2kH/m

/ 3mm *4 U U U l I XA X c/ X.A AW/

B

i* *i6m 6m

Determine the support moments for a continuous beam of ABCD, supports A & D arefixed and remaining supports B & C are simply supported. Span of AB = 3m carries aUDL of 30kN/m, span BC= 2m carries a central point load of 80kN and span CD=3m carries a UDL of 40kN/m if the support B sinks by 3.5mm . For all the members1= 2.5 X 106 mm4 and E = 200GPa. Draw BMD using moment distribution method.

6

SECTION - IV

Find the bending moments at A,B, C,D for the portal frame shown in the figure . Bykani's method and draw the bending moment diagram.

7

STo fcNm :C-, TFT

A vnCO cmr? :::

A JX—1

Analyze the building frame shown in figure by portal frame method, And draw theshear force diagram.

8

200 kN

f4 m

500 kN *4 m

m f / r /5 m >7t T 5 m

SECTION - V

Determine the value of W required to cause collapse of the frame as shown infigure.If the plastic moment of all the members of the frame is 200kN-m. Calculatealso the support reactions at the collapse.

9

WDB i f

T-W > c2 m

E v4 m mm

A> *

2 m 2 m><

A simply supported beam has cantilever overhang and supports loads as shown in thefigure . Determine the collapse load of the beam , stating the position ofcorresponding plastic hinge.

10

W w2WA B - C- D E

V/////

<tr > *: * * *U3 U3 U3 U2

R 13 Code :13CS3201


COMPUTER GRAPHICS(Computer Science & Engineering)



•k * *

SECTION - I

1 (a) Explain briefly the classification of computer graphics?(b) Nominate an application of computers that can be accommodated by either textual or

graphical computer output. Explain when and why graphics output would be moreappropriate in this application.

(a) Explain flood filling and boundary filling methods. Give its two real time exampleswhere they are used.

(b) Express aline from (10, 12) to (20, 16) on a raster screen using Bresenham’sstraight line algorithm. Show the result on a Cartesian graphy.

2

SECTION - II

3 (a) What are the different hardware and software of graphics?

(b) Explain any two input devices for operator interaction.

(a) Briefly explain about homogeneous coordinates with an example.(b) Derive the window-to viewport transformation equations by first scaling the window

to the size of the view port and then translating the scaled window to the viewportposition.

4

SECTION - III

(a) Write a routine to convert the polygon definition of a three-dimensional object intoan octree representation.

(b) Illustrate 3d scaling with examples?

5

Find the equation of a Bezier curve which passes through the points(0,0) and (-2,1)and is controlled through the points (7,5) and (2,0) . Also, explain the concept of acubic Bezier curve.

6

SECTION - IV

(a) Explain Boolean operations on objects through an example. It should involve atleast4 operations

(b) How to control the spectral density of the fractal curve? Explain briefly?(a) Explain the Z-buffer algorithm.

(b) Compute the ray-sphere intersection equation using the quadratic formula, and showhow it can be simplified to determine only whether or not the ray and sphereintersect.

7

8

SECTION - V

Explain the following two types of smooth shading?(i) Gouraud shading (ii)Phong shading

9

10 (a) Define animation and explain the its basic rules .

(b) Differentiate between computer based and conventional animation.

Code :13EC3202R 13


MICROWAVE TECHNIQUES(Electronics & Communication Engineering)



* * *

SECTION - I

(a) Describe the working of two cavity klystron using Applegate diagram

(b) Show that maximum achievable efficiency of reflex klystron is 22.78%.

1

2 (a) Generate the gain of TWT using propagation constants

(b) Illustrate the importance Pi-mode of operation cylindrical magnetron

SECTION - II

3 (a) Explain how negative region is obtained in Gunn diode?

(b) Distinguish between Transferred electron devices and Avalanche transit time devices.

4 (a) Discuss the modes of operation for Gunn effect diodes

(b) Explain the principle of working of IMPATT diode with suitable structure andcharacteristics.

SECTION - III

(a) Prove that impossibility of perfect matching in any three port microwave network.

(b) Outline the working of rotary vane phase shifter with neat diagram.

(a) Develop the relation between cutoff, guided and free space wavelengths fromdispersion equation in a waveguide

(b) A rectangular waveguide has a=4cm, b=3cm as its sectional dimensions. Concludeall the modes which will propagate at 500MHz.

5

6

SECTION - IV

(a) Discuss the measurement of frequency using neat block diagram.

(b) What are the different precautions have to be made while measuring parameters atmicrowave range?

7

8 (a) What is bolometer? How it is used for microwave measurements.

(b) Describe the procedure to calculate the Q-factor of rectangular cavity resonator

SECTION - V

(a) Describe the different types of horn antennas.(b) A parabolic reflector of 1.8m diameter is used at 6GHz. Calculate beam width

between first nulls and gain in dB

9

Summarize the characteristics of strip line and micro strip lines10

Code : 13EE3210R-13


ELECTRONIC MEASUREMENTS(Electrical & Electronics Engineering )



•k k *

SECTION - I(a) Draw the block diagram of the horizontal amplifier of an oscilloscope and explain.

(b) Explain the functioning of time base generator in C.R.O.1

Discuss working of Cathode Ray tube and applications of CRO.2

SECTION - II

(a) Explain the operation of dual slope type digital voltmeter with neat diagram.

(b) State the advantages of digital voltmeters over other voltmeters.3

Explain the following terms as applied to digital displaysi) Resolution ii) Sensitivity iii) Accuracy specifications

4

SECTION - III

Explain different methods used for measurement of unknown components usingQ- meter.

5

(a) What are the differences between frequency selective and heterodyne waveanalyzers.

(b) Describe in detail principle and operation of Vector impedance meter?

6

SECTION - IV

(a) Explain the working of a oscillation transducer in the measurement of pressure.

(b) A strain gauge of nominal resistance 200Q is fixed on one flat surface of a shortcolumn of 2cm X 2cm cross sectional area. The column is subjected to an axialforce of 100N. The strain gauge forms one arm of a bridge with other arms allequal to 200Q. Find open circuit voltage of the bridge excited by lOv. GivenYoung’s modulus of elastic is 2.1x101lN/m2.

7

(a) Explain the construction and working of LVDT accelerometer with a neat sketch.

(b) What are the advantages and disadvantages of LVDT.8

SECTION - V

Write the short notes on the following:a) Electromagnetic flow meter.b) Inductive method of liquid level measurement.c) Thermocouples.

9

With a neat block diagram, Explain the components of analog DAS.10

R-13 Code :13ME3202B.TECH. DEGREE SUPPLEMENTARY EXAMINATION, OCTOBER 2020

III B.Tech. II SemesterHEAT TRANSFER

(Mechanical Engineering)Time : 3 hours Max. Marks :60


* * *

SECTION - I

(a) Asbestos layer of 5mm thickness (k=0.115W/mK) is used as insulation material overa boiler wall. Consider an area of 1.0m and find out the rate of heat flow as well as

1

the heat flux over this area if the temperatures on either side of the insulation are400°C and 40°C.

(b) List out the modes of Heat transfer and define them with a suitable example.

(a) Derive the three-dimensional general heat conduction equation in CartesianCoordinate, and deduce the Laplace equation from it.

(b) Define Thermal conductivity and Thermal Diffusivity.

2

SECTION - II

(a) An aluminum sphere weighing 5.5kg and initially at a temperature of 290°C issuddenly immersed in a fluid at 15°C. The convective heat transfer coefficient in 59W/m2k. Estimate the time required to cool the aluminum to 95°C.

(b) State Biot number and Fourier number. What is its significance?

(a) A long carbon steel rod length 40 cm and diameter 10 mm (K = 40 W/mK) is placedin such that one of its end is at 400°Cand the ambient temperature is 30°C. The filmcoefficient is 10 W/m K. Determine: (i) Temperature at mid length of the fin. (ii) Finefficiency, (iii) Heat transfer rate form the fin.

(b) What is meant by a fin? List out various types of fins.

3

4

SECTION - III

(a) Describe Buckingham’s method of 7i-terms to formulate a dimensionallyhomogenous equation.

(b) A vertical pipe 80 mm diameter and 2 m height is maintained at a constanttemperature of 120°C. The pipe is surrounded by still atmospheric air at 30°C . Findheat loss by natural convection.

5

(a) List out the dimensionless numbers used in free convection situation and theirmathematical expressions.

(b) Air at 27°C and 1 atm flows over a flat plate at a speed of 2m/s. calculate theboundary layer thickness at a distance of 20cm and 40 cm from the leading edge ofthe plate.

6

' >’

SECTION - IV

(a) Two large parallel planes with emissivities of 0.3 and 0.5 are maintained attemperatures of 527° C and 127°C respectively. A radiation shield having emissivityof 0.05 on both sides is placed between them. Calculate (i) Heat transfer rate betweenthem without shield, (ii) Heat transfer rate between them with shield.

(b) Briefly discuss the importance of Radiation shields.

7

(a) Two concentric spheres of diameters dl = 0.8 m and d2 = 1.2 m have surfacetemperatures T1 = 450 K and T2 = 300 K respectively. If the surface emissivities are0.5 and 0.05 respectively, determine the net radiation heat exchange between the twospheres.

(b) The filament of a 75 W light bulb may be considered as a black body radiating into ablack enclosure at 70° C. the filament diameter is 0.10 mm and length is 5 cm.Considering the radiation, determine the filament temperature .

8

SECTION - V

(a) Water flows at the rate of 60 kg/min through a double pipe counter flow heatexchanger. Water is heated from 50°C to75°C by oil flowing through the tube. Thespecific heat of the oil is 1.7kj/kg.K. The oil enters at 120°C and leaves at 70°C.Theoverall heat transfer co-efficient is 340 W/m K.Calculate the following (i) Heatexchanger area, (ii) Rate of heat transfer.

(b) What is the use of LMTD & Effectiveness-NTU method in heat exchangers?

9

10 (a) Water at atmospheric pressure is to be boiled in polished copper pan. The diameter ofthe pan is 380 mm and is kept at 115°C. Calculate the following: (i) Power requiredto boil the water, (ii) Rate of evaporation.

(b) Describe in detail the process of pool boiling curve with a neat sketch.

R-13

Code : 13CE3202


III B.Tech. II Semester

HYDROLOGY(Civil Engineering)

Time : 3 hours Max. Marks: 60


* * *

SECTION - I

(a) Define Hydrology and list out the applications of hydrology in engineering.

(b) The shape of a catchment approximately resembles a square of side 8 km. Withreference to an x-y coordinate frame whose origin is coinciding with one of thecomers of the catchment the locations of the four comers of the catchment are (0,0),(8,0),(8,8) and (0,8). These are four raingauges A, B, C and D within this catchmentwhose positions with reference to the same coordinate frame are (2,2), (6,2), (6,6)and (2,6) respectively. The rainfall recorded by the raingauges A, B, C and D duringa storm are 8, 6, 9 and 11 cm respectively. Determine the average depths of rainfallover the catchment by Arithmetic mean and Thiessen methods.

1

2 (a) Describe the procedure to check the consistency and adjust the rainfall record at asuspicious station by double mass curve technique.

(b) Station X failed to report the rainfall recorded during a storm. With respect to east-west and north-south axes set up at station X, the coordinates of 4 surroundinggauges, which are the nearest to station X in the respective quadrants, are (10,15),(-8,5), (-12,-9) and (5,-15) km respectively. Determine the missing rainfall at X byInverse distance method, if the storm rainfalls at the four surrounding gauges are 73,89, 68 and 57 mm respectively.

SECTION - II

3 (a) Discuss about the factors affecting evaporation.

(b) Illustrate the working of a double ring infiltrometer with adjustable depth offlooding with the help of a neat sketch.

4 (a) Differentiate between 0-index and W-index.

(b) Discuss the relative merits and demerits of sunken, floating and land pans.

SECTION - III

5 (a) Describe briefly how the total precipitation is transformed into the total runoff,

(b) List out the uses of flow duration curve.

6 (a) List out the various physiographic factors which affect runoff. Discuss theirinfluence on the volume of runoff and on the time distribution of runoff.

(b) Explain why rainfall-runoff relationships are needed.

SECTION - IV

7 (a) Describe the step by step procedure of the derivation of a unit hydrograph from anisolated storm

(b) Describe the method of estimating a Tr - year flood using Gumbel's distribution.

(a) Sketch a typical hydrograph resulting from an isolated storm and identify thefeatures of the same.

8

(b) The following are the ordinates of 2-h unit hydrograph. Derive the ordinate of a 6-hour unit hydrograph and plot the same by method of superposition.

8 12 14 16 18 20Time (h) 0 2 4 6 10Ordinates of _2-h UH (m3/s) U 60 40 20 10 015 30 50 80 5

SECTION - V

9 (a) Distinguish between (i) Aquifer and Aquifuge (ii) Confined aquifer and Unconfinedaquifer.

(b) Explain the Muskingum method of routing an inflow hydrograph through a channelreach. Assume the values of the coefficients K and X for the reach are known.

10 (a) Derive an expression for the steady state discharge of well fully penetrating into aconfined aquifer.

(b) In a recuperation test on an open well, the water level was depressed by 4 m and itwas observed to rise by 2.5 m in 90 minutes. Determine the specific capacity of thewell. Determine the yield from the well under a working head of 3 m, if the diameterof the well is 7.5 m. Determine the percentage increase in discharge for the sameworking head if the well diameter is 10 m.

Code : 13EC3201R-13


MICROPROCESSORS & INTERFACING(Common for EEE, ECE, & CSE )

Max. Marks :60Time : 3 hoursAnswer FIVE Questions, Choosing ONE Question from each section

All Questions cany equal marks* * *

SECTION - I

1. (a) Draw the internal architecture of 8085 and explain function each block(b) Compare the Flag registers of 8085 & 80S6

2. (a) Draw the pin diagram of 8085 and explain function of each pin(b) Define instruction cycle, machine cycle and T-state

SECTION - II

3. (a) What are the addressing modes of 8085 ?(b) How interrupts are classified in 8085 and explain ?(c) Writ 8085 ALP for 32 bit addition

With suitable examples explain 8085 instruction set in detail4.

SECTION- III

5. (a) What are the stages of software development ?(b) Draw the architecture of 8086 and explain each block.

6. (a) Write 8086 ALP for sorting of N- 8-bit numbers in ascending order(b) Explain addressing modes of 8086 with suitable examples

SECTION - IV

7. (a) Draw the internal block diagram of 8259 and explain function each block(b) Explain data transfer schemes

8 (a) Draw the internal block diagram of 8251 and explain function each block(b) What are the DMA schemes and explain.

SECTION - V

Draw the interfacing diagram of stepper motor with 8086 and write an ALPto rotate the shaft of a Four Phase stepper motor, in clock wise 5 rotationsand in anti clock wise 5 rotations.

10 (a) Explain the 8255 operation modes .(b) Draw the interfacing diagram of DAC with 8086 and write an ATP to

generate a saw tooth wave form.

9.

R-13 Code : 13ME320IB.TECH. DEGREE SUPPLEMENTARY EXAMINATION, OCTOBER 2020

III B.Tech. II SemesterDYNAMICS OF MACHINERY


Answer FIVE Questions, Choosing ONE Questionfrom each sectionAll Questions carry equal marks

* * *

SECTION - I

(a) The thrust of a propeller shaft in a marine engine is taken up by a number of collarswhich are integral with the shaft of 300 mm in diameter. The thrust on the shaft is200kN and speed is 75 rpm. Taking p is constant and equal to 0.05 and assuming theintensity of pressure as uniform and equal to 0.3 N/mm2, find the external diameter ofthe collars and the number of collars required, if the power lost in friction is not toexceed of 16 kW.

1

(b) A square threaded screw of mean diameter 25 mm and pitch of thread 6 mm isutilized to lift a weight of 10 kN by horizontal force applied at the circumference ofthe screw. Find the magnitude of the force if the coefficient of friction between thenut and screw is 0.02.

(a) A multiple disc clutch has three discs on the driving shaft and two on the drivenshaft, providing four pairs of contact surfaces. The outer diameter of the contactsurface is 250mm and the inner diameter is 150 mm. Determine the maximum axialintensity of pressure between the discs for transmitting 18.75 kW at 500 rpm.Assume uniform wear and coefficient friction as 0.3.

2

(b) A centrifugal clutch, transmitting 20 kW at 750 rpm consists of. four shoes. Theclutch is to be engaged at 500 rpm. The inner radius of the drum is 165 mm. Theradius of the centre of gravity of the shoes is 140 mm, when the clutch is engaged.The coefficient of friction is 0.3, while the permissible pressure on friction lining is0.1 N/mm2. Calculate:i) The mass of each shoeii) The dimensions of friction lining

SECTION - II(a) Distinguish between brake and dynamometers.3

(b) A brand brake of drum diameter 400mm proves a braking toque of 2kN-m. One endof the band is attached to a pin 100 mm from the fulcrum of the lever and the otherend to another pin 20 mm from the fulcrum and on the other sides of it whereoperating force is also acting. The angle of lap on the drum is 225° and thecoefficient of friction is 0.3. Find the operating force required at the end of the lever600 mm long for the two directions of rotation of the drum.

(a) Discuss the various types of brakes.4

(b) Describe with the help of neat sketch the principle of operation of an internalexpanding shoe brake. Derive the expression for the breaking torque.

SECTION - III

(a) Write a short note on “Coefficient of insensitiveness“ of governors5

(b) The arms of a proell governor are 27.5 cm long and are pivoted on the axis ofrotation. The extension of lower arm on which ball is carried is 10 cm long and themass of each ball is 5 kg, the central mass on the sleeve is 75 kg. If the ball centersare vertical above the pin joint connecting the upper and lower arms when the radiusof rotation is 17.75 cm. Determine the corresponding equilibrium speed.

Explain the term height of the governor. Derive an expression for the height in thecase of Watt governor. What are the limitations of the Watt governor?

6

SECTION - IV

The areas above and below the mean torque line taken in order are 5.5, 3.3,3.8, 4.9, 1.8, 3.6, 3.5, and 2.8 cm2. The turning moment diagram for theengine dawn to the following scale.Turning moment : 1 cm =T0000N-mCrank angle : lcm= 60°The speed is 150 rpm and total fluctuation of speed must not exceed 3.5%of mean speed. Determine the diameter and weight of the flywheel. Theperipheral velocity of the flywheel is 15m/s. Find also the cross-sectionalarea of the rim of the flywheel.

7

Define the terms ‘coefficient of fluctuation of speed’ and ‘coefficient offluctuation of energy’.A machine punching 3.8cm diameter holes in 3.2cm thick plate does 600Nmwork per cm2 shear area. The punch has a stroke of 10.2 cm and punches 6holes/min. The maximum speed of the flywheel at its radius of gyration is27.5 m/s. Find the weight of the flywheel, so that the speed at the sameradius does not fall below 245 ml, also the power of the driving motor.

8 (a)

(b)

SECTION - V

Explain the application of gyroscopic principle to air craft.9 (a)

The turbine rotor of a ship has mass of 22 tonnes and rotates at 1800 rpmclockwise when viewed form aft. The radius of gyration of rotor is 320 mm.Determine the gyroscopic couple and its effect when(i) The ship turns right at a radius of 250m with a speed of 25km/hr(ii) The ship pitches with the bow rising at an angular velocity of 0.8

rad/sec(iii)The ship rolls at an angular velocity of 0.1 rad/sec.

(b)

Each wheel of a four wheeled rear engine automobile has a moment ofinertia of 2.4 kg-m2 and an effective diameter of 600mm. The rotating parts

r\

of the engine have a moment of inertia of 1.2 kg-m . The gear ratio ofengine to the back wheel is 3 to 1. The engine axis is parallel to the rearaxle and the crank shaft rotates in the same sense as the road wheels. Themass of the vehicle is 2200 kg and the centre of mass is 550 mm above theroad level. The track width of the vehicle is 1.5m. Determine the limitingspeed of the vehicle around the curve with 80mm in radius, so that all thefour wheels maintain contact with the road surface.

10

Code: 13CE3201R-13


III B.TECH. n SEMESTER

RCC STRUCTURAL DESIGN- II(CIVIL ENGINEERING)

Max. Marks: 60Time : 3 hours


SECTION-IDesign a reinforced concrete combined rectangular slab footing for two

columns located at 4.2m apart. The overall sizes of the columns are 300mm

x 300mm and 500mm x 500mm and they are transferring 620 kN and

llOOkN respectively. The centre of the lighter column is 0.4m from the

property line. The safe bearing capacity of the soil is 150kN/m2. Use M25

concrete and Fe4 i5 steel. Sketch the reinforcement details.

1.

Design a combined trapezoidal footing for two columns A and B, spaced 6

metres centre to centre. Column A is 320 x 320 mm in size and transmits a

load of 680 kN. Column B is 420mm x 420mm in size and carries a load of

960kN. The maximum length of footing is restricted to 7 metres only. The

safe bearing capacity of soil may be taken as 180 kN/m2. Use M25 mix for

concrete and Fe4is steel.

2.

SECTION-II

Design a cantilever retaining wall to retain an earth embankment with a

horizontal top 3.2m above ground level. Density of earth is 17 kN/m3, angle

of internal friction <t>=30°, SBC of soil is 190 kN/m2. Take coefficient of

friction between soil and concrete is 0.5. Adopt M20 grade concrete and Fe4i5

steel.Design a counterfort retaining wall if the height of wall above the ground

level is 5.5m, SBC of soil is 180 kN/m2, angle of friction <j>=30° and unit

weight of back fill is 18 kN/m keep spacing of counterforts as 3.2m.

Coefficient of friction between soil and concrete p=0.5. Adopt M20 grade

concrete mix and Fe4i5 steel.

3

4.

SECTION-III

Design a rectangular water tank 5m x 4m with depth of storage 3.2m, restingon ground and whose walls are rigidly joined at vertical and horizontaledges. Assume M2o concrete and Fe4i5 grade steel.

5.

Design an Intze water tank for a capacity of 1.4 million litres, supported onan elevated tower comprising 10 columns. The base of the tank is 18m aboveground level and the depth of the foundation is 1.2 m below ground level.Adopt M2O and Fe4is grade concrete and steel.

6.

SECTION-IVA simply supported circular slab of radius 2.8 m is reinforced with 12 mmbars of 160mm centre to centre in two mutually perpendicular directions.Average effective depth is 100mm and overall depth is 125mm.If concrete ofgrade M2o and steel of grade Fe4 i5 are used, determine how much serviceload it can carry. Take finishing load as 1 kN/m .

7.

8. (a) Distinguish between virtual work method and equilibrium method of findingload carrying capacity of slabs by yield line theory.

(b) Prove that in isotropically reinforced, slab moment across any yield line isthe same

SECTION- V

9 (a) Define a prestressed concrete member. Explain the advantages andapplications of prestressed concrete.

(b) Explain in detail the Gif iord Udal system of prestressing with the help ofneat sketch.A simply supported prestressed concrete beam of rectangular cross-section300mm x 500mm is loaded with a total uniformly distributed load of 250kNover a span of 5m. Sketch the distribution of stresses at the mid-span and endsections if the prestressing force is 1500kN and the tendon is eccentric,located at 150mm above the bottom fibre.

10.

Code: 13CS3203R-13


III B.Tech. II SemesterFREE & OPEN SOURCE SOFTWARE

(Computer Science & Engineering)

Max. Marks: 60Time: 3 hours


•k k *

SECTION - 1

What is Open Source? Explain the significance of open source software and itsapplications in detail.

1

Explain the main legal issues that can arise with free and open source softwarelicensing.

2

SECTION - II

Write about Hierarchical file system of Linux operating system.

Explain in detail about ‘man pages’ in Linux OS.3 a)

b)

List out three modes in Vi Editor. Explain it with an example.

What are redirection operators? Write and explain it with the suitable commands.4 a)

b)

SECTION - III

How will you change the permission of a directory/ File using ‘chmod’ command?Explain with its symbolic approach.

What is the use of pipe command? Explain ‘tee’ command with an example.

5 a)

b)

Explain following commands in detail:1. tar2. Zip & Unzip3. Mount & Unmount4. Cpio5. gzip6. bunzip

6

SECTION - IV

Write the procedure to Create, Rename, Delete and Save a file in Ubuntu OS.Compare it with Windows OS.

7

Explain in detail about Moodle software. Write its significance.8

SECTION - V

Discuss various needs of Open Source projects.9

Describe about RSS Feeds.10

Code: 13ME3204R-13


MECHANICAL MEASUREMENTS & CONTROL(Mechanical Engineering)



* * *

SECTION - 1

a) Define and explain the following terms?I. Amplitude response, ii. Frequency response, iii. phase response

b) Explain generalized measurement system elements with block diagram.

1

a) Explain the following terms with respect to measurement system:ii Drift and Shift iii Different errors.

b) Explain about Analysis of experimental data and types of experimental errors.

2i Span and Range

SECTION - II

3 a) Analyze the features both Ionization and Photoelectric transducers,

b) Differentiate gas pressure and vacuum pressure measurements.

Explain with an example by your own, how Loading of the Signal Source carried ina transducer?

4

SECTION - III

a) With a neat sketch explain the constructional feature and working of (i) IonizationGauge, (ii) Thermocouples

b) Explain the construction of a linear variable differential transformer with neatsketch.

5

How do you measure different of fluid velocities? And what are the devices are usedto measure fluid flows. Explain them.

6

SECTION - IV

Classify what are devices used to measure Vibrations? Explain their workingmechanisms with neat sketches.

7

What are the different strain gauges? Mention different techniques available for themeasurement of strain and explain.

8

SECTION - V

9 Differentiate Open loop, closed loop and automatic control systems. And explainthem with relevant industrial oriented examples.

10 a) What does signal flow graph represent? Define the various terms associated with itb) Explain about working mechanism of Hydraulic Cylinder with neat sketch.

R-13 Code :13EC3204


DIGITAL DESIGN(Electronics & Communication Engineering)



* * *

SECTION - I

(a) Calculate the small-signal voltage gain if Mi is in saturation and ID = 0.5mA for the Common-source stage circuit shown below:(assume (W/L)i = (50/0.5), RD = 2KQ, and Rs = 20012.)

1

T VDD

t'out

«S

(b) For a Differential pair with current sources load shown in the figure calculate the maximumallowable output voltage swing and small signal differential gain if Vjn,cM = 1.5V, assume(W/L)I-4 = 50/0.5 and Iss = 1mA.

VODM 3

^out

V'ln

£>' ss

(a) For the Circuit shown below calculate small-signal deferential voltage gain.2

'"ePlhHP MsI 1 I o° V'out 0—'

B=M 3 -—M—, ,

x h. Yin1° It /Wi ^231— In2

V'b—lk>7

(b) The Modification of cascade mirror low-voltage, operation circuit designed with (W/L)IJ2 =(20/0.5), (W/L)3j4 = (60/0.5) and IREF = lOOpA. Determine Vx and the acceptable range of Vb.

T" VOD -p VDDREFREF

^ outXXv* —

BA

'T3

SECTION - II

3 (a) Describe the specifications of Power supply rails for a CMOS logic family(b) Describe the operation basic Emitter-Coupled Logic (ECL) logic gate.

4 (a) Construct three input NAND gate using CMOS logic and analyze the circuit with the help offunctional table.

(b) Mention the classification digital IC logic families and advantages of them

SECTION - III

5 (a) Illustrate the design flow model of VHDL with the help of front-end and back-end steps,

(b) Develop the structural VHDL program for a full adder circuit.

6 (a) Describe the Package in VHDL program. Outline the syntax and explain the terms in it.(b) Develop a dataflow style VHDL program for detection of prime number of a four input binary

number.

SECTION - IV

(a) Explain the commercially available MSI device IC 74X138 used as 3-to-8 decoder with gatelevel circuit diagram and analyze using truth table

(b) Develop a behavioral-style VHDL program for 8 input priority encoder

7

(a) Construct the circuit 4-to-16 decoder using 74X138(b) Develop a dataflow-style VHDL program for a 4-input, 8-bit multiplexer

8

SECTION - V

9 (a) Model the dataflow-style VHDL program for S-R latch. Explain the operation with help offunctional table.

(b) Describe the circuit that performs parallel-to-serial conversion using shift registers.

10 (a) Develop the behavioral-style VHDL program for a positive-edge triggered D Flip-Flop;explain the operation using functional table.

(b) Outline the various impediments to synchronous Design

Code : 13EE3212R-13

B.TECH. DEGREE SUPPLEMENTARY EXAMINATION, OCTOBER 2020III B.Tech II Semester

POWER SYSTEMS- II(Electrical & Electronics Engineering)

Max Marks: 60Answer FIVE Questions, Choosing ONE Question from each section

All questions carry equal marks

Time : 3 hours

* * *

SECTION - I

(a) Draw the phasor diagram of a medium transmissionT- representation and derive the necessary equations.

(b) An overhead 3- phase transmission line delivers 5000 kW at 22kV at 0.8 powerfactor lagging the resistance and reactance of each conductor is 4 ohms and 6ohms respectively. Determine i) sending end voltage ii) percentage regulation andiii) Transmission efficiency.

line using nominal1.

2. (a) Explain different methods of voltage control and line compensation?

(b) Fine the network constants of a long transmission line 3 phase, 50 Hz and 150 kmlong whose resistance per km is 0.2 W and inductance per km is 1.5 mH andcapacitance per km is 0.008 pF. Neglect the conductance of the line.

SECTION - II

3. (a) Explain with the help of neat diagram the specifications of travelling waves?(b) A 500 kV surge travels on an overhead line of surge impedance 400 W towards

its junction with a cable which has a surge impedance of 40W. Find i) transmittedvoltage and current, ii) reflected voltage and current.

4. (a) Starting from first principles show that surges behave as traveling waves findexpressions for surge impedance and wave velocity.

(b) Write short notes on attenuation and distortion

SECTION - III

(a) Explain different methods of neutral grounding?(b) Write in brief about Arcing grounds and protection against Arcing grounds.

5.

6. (a) Derive the expression for earth resistance of hemispherical electrode.

(b) Write in brief about Anc suppression coil earthing and grounding transformers.

SECTION - IV

(a) What are the different ways of classifying substations and explain?(b) Write in detail about Environmental aspects in EHV and UHV lines

7.

(a) Draw the Key diagram of 66/11KV substation.

(b) Explain the types of DC links of HVDC transmission systems?8.

SECTION - V

9. (a) What is per unit system? Explain the advantages of per unit system.

(b) Draw the single line diagram and impedance diagram of a typical power system.

10. (a) Explain the circuit model representation of two winding &three windingtransformers.

(b) Explain the circuit model representation of round rotor synchronous machine.

Code : 13CE3205R-13


ENVIRONMENTAL ENGINEERING - 1(Civil Engineering)



* * *

SECTION - I

1. (a) Discuss the factors affecting per capita demand?

(b) Explain in detail about hourly demand. Discuss its role in design of water supplyscheme?

Discuss various methods of Population forecasting with model calculations andtheir suitability?

2 .

SECTION - II

3. (a) Write a note on water borne diseases.(b) Discuss the chemical characteristics of water along with their permissible limits.

4. (a) Demonstrate the process of removal of fine impurities when alum is used ascoagulant?

(b) Explain theory and methods of aeration?

SECTION - III

5. (a) Discuss various mechanisms involved in filtration?

(b) What are various forms chlorination? Explain Break Point Chlorination?

Answer the following with reference to Rapid sand filter :(a)-ve loss of head and Air binding(b) Back washing.

6 .

SECTION - IV

7. (a) Write a note on removal of Salinity from water.(b) Describe principle and working of Reverse Osmosis (RO) process, in detail?

8. (a) Explain process of removal of Fluorides from water?

(b) When do you prefer Ion Exchange Process? Explain it ?

SECTION - V

9. (a) Describe the requirements of a good distribution system?(b) List various valves used in distribution system. Describe any one with neat

sketch?

10. (a) What are the methods of analysis of pipe network? Explain Hardy Cross method?(b) Discuss various systems of Plumbing with neat sketches, indicating their meritsand de-merits.

R-13 Code : 13EE3213B.TECH. DEGREE SUPPLEMENTARY EXAMINATION, OCTOBER 2020

III B.Tech. II SemesterPOWER ELECTRONICS

(Electrical & Electronics Engineering)Time : 3 hours Max. Marks :60


* * *

SECTION - I

Explain the static V-I characteristics of a thyristors and different modes of operation.]

Explain in detail the problems associated v/ith the connection of SCRs in series andparallel.

2

SECTION - II

A 1-0 fully controlled converter is connected to a load comprised of M 2 resistanceand 2.3H inductance. The supply voltage is 230Y at 50Hz. Estimate the average loadvoltage, load current and input power factor for a firing angle of 20°. Assumecontinuous and ripple free load current.

3

Draw the circuit diagram of a 3-0 hill converter; explain how the output voltagewave for a firing angle of 30° is obtained by using phase- voltage and line voltages.

4

SECTION - III

Define chopper. Mention one application of different types of choppers.

A step-up chopper with a pulse width of 15(Us operating on 220V DC supply.Compute the load voltage if the blocking period of the device is 40 j«s.

5 (a)(b)

Explain in detail about Jones chopper and oscillating chopper with neat circuitdiagrams.

6

SECTION - IV

Explain about current commutation and voltage commutation techniques used forsingle phase bridge inverter with neat circuits and wave forms.

Compare CSI and VSI.Explain the principle of operation of a 1-0 half bridge inverter with neat sketch.

7

8 (a)(b)

SECTION - V

For a single phase ac voltage controller fed from a single phase source and iscontrolling power to R-load, derive the expressions for rms output voltage, outputcurrent and line power factor.

Discuss the working of a 1 -0 bridge type cycloconverter with R . load . Sketch a neatcircuit diagram and output rms voltage and current wave form for f0 = (10) fs .

9

10

R-13 Code : 13ME3205B.TECH. DEGREE SUPPLEMENTARY EXAMINATION, OCTOBER 2020

III B.Tech. II SemesterPRINCIPLES OF MACHINE DESIGN



* * *

SECTION-Ia) Explain various steps followed in selection of materials for machine element1

b) Explain various stages in machine design in designing of machine component/

2 a) Derive expression for principal stresses

b) ' Determine principal stresses and its planes, If ax = 60 N/mm2, ay = 30 N/mm2 and= 25 N/mm2®xy

SECTION-nA hot rolled steel shaft is subjected to a torsional load that varies from 300 N-mto -100 N-m as an applied bending moment at a critical section varies from +400N-m to - 200 N-M . Determine Required diameter of the shaft. FS=1.75,Ultimate stress= 555 MN/m2 , Yield stress= 400 MN/m2

3 a)

Write short note on the following.

(i). Notch sensitivity (ii). Endurance limit (iii). Goodman’s line

Define stress concentration and explain various methods for reducing stressconcentration

b)

4 a)

A steel rod is subjected to a reversed axial load of 180 kN. Find the diameter ofthe rod for a factor of safety of 2. Neglect column action. The material has anultimate tensile strength of 1070 MPa and yield strength of 910 MPa. Theendurance limit in reversed bending may be assumed to be one-half of theultimate tensile strength. Other correction factors may be taken as follows: Foraxial loading = 0.7; For machined surface = 0.8 ; For size = 0.85 ; For stressconcentration— 1.0.

b)

SECTION-mWhat are the different stresses set up in a bolt due to initial tightening? Explainthese stresses in detail.

5 a)

For supporting the travelling crane in a workshop, the brackets are fixed on steelcolumns as shown in Figure. The maximum load that comes on the bracket is 12kN acting vertically at a distance of 400 mm from the face of the column. Thevertical face of the bracket is secured to a column by four bolts, in two rows (twoin each row) at a distance of 50 mm from the lower edge of the bracket.Determine the size of the bolts if the permissible value of the tensile stress for the

b)

bolt material is 84 MPa. Also find the cross-section of the arm of the bracketwhich is rectangular.

f-*—400 mm

375 mmi

T

J50 mm

6 a) How are eccentrically loaded bolted joints designed

b) A steam engine of effective diameter 30 cm is subjected to a steam pressure of150N/cm2. The cylinder head is connected by 8 bolts having yield point330N/mm2 and endurance limit of 240N/mm2. The bolts are tightened with aninitial pre-load of 1.5 times the steam load. A soft copper gasket is used to makethe joint leak proof. Assuming a factor of safety of 2 find the size of boltrequired. The stiffness factor for copper gasket may be taken as 0.5.

SECTION-IVa) Give classification of welded joints

b) A plate 15cm wide and 2 cm thick is to be welded to another plate by means ofdouble parallel welds. The maximum axial load along the center axis is 50 KN.Determine the length of the weld in each case if the joint is subjected toi) Static load and ii) Variable load. Take tensile stress = 60 N/mm andShear stress = 40 N/mm

7

a) Explain eccentric loading design of welded joints

b) A welded connection of steel plates is shown in Figure. It is subjected to aneccentric force of 80 kN. Determine the size of the weld if the permissible shearstress in the weld is not to exceed 60 N/mm2.

8

SOkN

1oTH

I

SECTION-VDesign a knuckle joint to connect two mild steel rods subjected to an axial load of150 KN. Take Tensile strengths00 N/mm 2 Shear strength=60 N/mm 2

Crushing strength=150 N/mm

9

10 A shaft is supported by two bearings placed 1 m apart. A 600 mm diameter pulleyis mounted at a distance of 300 mm to the right of left hand bearing and this

2.25 kN. Another pulley 400 mm diameter is placed 200 mm to the left of righthand bearing and is driven with the help of electric motor and belt, which isplaced horizontally to the right. The angle of contact for both the pulleys is 180°and p = 0.24. Determine the suitable diameter for a solid shaft, allowing workingstress of 63 MPa in tension and 42 MPa in shear for the material of shaft. Assumethat the torque on one pulley is equal to that on the other pulley.

&»

R-13 Code : 13CS3205


COMPUTER ORGANIZATION(Electronics & Communication Engineering)



* * *

SECTION - I

(a) Demonstrate Arithmetic Logic Shift Unit architecture.

(b) Depict how data Transfer happens between registers and memory

1

(a) Present in detail the role of Timing and control Unit.

(b) List various Register reference and Memory reference instructions with examples

2

SECTION - II

3 (a) Explain the difference between Machine Language and Assembly language,

(b) Explain the concept of Subroutine with example?

(a) Give the organization of typical hardwired control unit and explain the functionsperformed by the various blocks.

(b) Explain about Micro Program Sequencer for control memory.

4

SECTION - III

5 (a) Define Stack and explain about the organization of Stack.(b) Explain about two address and RISC instructions with suitable examples.

(a) Explain the function of a six segment pipeline showing the time it takes toprocess eight tasks.

(b) Explain about instruction Pipeline with suitable illustration

6

SECTION - IV

(a) Distinguish between Isolated versus Memory Mapped I/O(b) Explain about the Daisy chaining Priority with neat diagram.

7

(a) Explain the different types of I/O data Transfer with timing diagram(b) Explain the principle of DMA with a neat Block diagram.

8

SECTION - V

9 (a) What is multiprocessor system? Explain the advantages of Multi processors overUniprocessors

(b) What is a mapping function? What are the ways the cache can be mapped? Explain indetail

10 A two way set associative cache memory uses blocks of four words. The cache canaccommodate a total of 2048 words from the main memory. The main memory sizeis 128 K*32 i) Formulate all pertinent information required to construct the cachememory ii) What is the size of the cache memory

Code : 13CS3204R-13


COMPILER DESIGN(Computer Science & Engineering)


Answer FIVE Questions, Choosing ONE Questionfrom each sectionAll Questions carry equal marks

* * *

SECTION - 1

Write Short notes on compiler and explain the Analysis-Synthesis parts of Compiler1.

2. (a) Discuss in brief about the Role of Lexical analyser in a compiler

(b) Explain in brief about Lexical errors

SECTION - II

3. (a) Explain the general types of Parsers for grammars.

(b) Explain Error Recovery strategies that parse can employee from a syntax error

4. (a) What are the three techniques for constructing LR parsing table?

(b) Define ambiguous grammar? Explain it with an example

SECTION - mExplain constructing Syntax tree for expression with an example5.

6. (a) Write a short note on Static and Dynamic Checking of types along with examples,

(b) Write a short note on type checking and draw the position of type checker?

SECTION - IV

7. (a) Explain Dangling References.

(b) Write short notes on Dynamic scope and its approaches

8. (a) Explain Parameter passing through call by value and call by references withexample

(b) Write short notes on Symbol tables and its importance in compilers.

SECTION - V

9. Explain issues in the design of a code generation and suitable examples may begiven for any two issues.

10. Why code optimisation phase is optional in compiler? Justify your Answer.

R-13 Code : 13CE32E3


TRANSPORTATION PLANNING(Civil Engineering)



k k "k

SECTION - I

1 Explain the system approach to transport planning using a flow chart ,(a) Mention the stages of transport planning process.(b) Highlight various difficulties in transport planning process.

2

SECTION - II

In detail explain home interview survey and road side interview survey.4 (a) Define the study area of the transport facilities.

(b) Define zone .What are the factors considered for dividing area into zones.

3

SECTION - III

What is trip generation? Explain in detail, the various factors governing tripgeneration.

What is trip distribution? Explain growth factor method in trip distribution.

5

6

SECTION - IV

What is traffic assignment? Explain the application of the traffic assignment.7

Define model split. Explain the brief factors affecting model split.8

SECTION - V

(a) Discuss the different evaluation techniques in detail .(b) Describe briefly the concept of Quick Response Techniques

9

What are the difficulties in transport planning for small and medium cities? Suggestsuitable traffic improvement strategies?

10

R-13 Code :13EE32E1


UTILIZATION OF ELECTRIC POWER(Electrical & Electronics Engineering)



* * *

SECTION - 1(a) Discuss laws of illumination and its limitations.(b) The luminous intensity of a source is 800 candela is placed in the middle of a

1 2 m x 8 m x 4 m room. Calculate the illumination,At each comer of the room.At the middle of the 10 m wall.

1

(i)ii)

2 (a) Explain about the Sodium Vapour lamp with neat diagrams.(b) Write the points for the requirements of good lighting and explain flood lightning.

SECTION - II

3 (a) Explain the resistance heating methods with schematic diagrams.(b) Explain induction heating and write applications of induction heating.(a) Discuss the principle of arc welding and the difference between carbon and metal arc

welding and their relative merits and demerits.

(b) Write about various types of equipment used for electric welding.

4

SECTION - III

(a) What are the factors influencing the choice of electric drives.(b) A 230 V, 10 h.P (metric) shunt motor has field and armature resistance as of 150Q ,

respectively. Calculate the resistance to be inserted in the armature circuit to reducethe speed to 600 rpm from 1000 r.p.m, if the full load efficiency is 85% and thetorque varied as the square of the speed.

5

(a) Discuss on different types of loads and write different electric drives and itsapplications.

(b) Briefly explain method of load equivalization.

6

SECTION - IV

(a) What are the advantages and disadvantages of electrification of track and Review thevarious systems of traction work.

(b) What is electric breaking and Explain regenerative breaking.

7

(a) Explain braking methods of plugging and rheostatic breaking.(b) Write the salient features for selection of motors for electric traction.

8

SECTION - V

(a) Explain simplified trapezoidal speed-time curve of main line service of an electrictrain with diagram and derive expression for maximum speed.

(b) A train has schedule speed of 25 Kmph over a level track, distance between stationsbeing 1 km, Station stopping time is 20 secoonds. Assuming braking retardation of3kmphps and maximum speed 25% greater than average speed, calculate accelerationrequired to run the service.

9

10 (a) Explain briefly the tractive effort required, while the train is moving up the gradientand down the gradient.

(b) A locomotive accelerates a 400 tonne train up a gradient of 1 in 100 at 0.8km/hr/sec.Assuming the coefficient of adhesion to be 0.25, determine the minimum adhesiveweight of the locomotive. Assume train resistance 40 newtons/tonne and allow 10%for the effect of rotational inertia.

R-13 Code : 13CE32E2


III B.Tech. II SemesterADVANCED FOUNDATION ENGINEERING

(Civil Engineering)Time : 3 hours Max. Marks :60


k k k

SECTION - I1 (a) What are the considerations for the selection of any type of foundation in buildings?

(b) Determine the size of a square footing at the ground level to transmit a load of 900kN in sand weighing 18 kN/m3 and having an angle of shearing resistance of 35° (Nr= 46, Nq = 42) factor of safety is 3. What will be the modification in the result, if thefooting may be placed at a depth of lm below ground surface? Assume, in this case,the water table may rise to the ground surface, y' = 9 kN/m3.

(a) Discuss the effect of water table on bearing capacity.(b) Determine the allowable load carrying capacity of a circular footing of 3m diameter

installed in medium sand (y=T 8kN/m3, ysat=19kN/m3. < j)= 27°) deposit at a depth of 1.5mbelow ground level if the desirable factor of safety against shear failure in soil is 2.5.The ground water table is at lm below ground level. The local shear bearing capacityfactors for ())= 27° are Nc = 15.3s, Nq = 5.8 andNr = 3.5.

2.

SECTION - II(a) List out different types of foundations. State the circumstances to go for combined

foundations.3

(b) Design a rectangular combined footing by the conventional methodSizeWorking LoadsColumn

No. mmLL(KN)DL(KN)

300 x 3002702701

300 x 3004004902

Centre to centre distance between columns is 4.50 m. The allowable bearingpressure of the soil is 100 kPa. Find the footing dimensions.

4. (a) Explain the procedure for proportioning a combined trapezoidal footing. Under whatcircumstances is such a footing preferred.

SECTION - III(a) Describe various types of mat foundations with neat sketches.5.

(b) Explain the design procedure for Mat foundation?

6 . (a) What is a floating raft? What is its principle of design? How is it different from aconventional raft?

(b) A raft 12 m x 18 m is placed at a depth of 4 m on a clay soil with the followingproperties: cu = 70 kN/m2; cpu = 0 and y - 18 kN/m2. Determine the factor of safetyavailable against shear failure, if the raft, the structure and the live loads that it willcarry are expected to exert a pressure of 180 kN/m'. There is a provision forbasement floor. Use Skempton’s equation.

SECTION - IV(a) A pile group of 9 piles 40cm diameter, 120cm centre to centre both ways

(symmetrically placed) is driven to a depth of 12m through clay of unconfmedcompressive strength of 100 kN/m and density of 20 kN/m . Assuming adhesionfactor of 0.5, calculate the load that the group can carry with a factor of safety of 3.0.

7.

[6M](b) What is meant by the efficiency of a group of piles? How is the safe load of a group

of piles based on individual pile failure and block shear failure criteria determined?

8. (a) A 16-pile group has to be arranged in the fonn of a square in soft clay with uniform spacing.It is proposed to Transfer the total load of 3000 kN. of a structure through 10 m longbored plies in a deep deposit of clay having an average undrained shear strength of 90kN/m2. The design diameter of the pile is 400 mm. Estimate the number of pilesrequired, considering a factor of safety of 2.5. Also, suggest the arrangement of piles.Calculate efficiency of the suggested group arrangement. .

(b) A 25-pile square group (5x5) has to be proportioned in an uniform pattern in claywith equal spacing in all directions. Taking adhesion factor = m= 0.7. Determine theoptimum c/c spacing of the piles in the group. Neglect end bearing effect of thegroup. Each pile is square in c/s with side of ‘a’ units. [6M]

SECTION - V9. (a) Distinguish between immediate (elastic) and consolidation settlements.

(b) Briefly explain the steps to be followed to estimate the settlement of the pile groupsin clay.

10. (a) A rectangular footing 3 m x 2 m exerts a pressure of 150 kN/m2 on a cohesive soilhaving E= 5x 104 kN/m2, Poisson’s ratio = 0.50). Determine the immediate settlementat the centre of the footing assuming the footing as flexible and rigid with influencefactors 1.36 and 1.06 respectively. .

(b) Discuss the settlement of pile groups resting on sands and clays.

Code: 13EC32E1B.TECH. DEGREE SUPPLEMENTARY EXAMINATION, OCTOBER 2020

III B.Tech. II SemesterNEURAL NETWORKS & FUZZY LOGIC(Electronics & Communication Engineering)

R-13

Time: 3 hours Max. Marks: 60Answer FIVE Questions, Choosing ONE Question from each section

All Questions carry equal marks* * *

SECTION - I

(a) Give the comparative analysis of biological neural network and artificial neuralnetwork to discuss about their structure, layers, functions, learning, style ofcomputation, processing elements, processing speed, Fault tolerance.(b) Obtain the output of the neuron Y for the network shown in figure using the activationfunctions

1

2 (a) Explain the following networks connections(i) Inter layer connections (ii) Intra layer connections(iii) Recurrent connections

(b) Using Perceptron Learning Rule find the weight vectdrs to train the following inputvectors, initial weight vectors are Xi = [1 -2 0 -1]T, X2 = [0 1.5 -0.5 -1]T , X3 = [-1 1 0.5-1]T and W1 = [1 -1 0 0.5]T and its desired outputs are di= -1, d2= -1 and d3= 1respectively. Assume the activation function to be bipolar sigmoid function andlearning rate coefficient is 0.1

SECTION - II

3 (a) What are the limitations of single layer perceptron network?(b) Explain how a multilayer perceptrons can function as a classifier. Give Examples.

4 (a) Explain the following learning difficulties and improvements in back propagationnetwork.(i) Momentum term

(iii) Addition of internal nodes(b) Implement MADALINE network to simulate the EX-OR function.

(ii) Lowering the gain term(iv) Addition of noise

SECTION - III5 (a) Explain the concept of unsupervised learning. How unsupervised learning is deviatedfrom supervised learning?

(b) Explain the character recognition application with neural network training6 (a) Explain the Winner Take All learning rule and mention its algorithm for training of aneural network

(b) Explain about the counter propagation network.

e*

SECTION - IV

7 (a) The task is to recognize English alphabetical characters (F, E, X, Y, I, T) in an imageprocessing system. Define two fuzzy sets I and F to represent the identification ofcharacters I and F.I = {(F, 0.4), (E, 0.3), (X, 0.1), (Y, 0.1), (I, 0.9), (T, 0.8)}F = {(F, 0.99), (E, 0.8), (X, 0.1), (Y, 0.2), (I, 0.5), (T, 0.5)}Find the followinga. (i) I U F (ii) I n F (iii) FuFcb. (I U F)C = Ic n Fc

(b) Let A = {(xi, 0.2), (X2, 0.7), (X3, 0.4)} and B = {(yi, 0.5), (y2, 0.6)} be two fuzzy setsdefined on the universe of discourse X = {xi, X2, X3} and Y = {yi, y2} respectively.Then find the fuzzy relation R resulting out of the fuzzy Cartesian product A X B andB X A .

(a) Let A = {(X1,0.5),(X2,0.8),(X3,0.9),(X4,1)} and B = {(X1,0.75),(X2,0),(X3,1),(X4,0.25)}are the two fuzzy sets and find the following:

(i) Complement (ii) Union (iii) Intersection(iv) Difference (v) De-Morgon’s principle

(b) Explain the following Fuzzy sets with examples.(i) Equality of two fuzzy sets (ii) Product of a fuzzy set with a crisp number(iii) Power of a fuzzy set (iv) Difference of two fuzzy sets(v) Disjunctive sum

8

SECTION - V

Convert the following three fuzzy sets A1( A2& A3 and aggregation of these fuzzy setsinto crisp sets using the following methods:

(i) Centriod method (ii) Centre of sums method(iii) Mean of maxima method

9

t/ 1 ^2AiJA IA

0.5 -0.5 -

/i0 0

0 1 2 3 4 5 6 0 1 2 3 4 5 6

1

A3 JAiA 1 ' A

/ // 0 . 5 - /0 . 5 * • /

/0U5 1.3*0 1 2 3 4 5 6'

0 f +0 1 2 3 4 5 6

Aggregation of A, , A2 & A3

10 Let X = {a, b, c ,d}, Y={1, 2, 3, 4} andA = {( a,0), ( b,0.8), (c, 0.6)(d,1)}B = {(1,0.2), (2,1), (3,0.8)(4,0)}C = {(1,0), (2,0.4), (3,1)(4,0.8)}Determine the imnlication relations

R-13Code: 13ME32E1


COMPOSITE MATERIALS(Mechanical Engineering)



* *

SECTION - I

What meant a composite materials? Compare and contrast properties among metals,alloys and composites. And also mention the applications of composites over themetals and steels.

1

How do you classify the composite materials? And also mention reasons forclassification. List out broadly classification of composite materials.

2

SECTION - II

Explain manufacturing processes of different glass fibers with suitable diagrams.And also write its properties and applications.

3

Explain different methods of glass fiber manufacturing with neat sketches. And alsowrite its properties and applications.

4

SECTION - III

5 (a) What are the basic requirements in Selection of constituents for different compositematerials?

(b) Describe solidification processing of composites with neat diagram.

Elaborately explain about different Dispersion Processes of composites with neatsketches.

6

SECTION - IV

(a) Discuss about Controlling of particles in composites fibers with neat sketches.(b) What are issues in Liquid phase method and Hot pressing? Explain them in detail.

7

Describe different characterization test methods for unit directional lamina with neatsketches.

8

SECTION - V

9 (a) Discuss what are the composites are used in Civil constructions of structures/panels?(b) What are the applications of various composites in civil aviation industry?

10 (a) What are the commercial forms of fibers?(b) Describe the significance and objectives of composites Science and Technology.

Code : 13CS32E1R-13


MOBILE COMPUTING(Computer Science & Engineering )



* * *

SECTION - I

Give a simple reference model for mobile communications. Explain applications ofmobile computing. Explain how it handles enterprise problems.

1

Explain i) TDMA ii) CDMA2

SECTION - II

Explain the security services of GSM.3

What is localization in GSM?Explain the Handover concept in GSM.

4 (a)

(b)

SECTION - III

Describe the process of optimization in mobile IP with a suitable timeline,

diagram5

Explain Dynamic Host Configuration Protocol.6

SECTION - IV

Explain all the enhancements made to classical TCP to make it suitable formobility.

7

What is Selective re-transmission.Explain Transaction-oriented TCP.

8 (a)

(b)

SECTION - V

Explain in detail about Wireless transaction protocol.

Explain PUSH architecture and PUSH services.

9

10

R-13 Code : 13CE3204

B.TECH. DEGREE SUPPLEMENTARY EXAMINATION, OCTOBER 2020III B.Tech. II SemesterCONCRETE TECHNOLOGY

(Civil Engineering)Time : 3 hours Max. Marks :60


* *

SECTION - I

(a) Write down the physical properties of(i) Rapid hardening portland cement(ii) Expansive cement

(b) What are the functions and applications of various Accelerators ?

1

2 (a) Write down the physical properties of(i) Low heat portland cement(ii) Coloured portland cement

(b) What are the functions and applications of Water proofers ?

SECTION - II

How do you conduct the following tests on aggregates ?(i) Aggregate Impact Test(ii) Flakiness & Elongation Index

3

4 (a) What are the factors affecting the workability ?(b) How do you measure the workability of concrete using Slump test ?

SECTION - III

5 (a) What is Maturity concept of concrete ?(b) The strength of a sample of fully matured concrete is found to be 30 MPa. Find the

strength of identical concrete at the age of 7 days when cured at an averagetemperature during day time at 25° c, and night time at 10° c.

Explain in detail, how do you conduct the non-destructive testing of concrete usingRebound Hammer test with neat sketches. What are its limitations ?

6

SECTION - IV

(a) How do you determine the Dynamic modulus of concrete ?

(b) Define Creep of concrete. What are the factors that affect the creep of concrete ?7

What is Air entrained concrete ? How do you determine the Thermal properties ofconcrete ?

8

SECTION - V

Design a concrete mix for construction of an elevated water tank using ACI methodfor the following data.The specified design strength of concrete is 20 MPa at 28 days measured on standardcylinders. Standard deviation can be taken as 4 MPa. The specific gravity of FA andCA are 2.65 and 2.70 respectively. The dry rodded bulk density of CA is 1500 kg/m3

and fineness modulus of FA is 2.80. Ordinary Portland Cement (Type I) will be used.A slump of 50 mm is necessary. CA is found to be absorptive to the extent of 1 %and free surface moisture in sand is found to be 2 %. Assume any other essential datasuitably.

9

Using Indian Standard recommended guidelines, design a concrete mix for a RCstructure to be subjected to mild exposure conditions during its service life for thefollowing requirements.

10

Characteristic strength at 28 days

Maximum nominal size of the aggregate

Type of the aggregateDegree of workability

Degree of quality control

25 Mpa

20 mm

: Angular (crushed) granite

: Medium (0.9 CF or 75-100mm slump)

: Weigh batching, Occasional supervision

and Tests. S = 5 Mpa.

: Natural river sand conforming to grading

zone IFine aggregate

Type and grade of cement

Specific gravity of cement

Bulk density of cement

OPC, Grade -43

3.15

: 1460 kg/m3

Fine aggregate Coarse aggregate

2.65Specific gravity

Bulk density in kg/m3

Free surface moisture in percent

Fineness modulus

2.60

1710 1810

2 12.2 6.2

CRYPTOGRAPHY&NETWORKSECURITY (ComputerScience & …

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