VARDHAMAN COLLEGE OF ENGINEERING · 9. a) With diagram explain conical scan tracking radar. 7M b)...

Hall Ticket No: Question Paper Code: A2442

VARDHAMAN COLLEGE OF ENGINEERING (AUTONOMOUS)

IV B. Tech II Semester Supplementary Examinations, November - 2019

(Regulations: VCE-R14)

SATELLITE AND RADAR COMMUNICATIONS (Electronics and Communication Engineering)

Date: 08 November, 2019 AN Time: 3 hours Max Marks: 75

Answer ONE question from each Unit All Questions Carry Equal Marks

Unit – I

1. a) With a neat sketch explain the six orbital elements to define a satellite orbit. 7M b) The earth rotates once per sidereal day of 23h 56min 4.09sec. Obtain the orbital radius

for a geostationary satellite.

8M

2. a) State Kepler’s three Laws of Planetary motion with the help of appropriate diagrams and give necessary equations.

7M

b) Define Satellite attitude Briefly describe three-axis method of Satellite Stabilization.

8M

Unit – II

3. a) With diagram explain different antenna and its patterns used in satellite.

8M

b) A satellite at a distance of 40,000km from a point on the earth's surface radiates a power of 10W from an antenna with a gain of 17dB in the direction of the observer. Find the flux density at the receiving point, and the power received by an antenna at this point with an effective area of 10 m2.

7M

4. a) With diagram explain Direct sequence spread spectrum in CDMA. 8M b) Earth station antenna has a diameter of 30m and has overall efficiency of 68% and is used

to receive a signal at 4150 MHz. At this frequency system noise temperature is 79K. Find G/T of the Earth station. If heavy rain causes system noise temperature to rise to 88K, What is the new G/T value?

7M

Unit – III

5. a) Explain with diagram pulse radar. 8M b) Calculate the maximum range of Radar for the following specifications.

Operating frequency, 𝑓=10𝐺𝐻𝑧, Peak power transmitted by the Radar, 𝑃𝑡=400𝐾𝑊,

Effective aperture of the receiving Antenna, 𝐴𝑒=5 𝑚2, Radar cross section of the target,

𝜎 = 30m2, Power of minimum detectable signal, 𝑆𝑚𝑖𝑛=10-10W.

7M

6. a) Explain major applications of radar. 8M b) Explain with diagram TVRO station direct reception.

7M

Unit – IV

7. a) With a neat block diagram explain the basic operation of CW radar. 7M b) Discuss on cross section fluctuations in radar.

8M

8. a) A radar operates at 10.5 GHz center frequency and transmits 100 Watt peak power. The system has an antenna gain of 8dB, a pulse width of 1μsec and a 10 KHz prf. The radar is capable of only post detection integration:

Find power received by the radar, if the radar observes a target of non-fluctuating 10 sq.meter at a range of 0.5km.

8M

b) Explain triangular wave modulated FW-CW radar system.

7M

Cont…2

::2::

Unit – V

9. a) With diagram explain conical scan tracking radar. 7M b) An MTI Radar operates at a frequency of 6GHz with a pulse repetition frequency of 1𝐾𝐻𝑧.

Find the first, second and third blind speeds of the Radar.

8M

10. a) Prove that double delay line canceler equal to the square of the output of single delay line canceller.

8M

b) With example explain acquisition search patterns. 7M





MANAGEMENT SCIENCE (Common to Computer Science and Engineering, Information Technology,

Electronics and Communication Engineering, Electrical and Electronics Engineering & Civil Engineering)



Unit – I

1. a) Describe the nature and scope of management in improving medium scale industry in India.

8M

b) Briefly explain Fayol’s principle of Management.

7M

2. a) Write short note on: i. Matrix Organization ii. Committee Organization

8M

b) Highlight the importance of Departmentation and Decentralization.

7M

Unit – II

3. Briefly explain Job, Batch and Mass production with example.

15M

4. a) Highlight the factors to be considered for plant location. 6M

b) Define Work study? Explain the steps involved in work study.

9M

Unit – III

5. a) What is the need for Materials Management? State its objectives. 7M

b) A gear hobbing machine produces a large number of spur gears. Samples of 300 gears

are inspected every day. The result of the inspection for 25 days is given in table below.

Use this data to construct a p chart for control in the future.

Day No. of gears

inspected

No. of

defectives

Day No. of gears

inspected

No. of

defectives

1 300 12 13 300 3

2 300 3 14 300 0

3 300 9 15 300 5

4 300 4 16 300 7

5 300 0 17 300 8

6 300 6 18 300 16

7 300 1 19 300 2

8 300 8 20 300 5

9 300 11 21 300 6

10 300 2 22 300 0

11 300 10 23 300 3

12 300 9 24 300 2

25 300 2

8M

Cont…2

::2::

6. a) Define ABC analysis and explain how to do an ABC analysis. 7M

b) ABC Ltd. uses EOQ logic to determine the order quantity for its various components and is planning its orders. The Annual consumption is 80,000 units, Cost to place one order is Rs.1,200, Cost per unit is Rs.50 and carrying cost is 6% of Unit cost. Find EOQ and number of order per year.

8M

Unit – IV

7. Explain the following HRM processes: i. Planning ii. Recruitment iii. Selection

15M

8. a) What are the challenges faced by training and development in software industries? 5M

b) List and explain the performance appraisal techniques used in HRM.

10M

Unit – V

9. a) What do you mean by crashing? Discuss the various steps in project crashing. 8M

b) Construct a network for a project whose activities and their predecessor relationship are given in Table.

Activity A B C D E F G H I J K

Predecessor - - - A B B C D E H, I F, G

7M

10. The following table lists the jobs of a network along with their time estimates.

Activity to tm tp

1-4 3 9 27

1-3 3 6 15

1-2 6 12 30

4-5 1 4 07

3-5 3 9 27

3-6 2 5 08

5-6 6 12 30

2-6 4 19 28

i. Draw the project network ii. Determine its critical path

15M



IV B. Tech II Semester Supplementary Examinations, November - 2019 (Regulations: VCE-R15)

REFRIGERATION AND AIR CONDITIONING

(Mechanical Engineering)



Unit – I

1. a) Contrast between refrigerator and heat pump. 7M

b) A Carnot refrigerator is working temperatures of -30˚C and 35˚C. If it operates with R-12 as working substance. Calculate the work of isentropic Compression, Refrigerating effect, heat rejected per kg of the refrigerant, and COP of the cycle.

8M

2. a) Derive the COP of reversed Brayton cycle with the help of T-s diagram. 7M

b) An ideal air refrigeration cycle was designed according to the following specification, pressure of air at compressor inlet is 103.42kpa, pressure of air at expansion valve inlet is 413.7 kpa, temperature at compressor inlet is -7˚C and at expansion valve inlet is 27˚C. Determine C.O.P. of cycle and power required to produce 1 ton of refrigeration.

8M

Unit – II

3. a) Describe the following process with the help of T-s diagram in vapour compression refrigeration: i. Superheating at the compressor inlet ii. Subcooling at the expansion valve inlet

7M

b) Vapour compression refrigerator works between the pressures 4.93 bar and 1.86 bar. The vapour is superheated at the end of compression, its temperature being 250C. The liquid is cooled to 90C before throttling. The vapour is 95% dry before compression. Using the data given below, calculate the COP and refrigerating effect per kg of the working substance circulated.

Saturated temperature

in ºC

Pressure in bar

Total heat

(kJ/kg)

Latent heat

(kJ/kg)

-15 1.86 21.67 161.41

14.45 4.93 49.07 147.8

8M

4. a) Explain the functions of components used in vapour absorption refrigeration system. 7M

b) Explain the two shell lithium bromide vapour absorption refrigeration with neat sketch.

8M

Unit – III

5. a) List and explain thermodynamic properties of an ideal refrigerant. 8M

b) Compare Thermo electric with Vapour compression refrigeration system.

7M

6. a) Name the following refrigerant: i. C2Cl2F4 ii. CCl3F3 iii. CCl2F2 iv. CHClF2

8M

b) Brief the operation of Vortex tube Refrigeration with a neat sketch.

7M

Cont…2

:: 2 ::

Unit – IV

7. a) Explain the need of ventilation for Air conditioning systems. 7M

b) Mention the difference between SHF and GSHF.

8M

8. a) Explain the following relative humidity, specific humidity, wet bulb and Dry bulb temperature.

8M

b) A stream of moist air at 2˚C dry bulb and 80% relative humidity mixes with another stream of moist air at 30˚C Dry bulb and 10˚C dew point in the ratio by mass of one part of first and two parts of the second. Calculate the temperature and specific humidity of the air after mixing.

7M

Unit – V

9. a) Sketch and explain Central air conditioning system. 8M

b) What is effective temperature explain and state its use?

7M

10. a) Sketch and explain any one type of heat pump circuits. 8M

b) Explain different types of blowers in air conditioning system. 7M




NATIONAL SERVICE SCHEME

(Common to Computer Science and Engineering & Electrical and Electronics Engineering)



Unit – I

1. a) Explain the History and Philosophy of NSS. 8M b) Discuss the objectives of NSS. 7M 2. a) Write NSS song. 5M b) Interpret the administrative structure of the NSS.

10M

Unit – II

3. a) Demonstrate the expenditure pattern of the regular and special camp. 10M

b) Demonstrate the maintenance of the diary for NSS activities. 5M

4. a) Write the methodology of conducting Survey and its purpose. 8M

b) List the youth programs other than NSS or schemes of Government of India and explain any one.

7M

Unit – III

5. a) Discuss the role of the youth in NSS activities and its impact. 9M b) Identify and explain the issues of the youth. 6M 6. a) Discuss the challenges faced by today’s youth. 9M b) What is meant by social change? How it will concerned with NSS.

6M

Unit – IV

7. a) Briefly explain the Social-Ecological model. 9M b) Briefly explain community mobilization. 6M 8. a) Explain in detail, Youth-Adult partnership and factors affecting this. 9M b) Describe the method of Community-Stakeholders mapping.

6M

Unit – V

9. a) What is the need and importance of volunteerism? 10M b) List out the constraints that effect the volunteerism. 5M 10. a) Write a note on awareness and motivation of village groups towards Swachhbharat

mission. 10M

b) Write a note on Motivation of volunteerism. 5M




DISASTER MANAGEMENT (Information Technology)



Unit - I 1. a) Explain different approaches for disasters with human ecology. 10M b) Explain environmental hazards and its impacts on human health.

5M

2. a) Outline the ecosystem approach to disaster risk reduction. 5M b) Explain the types of disasters and Discuss the role and responsibilities of disaster

management authorities.

10M

Unit – II 3. a) Classify the natural hazards in detail with suitable examples. 10M b) Illustrate the harmful effects of earthquake.

5M

4. a) Define extra planetary hazards. Discuss impacts of meteorite falls. 10M b) Write a note on Global warming.

5M

Unit – III 5. a) What causes a volcanic eruption? How are volcanoes formed? Explain the different types

of Volcano. 10M

b) Write a note on Earthquake hazards in India.

5M

6. a) Discuss the effects of earthquakes on the environment. 8M b) What are landslides and how do they occur?

7M

Unit – IV 7. a) How lightning takes place during thunder storm? List out different lightning safety

measures. 7M

b) Mention causes of drought and the mitigation measures.

8M

8. a) What are toxic chemicals and describe a few measures that can be taken to reduce the impact of such events.

7M

b) Define flooding? Explain the societal impacts of flooding.

8M

Unit – V 9. a) Explain the terms prevention and preparedness activities in pre-disaster stage. 7M b) Enlist the various institutions and national centers involved in natural disaster reduction.

8M

10. a) Explain the terms response and recovery activities in post-disaster stage. 7M b) Write a note on disaster risk management. 8M





SOFTWARE TESTING AND QUALITY ASSURANCE (Computer Science and Engineering)



Unit – I

1. a) What is software Testing? Discuss the Model for Testing. 8M b) Explain path instrumentation techniques and Discuss the branch testing (P2) criteria for

path testing.

7M

2. a) Define goals for the software Testing. Discuss the terms productivity and quality in software testing.

8M

b) Define and list the Taxonomy for Bugs.

7M

Unit – II

3. a) Explain inspections, reviews, and walkthroughs with respect to transaction flow testing techniques.

10M

b) Explain equality and inequality predicates with respect to domain testing.

5M

4. a) Explain the following with respect to domains and interface testing: i. Closure compatibility ii. Span compatibility iii. Interface range/ domain compatibility testing

8M

b) What are the modeling rules of the data flow model?

7M

Unit – III

5. a) What is decision table? Explain with an example of Decision table. 8M b) Define the terms Path predicate, Path expression, Loop and Path sum.

7M

6. a) With suitable example explain the role of KV-charts in logic based testing. 8M b) Explain in details of Test Case Design and its importance.

7M

Unit – IV

7. a) What are the principles of state testing? Write the Limitations of State testing. 8M b) With suitable example, explain matrix powers and products.

7M

8. a) Write the Algorithm for node reduction in graph matrix. 8M b) Explain in details of Cyclomatic complexity and connection matrix.

7M

Unit – V

9. a) What is Automation testing? Write the need for Automation Testing tools. 8M b) Write the difference between QTP and Selenium Tools.

7M

10. a) Why Automation Testing plays bigger role than manual testing? List and explain some automation tools.

10M

b) Discuss the recording modes in Quick Test Professional (QTP) Tool. 5M




OPERATING SYSTEM FUNDAMENTALS

(Electronics and Communication Engineering)



Unit – I

1. a) What is operating system? Explain the goals of an operating system. 7M b) Give six major categories of types of system calls with examples for Windows and Unix

operating system. 8M

2. a) List the five major activities of an operating system with regard to process management. 5M b) Provide a view of an Operating system services with a neat diagram and explain.

10M

Unit – II

3. a) Describe five state process models with a neat diagram. 8M b) Draw Gantt chart for SJF algorithm. Calculate average waiting time and average

turnaround time.

Process Arrival time in ms Processing time in ms

P1 8 3

P2 2 1

P3 1 3

P4 3 2

P5 4 4

7M

4. a) Explain process control block with its architecture and details of the information it has to keep track of.

10M

b) Explain dining philosopher’s problem.

5M

Unit – III

5. a) Apply the resource allocation graph to identify the deadlock situation in the operating system with example.

8M

b) Compare the logical address and physical address. 7M 6. a) What is thrashing? Explain how working set model can be used to solve the same. 7M b) Explain the process of recovery from deadlock.

8M

Unit – IV

7. a) Explain the different operations of files in detail. 8M

b) What are the issues associated with the file system? Explain. 7M

8. a) List the advantages and disadvantages of single-level directory. 6M

b) Explain in details about the disk scheduling algorithms.

9M

Unit – V

9. a) Differentiate between worms, viruses and DDoS. 7M b) List and explain the advantages and disadvantages of access matrix. 8M 10. a) Discuss the security measures taken at physical, human, OS and network levels to

protect a system. 7M

b) Explain in details the principles and domain of protection. 8M





WIRELESS COMMUNICATIONS AND NETWORKS (Electronics and Communication Engineering)



Unit – I

1. a) Sketch a neat figure and explain the features and functionality of the cellular telephone systems. Examine how a cellular telephone call is made.

8M

b) Interpret the need and role of Wireless Local Loop (WLL). Explain the various features, advantages and trends of WLL.

7M

2. a) Examine the features and functionality of the Paging systems with a neat figure of the wide area paging systems.

7M

b) Illustrate the Evolution of the Mobile Radio communication with relevant example.

8M

Unit – II

3. a) List and describe the features of CDMA. 7M b) Explain protocols related to packet radio multiple accesses. 8M 4. a) With a neat diagram discuss the hierarchy of x.25 protocol in OSI model. 7M b) With a neat block diagram explain Integrated Services Digital Network (ISDN).

8M

Unit – III

5. a) Explain tunneling process in Mobile IP. 7M b) List the important features of WML. Give an example for WML.

8M

6. a) Sketch a neat figure of the WAP protocol stack and explain the WAP specifications and architecture.

7M

b) What are the most important requirements for wireless LAN’s?

8M

Unit – IV

7. a) Sketch a neat figure and explain the IEEE 802.11 MAC frame format. 8M b) With the help of a neat figure explain the features and functionalities of the IEEE 802.15

protocol architecture.

7M

8. a) Sketch a neat figure and explain the operation phases and ingredients of IEEE 802.11i. 7M b) Illustrate the Bluetooth protocol architecture and its various functionalities with a neat

figure of its stack.

8M

Unit – V

9. a) Explain how short messaging service is achieved in GSM. 7M b) Sketch the packet frame format of WATM and discuss the fields in detail.

8M

10. a) Explain how location management is achieved in GPRS. 8M b) Discuss the different protocol entities of an ATM environment that support wireless

mobility. 7M




DSP PROCESSORS AND ARCHITECTURES (Electronics and Communication Engineering)



Unit – I

1. a) Illustrate the need and working of Decimation and Interpolation in DSP applications with relevant figure and examples.

8M

b) Find the magnitude and phase response of an FIR filter represented by the difference

equation 0 .5 0 .5 1y n x n x n . Plot of magnitude and phase response for the

same.

7M

2. a) Interpret the need and role of Digital filters. Sketch a neat figure and explain the structure of a Digital filter. Compare the salient features of FIR and IIR filters with relevant equations showing their advantages and drawbacks.

8M

b) Explain the functionality of the various blocks in digital signal processing system with relevant figure. Also explain the various applications of DSP system.

7M

Unit – II

3. a) What is the role of a shifter in DSP? Explain the implementation of 4-bit shift right barrel shifter with a diagram.

7M

b) What are the memory addresses of the operands in each of the following cases of indirect addressing modes? In each case, what will be the content of the addreg after the memory access? Assume that the initial contents of the addreg and the offsetreg are 0200h and 0010h, respectively. i. ADD *addreg ii. ADD +*addreg iii. ADD offsetreg+,*addreg iv. ADD *addreg,offsetreg-

8M

4. a) Explain Baugh-Wooley multiplier for signed numbers. Show the multiplication operation for 4x4 signed multiplication

7M

b) A DSP has a circular buffer with the start and the end addresses as 0200h and 020Fh respectively. What would be the new values of the address pointer of the buffer if, in the course of address computation, it gets updated to: i. 0212h ii. 01FCh

8M

Unit – III

5. a) Describe any four data addressing modes of TMS320c54xx processor. 8M b) Explain the functioning of barrel shifter in TMS320C54XX processor. 7M 6. a) With a block diagram explain the indirect addressing mode of TMS320C54XX processor

using dual data memory operand. 8M

b) Write an assembly language program of TMS320C54XX processors to compute the sum of three product terms given by the equation

0 1 1 2 2y n h x n h x n h x n with usual notations. Find y n for

signed 16 bit data samples and 16 bit constants.

7M

Cont…2

:: 2 ::

Unit – IV

7. a) With the help of figure showing the general Butterfly computation structure for DIT FFT, Explain how a Butterfly computation is carried out. Also discuss the need for scaling and explain how scaling is implemented in the butterfly computation by finding out the value for different scaling factors.

7M

b) Briefly discuss the IIR Filters and their implementation. Write and Assembly language Program to show the implementation of an IIR filter on TMS320C54xx processors with relevant comments. (Assume the values for the filter coefficients are b0=0.104, b1=-0.102, b2=0.104, a1= -1 and a2= 0.612.

8M

8. a) i. Draw the figure of basic feedback control system and explain the working of PID controller and its implementation.

ii. Explain the significance of Q-notation in the implementation of DSP processors using suitable examples.

7M

b) Illustrate the 2-point, 4-point and 8-point DFT computations showing the signal flow graphs for their computations.

8M

Unit – V

9. a) Sketch a neat figure of block diagram and explain the Memory Interface for TMS320C54xx processor. Also illustrate the timing sequence for external memory access in TMS320C54xx processor

8M

b) Illustrate the Parallel I/O, Programmed I/O and interrupt I/O interface in TMS320C54xx processor with relevant figure.

7M

10. a) i. What is DMA? Explain how the DMA is configured and its operation on aTMS320C54xx processor.

ii. Design a data memory system with address range 000800h–000FFFh for a C5416 processor, Use 2K x 8 SRAM memory chips.

7M

b) Explain the Synchronous Serial Interface (SSI) between the C54xx processor and a CODEC device. Also show the timing sequence for Transmit and Receive Operations for the SSI.

8M




MICRO ELECTRO MECHANICAL SYSTEMS (Mechanical Engineering)



Unit – I

1. a) Define MEMS. Discuss briefly the evolution of MEMS. 7M b) Discuss briefly the principles of lithography. 8M 2. a) Explain the working principle of piezo electric sensors and strain gauges. 8M b) Briefly explain the concept of inchworm technology.

7M

Unit – II

3. a) Explain briefly the basic concept behind thermo sensors and actuators. 7M b) Discuss the working principle of thermisters. 8M 4. a) Discuss the applications of shape memory alloys. 7M b) Write the working principle of micro spring thermal actuator.

8M

Unit – III

5. a) Describe the process of shear stress measurement using MOEM system. 8M b) Write about optical applications of MEMS devices. 7M 6. a) Describe working of a Light modulator. 8M b) Discuss the principle of a Micro mirror.

7M

Unit – IV

7. a) Describe the construction and working of magnetic actuator. 8M b) What is the influence of feedback on magnetic actuator? Explain with an example. 7M 8. a) Briefly explain the various types of magnetic sensors. 8M b) Discuss briefly about the following:

i. Large force reluctance actuator ii. Magnetic probe based storage device

7M

Unit – V

9. a) What are the applications of micro fluid system? 7M b) Explain briefly the working principle of optoelectro wetting system. 8M 10. a) Discuss briefly RF based communication system. 7M b) Write briefly the concept behind MEMS switches and phase shifter. 8M




POWER SYSTEM TRANSIENTS

(Electrical and Electronics Engineering)



Unit – I

1. a) Define transients. Mention different sources of transients in a power system. 6M b) Discuss the various effects of transients on power systems.

9M

2. a) Discuss the importance of transients in power system planning. 9M b) Explain the different types of transients.

6M

Unit – II

3. a) Develop an expression for transient current in an RL series circuit excited with a sinusoidal voltage Vmsinωt.

8M

b) Explain ferroresonant circuit with relevant representations.

7M

4. a) Explain why the transient occurs due to an unloaded transformer is switched. 8M b) What are the effects of switching of circuit with two natural frequencies?

7M

Unit – III

5. a) List out and explain the causes of over voltages in power system. 6M b) Explain the lumped parameter equivalent circuit for lightning stroke to tower.

9M

6. a) Explain the interaction between lightning and power system. 8M b) As per Simpson’s theory of charge separation, explain the mechanism of lightning

phenomenon.

7M

Unit – IV

7. a) Use Beweley’s lattice diagram to explain how the motion of reflected and transmitted waves can be obtained.

7M

b) Explain the behavior of travelling waves at line terminations.

8M

8. a) Analyze the reflection and refraction of travelling waves. 9M b) Explain the concept of travelling wave.

6M

Unit – V

9. a) Arrive at the expression of reflection and transmission coefficients in an integrated power system.

7M

b) Analyze the occurrence and effects of kilometric fault in a power system.

8M

10. a) What are the effects of switching surges in integrated power system? 7M b) Using network modeling, explain the EMTP analysis. 8M




SOFTWARE PROJECT MANAGEMENT (Computer Science and Engineering, Information Technology)



Unit - I

1. a) List and explain the top ten Barry Boehm’s Industrial software Metrics. 8M b) Explain in details of three distinct improving software processes. 7M 2. a) List and explain the important trends in improving software economics. 8M b) With diagram explain the three part of waterfall model.

7M

Unit – II

3. a) With diagram explain the phases of life cycle process. 8M b) Describe the life-cycle evolution of the artifact sets with suitable diagram. 7M 4. a) Explain the three different aspects of architecture from management perspective. 8M b) Explain Primary objectives, essential activities and primary evaluation criteria of

Elaboration phase.

7M

Unit – III

5. a) Identify typical minor milestones in the life cycle of iteration. 5M b) Explain planning balance throughout the life cycle of the iteration planning process. 10M 6. a) Explain briefly the cost and schedule estimating process. 10M b) Describe Work Breakdown structure.

5M

Unit – IV

7. a) Describe briefly derivation and detailed description of seven core metrics. 10M b) Explain three fundamental sets of management metrics. 5M 8. a) Describe briefly two primary dimensions of process variability. 10M b) Identify five differences in artifacts between small and large projects.

5M

Unit – V

9. a) Explain in details of software management best practices. 8M b) Discuss the results of major milestones in a modern process of project management. 7M 10. a) Describe the top 10 software management principles. 8M b) Explain next generation cost models for project management. 7M




VIBRATIONS AND STRUCTURAL DYNAMICS

(Mechanical Engineering)



Unit – I

1. a) Define the following terms: i. Resonance ii. Degrees of Freedom iii. Phase difference

6M

b) A cylinder of mean ‘M’ and radius ‘r’ rolls without slipping on a cylindrical surface of radius ‘R’ as shown in Fig.1. Find the natural frequency for small oscillations about the lowest point.

Fig.1

9M

2. a) The mass of spring-mass-damper is excited by harmonic excitation F0sinωt. Derive an expression for magnification factor for forced vibration.

8M

b) Explain the principle of “Seismic” instrument and indicate how it can be used to measure displacement and acceleration of a vibrating body.

7M

Unit – II

3. Determine the natural frequencies and the mode shapes of a uniform thin slender rod having one end is fixed and the other end free. Show the first three principal mode shapes.

15M

4. a) Derive the Modal Matrix using Principal coordinates. 9M b) Determine the natural frequencies and the normal modes of the torsional system shown

in Fig.2 for kt2 =2kt1 and I2 =2I1.

Fig.2

6M

Cont…2

:: 2 ::

Unit – III

5. Determine the influence coefficients for the given system.

Fig.3

15M

6. a) Write a note on dynamic balancing of rotating machinery. 5M b) A shaft carrying a rotor of mass 50kg and eccentricity 2mm rotates at 12000rpm.

Determine: i. Steady state whirl amplitude ii. Maximum whirl amplitude during startup conditions of the system iii. Assume stiffness of the shaft as 40x106 N/m and external damping ratio as 0.1

10M

Unit – IV

7. Determine the natural frequencies Eigen values and mode shapes of the system shown in Fig.4 by matrix method. Assume k1=k2=k3=k and m1=m2=m3=m.

Fig.4

15M

8. Find the lowest frequency of vibration for the system as shown in Fig.5 using R-R method. Take E=196Gpa, I=10-6m4, M1=40kg and M2=20kg.

Fig.5

15M

Unit – V

9. Derive Duhamel’s Integral.

15M

10. a) Derive the general Excitation form for Duhamel’s Integral. 6M b) Solve, If the damping in the crane is given by ξ = 0.001. For 0<t<3.5s. 9M



IV B. Tech II Semester Supplementary Examinations, November – 2019 (Regulations: VCE-R15)

WIRELESS COMMUNICATIONS AND NETWORKS




Unit – I

1. a) Explain the following Wireless Services with relevant figures: i. Paging ii. Cordless Telephony

8M

b) Explain salient features of Wireless Local Area Networks (WLAN).

7M

2. a) Tabulate and compare the different Mobile radio systems considering the different types of services, level of infrastructure, cost and complexity required at the base station and subscriber equipment.

8M

b) Explain LMDS applications.

7M

Unit – II

3. a) With diagram, explain common channel signaling (CCS) network architecture. 8M

b) Consider GSM system which uses 25MHz for forward link which is broken into radio channels of 200kHz. If 8 speech channels are supported on single radio channel and it has 3 start bits, 3 stop bits, 26 training bits for allowing adaptive equalization, 8.25 guard bits and 2 bursts of 58 bits of encrypted data which is transmitted at 270.833kbps in the channel . Find: i. Number of users ii. Number of overhead bits/frame iii. Total number of bits /frame iv. Time duration of a slot v. Frame efficiency

7M

4. a) With diagram, explain message transfer part (MTP) of SS7. 7M

b) For CDMA system, if voice activity factor is assumed to have a value of 3/8 and three sectors/cell site. Derive an expression that SNR increases by factor of eight.

8M

Unit – III

5. a) Illustrate the operation and abilities of Mobile IP with a neat figure of Mobile IP scenario. 8M b) Explain any four application areas of Wireless LAN.

7M

6. a) Explain the various features, transaction classes, protocol formats and operation of Wireless Transaction Protocol with relevant figures.

8M

b) Illustrate the features, functionalities and transmission techniques used for Infrared LANs with relevant figures.

7M

Unit – IV

7. a) Explain frequency hopping – TDD in Bluetooth.

6M

b) Explain IEEE 802.11 MAC frame format. 9M

Cont…2

::2::

8. a) Explain L2CAP formats with block diagram. 9M b) Illustrate IEEE 802.11 MAC timing with a timing diagram.

6M

Unit – V

9. a) Explain how a handoff procedure is implemented in CDPD. 8M b) Examine channel access cycle in HIPERLAN-1.

7M

10. a) Explain protocol entities in the ATM that support WATM entities. 8M b) Explain mobility management in CDPD with a neat diagram. 7M




INFORMATION RETRIEVAL SYSTEM (Computer Science and Engineering & Information Technology)



Unit – I

1. a) List and explain the different objectives of information retrieval system. 7M b) With example, explain information retrieval search capabilities. 8M 2. a) Describe the use of highlighting in Boolean system. 7M b) Illustrate the four major functional processes of total information storage and retrieval

system.

8M

Unit – II

3. a) What is Indexing? Explain its objectives and write about indexing process. 7M b) Describe how the PAT data structure is different from N-gram data structure. 8M 4. a) Explain the concept of Information Extraction. 7M b) What is statistical indexing? What are its disadvantages?

8M

Unit – III

5. a) List out the guidelines on the characteristics of the classes in clustering. 7M b) Describe the six key characteristics of intelligent agents. 8M 6. a) Define Information Visualization. List out the area were information visualization and

presentation can help the user. 7M

b) Explain item clustering and hierarchy of clusters.

8M

Unit – IV

7. a) What algorithmetic basis is used for GESCAN and Fast data finder hardware text search machines?

7M

b) Explain Boyer-Moore text search algorithm with an example. 8M 8. a) What is the relationship between Precision and TURR? 7M b) How the information system is evaluated and what are the measures used in it?

8M

Unit – V

9. a) Enumerate the concept of MULTOS data model. 7M b) With example explain spatial access methods. 8M 10. a) With example explain Automatic Feature Extraction. 7M b) Describe online public access catalog. 8M




SPEECH SIGNAL PROCESSING




Unit – I

1. a) Describe the different methods used to classify the speech signals into voiced and unvoiced signals.

8M

b) Explain the acoustic components of speech perception system. 7M 2. a) Illustrate the complete discrete time speech production model. 8M b) With the assumptions, derive the wave equation for pressure.

7M

Unit – II

3. a) Formulate the basics of linear prediction analysis. 8M b) Highlight the properties of short time auto correlation function. 7M 4. a) With the schematic, explain the lattice formulation of linear prediction solution. 8M b) Explain the process of error minimization of stochastic speech sounds.

7M

Unit – III

5. a) Describe high pitched speakers-using two analysis window. 8M b) Describe pole zero estimation linearization. 7M 6. a) Describe glottal flow derivative model. 7M b) Describe all pole modeling based speech synthesis.

8M

Unit – IV

7. a) Define convolution .Write in detail about the homomorphic speech processing system. 7M b) Explain in detail with the help of block diagram a homomorphic vocoder. 8M 8. a) Define complex cepstrum and discuss the properties of the complex cepstrum. 7M b) Explain about the spectral root homomorphic filtering.

8M

Unit – V

9. a) Describe homomorphic analysis of unvoiced speech. 8M b) Discuss the need for short time speech analysis with examples. 7M 10. a) What is cepstrum? What is the role of complex cepstrum in speech analysis? 8M b) Describe the properties of complex cepstrum. 7M



IV B. Tech II Semester Supplementary Examinations, November - 2019 (Regulations: VCE-R11/R11A)

SOFTWARE ARCHITECTURE (Computer Science and Engineering)



Unit – I

1. a) Architectures are influenced by the developing organization – Comment. 7M b) Discuss briefly pipe and filter architecture style. 8M 2. a) List any six process recommendations for good architecture. 12M b) Architectures are influenced by the technical environment – Comment.

3M

Unit – II

3. With neat diagram explain the architectural structures for shared information systems. 15M 4. a) Explain the basic structural model for User Interface Software. 8M b) Write a note on the case study of World Wide Web which is designed for inter-

operability.

7M

Unit – III

5. a) Explain the pipes and filter architectural pattern. 7M b) Explain MVC architectural pattern for an interface application. 8M 6. a) Discuss formalizing the architecture for specific system. 7M b) Explain structural patterns.

8M

Unit – IV

7. a) Discuss the various requirements of architectural description languages. 9M b) Explain the notation linguistic issues in software architectural design. 6M 8. a) Discuss the necessary components and connectors of function. 7M b) Explain the various styles of architectural design environments.

8M

Unit – V

9. a) Explain with a neat diagram quality attributes scenario for availability and modifiability. 7M b) Identify the tactics for performance and security. 8M 10. a) Discuss on important quality requirements for Air traffic control system. 7M b) Identify different sections in documenting a view. 8M

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