## Electrical Machines I 4th ND11 EE2251

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2011.
Fourth Semester
Electrical and Electronics Engineering
EE 2251 - ELECTRICAL MACHINES - I
(Regulation 2008)

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PART A — (10 × 2 = 20 marks)

1. Define statically and dynamically induced EMF.
2. What is Hysteresis loss and how can this loss be minimized?
3. Why is transformer rated in KVA?
4. Compare two winding transformer and auto transformer.
5. What are the advantages of analyzing energy conversion devises by field energy concept?
6. Draw the general block diagram of electromechanical energy conversion device.
7. What is back EMF in a D.C. motor?
8. Define winding factor.
9. What is armature reaction in DC machines?
10. Explain why Swinburne’s test cannot be performed on DC series motor.

PART B — (5 × 16 = 80 marks)

11. (a) Compare electric and magnetic circuit by their similarities and dissimilarities. (16)
Or
(b) A ring composed of three sections. The cross section area is 0.001 m2 for each section. The mean arc length are Ia = 0.3 m, Ib,= 0.2 m, Ic = 0.1 m. an air gap length of 0.1 mm is cut in the ring. r µ for sections a, b and c are 5000, 1000 and 10000 respectively. Flux in the air gap is 7.5 × 10–4 Wb. Find (i) mmf (ii) exciting current if the coil has 100 turns (iii) reluctance of the sections. (16)

12. (a) (i) Explain clearly the causes of voltage drop in a power transformer on load and develop the equivalent circuit for a single phase transformer. (10)
(ii) Derive an expression for saving of copper when an auto transformer is used. (6)
Or
(b) A 3-phase step down transformer is connected to 6.6 KV mains and takes 10 Amps. Calculate the secondary line voltage and line current for the (i) (ii) Y Y (iii) Y and (iv) Y connections. The ratio of turns per phase is 12 and neglect no load losses. (16)

13. (a) Obtain an expression for the mechanical force of field origin in a typical attracted armature relay. (16)
Or
(b) Find an expression for the magnetic force developed in a doubly excited magnetic systems. (16)

14. (a) Derive an expression for emf generated in
(i) Synchronous machine (8)
(ii) D.C machine. (8)
Or
(b) A 3F, 50 Hz, star connected alternator with two layer winding is running at 600 rpm. It has 12 turns/ coil, 4 slots/pole/phase and a coil pitch of 10 slots. If the flux per pole is 0.035 Wb sinusoidally
distributed, Find the phase and line emf induced. Assume that the total turns/phase are series connected. (16)

15. (a) Explain the different methods of excitation and characteristics of a DC motors with suitable diagrams. (16)
Or
(b) Explain the Ward-Leonard system of controlling the speed of a DC shunt motor with help of neat diagram. (16)

## Applied Geology 3rd ND09 AG2211

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2009
Third Semester
Civil Engineering
AG 2211 - APPLIED GEOLOGY
(Regulation 2008)
Use neat sketches wherever necessary

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PART A — (10 × 2 = 20 Marks)

1. Give a brief account of the Earth’s interior.
2. What are the effects of weathering on the engineering properties of rocks?
3. Write the chemical composition, physical properties and uses of Calcite.
4. List the properties of petroleum bearing reservoir rocks.
5. Write about the mineral composition, origin and properties and uses of basalt.
6. Bring out the differences between dolerite and pegmatite.
7. Briefly describe Dip and Strike of rocks use a neat diagram.
8. What is the difference between the Wenner and Schlumberger methods?
9. Define the terms ‘overlap’ and ‘parallax’.
10. Give the functions of a breakwater.

PART B — (5 × 16 = 80 Marks)

11. (a) Explain the work of a river and describe the various erosional and depositional landforms created by a river.
Or
(b) How are earthquakes caused? Give an account of the earthquake belts in India.

12. (a) Give a detailed account of the chemical composition, physical properties, origin, occurrence, engineering behaviour and uses of the clay minerals.
Or
(b) Describe the varieties, composition, properties, origin & Indian occurrences of coal.

13. (a) Describe the mineral composition, texture, origin, engineering properties and uses of Granite, Limestone, Quartzite and Schist.
Or
(b) List the various laboratory and field tests to be carried out to determine the engineering properties of rocks.

14. (a) Classify folds and faults in rocks and explain how they influence the design of dams.
Or
(b) Write an elaborate account of the seismic methods of investigation in civil engineering.

15. (a) Classify aerial photographs and explain in detail their role in civil engineering surveys.
Or
(b) Give a detailed account of the types of landslides, the causative factors and the methods to prevent landslides.

## Strenght Of Material 4th AM10 CE2252

B.E./B.Tech. DEGREE EXAMINATION, APRIL/MAY 2010
Fourth Semester
Civil Engineering
CE2252 - STRENGTH OF MATERIALS
(Regulation 2008)

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PART A — (10 × 2 = 20 Marks)

1. A beam of span 4 m is cantilever and subjected to a concentrated load 10 kN at free end. Find the total strain energy stored. Take the Flexural rigidity is EI.
2. Write down Maxwell’s reciprocal theorem.
3. A fixed beam of span ‘L’ is subjected to UDL throughout w/m. What is end moments and moment at the centre?
4. Draw BMD for a propped cantilever beam span ‘L’ subjected to UDL throughout w/m.
5. Define core of a section and draw the same for a circular section.
6. Write Rankine’s equation for column.
7. Define principal plane and principal stress.
8. State the principal stress theory of failure.
9. What is ‘fatigue strength’ and ‘endurance ratio’ in a fatigue testing of material?
10. Write the Winkler-Bach formula for a curved beam.

## Automotive Electrical And Electronics 5th ND10 AT2302

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2010
Fifth Semester
Automobile Engineering
AT 2302  AUTOMOTIVE ELECTRICAL AND ELECTRONICS
(Regulation 2008)

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PART A — (10 × 2 = 20 Marks)

1. What do you mean by rating of a battery?
2. What is meant by battery plate sulphation?
3. Give the requirements of starter motor.
4. What do you mean by third brush regulation?
5. List out the problems encountered in the contact points of ignition system.
6. Differentiate hot spark plug from cold spark plug.
7. What is adaptive ignition system?
8. Differentiate HEI distributor and conventional breaker-point.
9. How do you reduce head light dazzling?
10. Mention the advantages of earth return system.

PART B — (5 × 16 = 80 Marks)

11. (a) Describe the testing procedure for laboratory and manufacturer’s tests of lead-acid battery with neat sketches.
Or
(b) (i) Explain the constant current charging method of automotive batteries with a sketch. (10)
(ii) Explain the care and maintenance of automotive batteries. (6)

12. (a) Explain the constructional and working details of solenoid operated pinion drive of starter motor with a sketch.
Or
(b) Explain the working principle of alternator with its three stator circuits. State the advantages of it over D.C. generator.

13. (a) Draw the circuit diagram for battery coil ignition system of six cylinder four-stroke petrol engine and explain it.
Or
(b) (i) What is the need of altering the ignition timing with respect to engine speed and load? (4)
(ii) Explain the centrifugal and vacuum advance mechanisms with the help of neat sketches. (12)

14. (a) Explain the distributorless ignition system with suitable sketch.
Or
(b) (i) Describe the working of breakerless ignition system with neat sketch. (8)
(ii) Explain electronic spark timing/control with a circuit diagram.(8)

15. (a) (i) What is meant by dazzling of head lights? (2)
(ii) Explain the various anti-dazzling devices with neat sketches. (14)
Or
(b) Write notes on the following :
(i) Electronic fuel pump, (5)
(ii) Electrical horn, (5)
(iii) Oil pressure gauge. (6)

## Unix Internals 6th ND11 CS2028

Anna University
B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2011.
Sixth Semester
Computer Science and Engineering
CS2028 - UNIX Internals
(Regulation 2008)

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PART – A (10 × 2 = 20 Marks)

1. What is u-area?
2. What is the use of buffer cache?
3. What should happen if the kernel attempts to awaken all processes sleeping on an event, but no processes is asleep on the event at the time of wakeup?
4. What are signals?
5. What is close system call?
6. What is the use FORK system call?
7. What are special files?
8. What is the use of shell?
9. What are streams?
10. What is character device switch table?

PART B-(5*16=80 MARKS)

11. (a) List out the reasons for popularity of UNIX OS.
(b) How to exam us the architecture of UNIX.
OR
12. (a) How to exam us about file sub system.
(b) How to exam us about kernel data structures.

13. (a) How to exam us about the Organization of buffer header.
(b) Explain about algorithms for studying and writing disk blocks.
OR
14. (a) How to exam us how byte offset is converted to block numbers in the file system.
(b) Write a note on superblock

15. Write short notes on
(a). Pipes
(b) STAT and FSTAT.
OR
16. (a) explain about file and record locking .
(b) How to exam us about DUP system call.

17. (a) How to exam us about process situation.
(b) Write notes on process creation.
OR
18. (a) How to exam us about attached algorithm.
(b) Explain about system boot and unit process.

19. (a) How to exam us about swapping in detail
(b) Explain about fair share scheduler.
OR
20. (a) How to exam us demand paging in detail.
(b) explain in detail about driver interfaces.

## Mobile And Pervasive Computing 7th ND11 CS2402

Anna University
B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2011.
Seventh Semester
Computer Science and Engineering
CS 2402 MOBILE AND PERVASIVE COMPUTING
(Regulation 2008)

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PART A (10 × 2 = 20 marks)

1. What are the four types of handover available in GSM?
2. Distinguish between mobile terminated call and mobile originated call.
3. Mention the advantages of WLAN?
4. What are the three Low Power States provided by Bluetooth?
5. What are the requirements of mobile IP standard?
6. Differentiate wired networks routing from ad-hoc wireless networks routing.
7. List the advantages and disadvantages of mobile TCP?
8. Define WAE.
9. What is Pervasive Computing?
10. What are the various issues related to device management in pervasive computing?

PART B (5 × 16 = 80 marks)

11. (a) (i) Explain the GSM system architecture with a neat diagram. (8)
(ii) Describe the security services provided by GSM. (8)
Or
(b) (i) Explain the protocol architecture of GSM for signaling. (8)
(ii) Explain the architecture of GPRS with a neat diagram. (8)

12. (a) (i) Describe HiperLAN architectural components and their interactions. (8)
(ii) Explain the architecture of WiFi in detail. (8)
Or
(b) (i) Explain the system architecture of IEEE 802. (8)
(ii) Describe the architecture of WiMAX in detail. (8)

13. (a) (i) List the entities involved in mobile IP and describe the process of data transfer from a mobile node to a fixed node and vice versa. (8)
(ii) Why is conventional routing in wired networks not suitable for wireless networks? Substantiate your answers with suitable examples. (8)
Or
(b) (i) Explain in detail Dynamic Host Configuration Protocol. (8)
(ii) Describe how the multicast routing is done in ad-hoc networks. (8)

14. (a) (i) State the requirements of WAP. Explain its architectural components. (8)
(ii) Explain WML and WML scripts with an example. (8)
Or
(b) (i) What is WTP? Discuss about its classes. (8)
(ii) Explain the architecture of WTA. (8)

15. (a) (i) Describe the various hardware components involved in pervasive computing devices. (8)
(ii) Explain how a pervasive web application can be secured using an ‘Authentication Proxy’. (8)
Or
(b) (i) What are the applications of pervasive computing? Discuss any two of them.
(8)
(ii) Explain how pervasive web applications can be accessed via WAP. (8)

## Digital Signal Processing 5th AM11 CS2403

Reg. No. :
B.E./B.Tech. DEGREE EXAMINATION, APRIL/MAY 2011
Fifth Semester
Information Technology
CS 2403 - DIGITAL SIGNAL PROCESSING
(Regulation 2008)

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PART A — (10 × 2 = 20 marks)

1. State sampling theorem.
2. Distinguish between power and energy signal with an example.
3. State and prove Parseval's theorem.
4. Compute the DFT of the four point sequence x(n ) = [0,1,2,3].
5. What is meant by warping?
6. What are the limitations of impulse invariance method?
7. List out the conditions for the FIR filter to be linear phase.
8. What is meant by limit cycle oscillations?
9. Let x(n ) = [1,2,-3,4,5,-6]. Sketch x (n 2) and x (3n ).
10. Give any two image enhancement methods.

PART B — (5 × 16 = 80 marks)

11. (a) (i) Suppose a LTI system with input x(n ) and output y(n ) is characterized by its unit sample response h(n ) (0.8) u(n ) = n . Find the response y(n ) of such a system to the input signal x(n ) = u(n ) .(8)
(ii) A causal system is represented by the following differenceequationnCompute the system function H (z ) and find the unit sample response of the system in analytical form. (8)
Or
(b) (i) Compute the normalized autocorrelation of the signal x(n ) = a u(n ),0 < a <1 .="" br="" n="">(ii) Determine the impulse response for the cascade of two LTI system having impulse responses ( ) (1 / 2) ( ) 1 h n u n = n and ( ) (1 / 4) ( ) 2 h n u n = n . (8)

12. (a) By means of the DFT and IDFT, determine the response at the FIR filter with the impulse response h(n ) = [1,2,3] and the input sequence x(n ) = [1,2,2,1].
Or
(b) Compute the DFT of the following sequence x(n ) using the decimation in time FFT algorithm x(n ) = [1,-1,-1,-1,1,1,1,-1].

13. (a) (i) Find the H (z ) corresponding to the impulse invariance design using a sample rate of 1/T samples/sec for an analog filter H (s) specified as follows : (6)
(ii) Design a digital low pass filter using the bilinear transform to satisfy the following characteristics (1) Monotonic stop band and pass band (2) - 3 dB cutoff frequency of 0.5 p rad (3) magnitude down at least -15 dB at 0.75p rad . (10)
(b) Design an IIR filter using impulse invariance technique for the given  . Assume T = 1 sec. Realize this filter using direct form I and direct form II. (16)

14. (a) Design and obtain the coefficients of a 15 tap linear phase FIR low pass filter using Hamming window to meet the given frequency response (16)
Or
(b) (i) Determine the coefficients of a linear phase FIR filter of length M = 15 which has a symmetric unit sample response and a frequency response that satisfies the conditions
(ii) The output of A/D converter is applied to digital filter with the system function. Find the output noise power from the digital filter when the input signal is quantized to have 8 bits. (8)

15. (a) Derive and explain the frequency domain characteristics of the Decimator by the factor M and interpolator by the factor L. (16)
Or
(b) With neat diagram explain any two applications of adaptive filter using LMS algorithm. (16)

## Design And Analysis of Algorithms 4th ND11 CS2251

Reg. No. :
B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2011.
Fourth Semester
Computer Science and Engineering
CS 2251 - DESIGN AND ANALYSIS OF ALGORITHMS
(Regulation 2008)
Time : Three hours Maximum : 100 marks
Answer ALL questions.

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PART A — (10 × 2 = 20 marks)

1. What do you mean by linear search?
2. What is the properties of big-Oh notation.
3. What greedy algorithms?
4. What Knapsack problem?
5. What is traveling salesperson problem?
6. What do you mean by multistage graphs?
7. State the general backtracking method?
8. What is graph cloning?
9. What is spanning tree? Give an example.
10. What is NP Completeness?

PART B — (5 × 16 = 80 marks)

11. (a) (i) Define Asymptotic notations. Distinguish between Asymptotic notation and conditional asymptotic notation. (10)
(ii) Explain how the removing condition is done from the conditional Asymptotic notation with an example. (6)
Or
(b) (i) Explain how analysis of linear search is done with a suitable illustration. (10)
(ii) Define recurrence equation and explain how solving recurrence equations are done. (6)

12. (a) What is divide and conquer strategy and explain the binary search with suitable example problem.
Or
(b) Distinguish between Quick sort and Merge sort, and arrange the following numbers in increasing order using merge sort. (18, 29, 68,32, 43,37, 87, 24, 47, 50)

13. (a) (i) Explain the multistage graph problem with an example. (8)
(ii) Find an optimal solution to the knapsack instance n = 7, m= 15 (p1, p2, p3, ….p7) = (10, 5, 15, 7, 6, 18, 3) and (w1, w2, w3, ...w7) (2, 3, 5, 7, 1, 4, 1) (8)
Or
(b) Describe binary search tree with three traversal patterns? Give suitable example with neat diagram for all three traversal of binary search tree.(16)

14. (a) (i) How does backtracking work on the 8 Queens problem with suitable example? (8)
(ii) Explain elaborately recursive backtracking algorithm? (8)
Or
(b) What is Hamiltonian problem? Explain with an example using backtracking. (16)

15. (a) Write a complete LC branch-and-bound algorithm for the job sequencing with deadlines problem. Use the fixed tuple size formulation. (16)
Or
(b) Write a non-deterministic algorithm to find whether a given graph contains a Hamiltonian cycle. (16)

## Constructiomn Techniques, Equipments and Practices 3rd ND09

Question Paper Code : T3021
B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2009
Third Semester
Civil Engineering
CE 2203 - CONSTRUCTION TECHNIQUES, EQUIPMENT AND PRACTICES
(Regulation 2008)

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PART A — (10 × 2 = 20 Marks)

1.State the importance of water cement ratio.
2.What are the tests to be conducted on fresh concrete?
3.How are bond stones placed in stone masonry?
4.What is ‘slip form’?
5.Differentiate cofferdam from caisson.
6.What do you understand about diaphragm walls?
7.What is meant by articulated structures?
8.Distinguish between space decks and bridge decks.
9.What is mucking?
10.What do you understand about truck agitators?

PART B — (5 × 16 = 80 Marks)

11.    (a)    Write down the complete procedure of mix design as per BIS.
Or
(b)    Explain  the  method  of  conducting  different  non-destructive   tests  on concrete.

12.    (a)    Enumerate the procedure of constructing the following types of floorings :
(i)Terrazzo Flooring.
(ii)Tiled Flooring.
(iii)   PVC Flooring.
(iv)Asphalt Flooring.
Or
(b)Bring out the general principles and factors in acoustical design of a hall.

13.(a)Explain the methods of dewatering the foundation trenches.
Or
(b)What is pneumatic caisson? Where is it adopted? How is it constructed?

14.(a)Illustrate   about   the   support   structures   for  heavy   equipments   and conveyors.
Or
(b)Describe the merits and demerits of various types of shells.

15.(a)Discuss the different compactors in detail.
Or
(b)What are the different types of cranes? Explain the types in detail.

## Surveying 3rd ND09 CE2204

Question Paper Code : T3022
B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2009
Third Semester
Civil Engineering
CE 2204 - SURVEYING - I
(Regulation 2008)

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PART A — (10 × 2 = 20 Marks)

1.What are arrows?
2.What is plumb BOB?
3.What is magnetic meridian?
4.What is whole circle bearing?
5.What is foresight?
6.What is backsight?
7.What is centring of a theodolite?
8.What is face right observation?
9.What is tangent length in a simple curve?
10.What is mid-ordinate in a simple curve?

PART B — (5 × 16 = 80 Marks)

11.(a)Explain the method of direct ranging in detail.
Or
(b)Explain the method of reciprocal ranging in detail.

12.(a)Discuss the working principle of prismatic compass in detail.
Or
(b)Explain the two point proble method of plane table surveying.

13.(a)Explain the method of profile levelling.
Or
(b)Describe the three indirect methods of locating contours.

14.(a)Describe the essential parts of a transit theodolite.
Or
(b)Discuss the temporary adjustments of a transit theodolite.

15.(a)Explain  the setting  out of a simple  curve  by the  Rankine’s  method  of tangential angle.
Or
(b)Explain the setting out of a simple curve by two theodolite method.

## Design of transmission Systems 6th AM11 ME2352

B.E./B.Tech. DEGREE EXAMINATION, APRIL/MAY 2011
Sixth Semester
Mechanical Engineering
ME 2352 - DESIGN OF TRANSMISSION SYSTEMS
(Regulation 2008)
(Approved Design Data book is permitted)

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PART A — (10 × 2 = 20 marks)

1. Distinguish between open drive and cross drive of a belt drive. Which is better?
2. Give any three applications of chain drives. What are their limitations?
3. Define module.
4. What are the common forms of gear tooth profile?
5. Under what situation, bevel gears are used?
6. In worm gear drive, only the wheel is designed. Why?
7. What are preferred numbers?
8. What are the possible arrangements to achieve 12 speeds from a gear box?
9. Name few commonly used friction materials.
10. What is a self-locking brake?

PART B — (5 × 16 = 80 marks)

11. (a) Select a flat belt to drive a mill at 250 rpm from a 10 kw, 730 rpm motor.
Centre distance is to be around 2m. The mill shaft pulley is of 1 m diameter.
Or
(b) A truck equipped with a 9.5 kw engine uses a roller chain as the final drive to the rear axle. The driving sprocket runs at 900 rpm and the driven sprocket at 400 rpm with a centre distance of approximately 600 mm. Select the roller chain.

12. (a) In a spur gear drive for a stone crusher, the gears are made of C40 steel.
The pinion is transmitting 20 kw at 1200 rpm. The gear ratio is 3. Gear is to work 8 hrs per day, six days a week and for 3 years. Design the drive.
Or
(b) Design a pair of helical gears to transmit 10 kw at 1000 rpm of the pinion. Reduction ratio of 5 is required.

13. (a) Design a bevel gear drive to transmit 7.36 kw at 1440 rpm for the following data. Gear ratio = 3. Material for pinion and gear C45 surface hardened.
Or
(b) Design a worm drive for a speed reducer to transmit 15 kw at 1440 rpm of the worm shaft. The desired wheel speed is 6 rpm. Select suitable worm and wheel materials.

14. (a) The minimum and maximum speed of a six speed gear box are to be 160 and 500 rpm. Construct the kinematic arrangement and the ray diagram of the gear box. Also find the number of teeth on all gears.
Or
(b) Design a 12 speed gear box for an all geared headshock of a lathe. Maximum and minimum speeds are 600 rpm and 25 rpm respectively. The drive is from an electric motor giving 2.25 kw at 1440 rpm.

15. (a) A multi – disc clutch has three discs on the driving shaft and two on the driven shaft is to be designed for a machine tool, driven by an electric
motor of 22 kw running at 1440 rpm. The inside diameter of the contact surface is 130mm. The maximum pressure between the surfaces is limited to 0/N/mm2. Design the clutch. Take µ = 0.3 ; n1 = 3; n2 = 2.
Or
(b) Determine the capacity and the main dimensions of a double block brake for the following data.
The brake sheave is mounted on the drum shaft. The hoist with its load weights 45 kN and moves downwards with a velocity of 1.15 m/s. The pitch diameter of the hoist drum is 1.25m. The hoist must be stopped
with in a distance of 3.25 m. The kinetic energy of the drum may be neglected.