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Code No: D0105/RR RR

III B.Tech I Semester Supplementary Examinations, May 2010ENGINEERING GEOLOGY

(Civil Engineering)Time: 3 hours Max Marks: 80

Answer any FIVE QuestionsAll Questions carry equal marks

1. Write a short note on :

(a) Water falls

(b) Distribution of rainfall

(c) River sorting of sediments. [4+6+6]

2. (a) What is meant by Cleavage? What are their different types Give at least onemineral example for each type. [2+6]

(b) Discuss different types of MICA. [8]

3. Write short notes on the following:

(a) Fossils

(b) Fault breccia

(c) Index minerals(metamorphism)

(d) Distinguishing the common types of cementing material in sandstones.[4x4=16]

4. Shales, Schists and Lime stones are in general unsuitable form civil engineeringpoint of view - Explain why? [51

3x3=16]

5. What are Geological structures? Describe how they are useful in civil engineeringoperations. [4+12]

6. Describe the chief Geological divisions of India with reference to Physiographic,Stratigraphic and structural features. [16]

7. Write an essay on Classification and Causes of Earthquakes? Describe the CivilEngineering Considerations in Seismic Areas with reference to building construc-tion.

[4+6+6]

8. Write Short Notes on :

(a) Different purposes of tunnels

(b) Tunnels faulted strata

(c) Tunnels in folded strata. [513

x3=16]

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III B.Tech I Semester Supplementary Examinations, May 2010ELECTROMECHANICS-III

(Electrical & Electronic Engineering)Time: 3 hours Max Marks: 80


1. (a) Explain the effect of harmonics on pitch and distribution factors.

(b) An alternator has 18 slots/pole and the first coil lies in slots 1 and 16. Calcu-late the pitch factor for

i. Fundamental

ii. 3

rd

harmonicsiii. 5th harmonics and

iv. 7th harmonics. [8+8]

2. (a) Draw and explain the phasor diagram of an alternator at leading power factor

(b) A 3-phase, 16-pole alternator has a star-connected winding with 144 slots and10 conductors per slot. The flux per pole is 0.03 Wb, Sinusoidally distributedand the speed is 375 r.p.m .Find the frequency in rpm and the phase and linee.m.f. assume full pitched coil. [8+8]

3. (a) What is voltage regulation? Discuss the synchronous impedance method ofcalculating voltage regulation.

(b) A 500V, 50KVA, 1-phase alternator has an effective resistance of 0.2.A fieldcurrent of 10A produces an armature current of 200A on short circuit and anemf of 450V on open circuit. Calculate

i. Synchronous impedance and reactance

ii. Full-load regulation with 0.8p.f. lagging. [8+8]

4. (a) What is an infinite bus? State the characteristics of an infinite bus. What arethe operating characteristics of an alternator connected to an infinite bus?

(b) A 3 MVA,6-pole alternator runs at 1000 r.p.m in parallel with other machineson 3.3 KV bus-bars. The synchronous reactance is 20%.Calculate the synchro-

nizing power per one mechanical degree of displacement and the correspondingsynchronizing torque. [8+8]

5. (a) State and explain the different conditions for operating alternators in parallel.

(b) Two single phase alternators operate in parallel and supply a load impedanceof (3+j4)/ph. If the impedance of the machine is (0.2+J2) and emfs are(2000+J0) and (2200+j100) volts respectively, determine for each machine.

i. Terminal voltage

ii. power factor, and

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iii. output. [8+8]

6. Write short notes on the following

(a) V and curves of synchronous motor.

(b) Synchronous condenser for Power factor improvement. [8+8]

7. (a) Explain synchronous Induction motor.

(b) A 440V, 50Hz, 3- phase circuit takes at a lagging power factor of 0.8. Asynchronous motor is used to raise the power factor to unity. Calculate theKVA input to the motor and its power factor when driving a mechanical loadof 6KW. The motor has an efficiency of 88%. [8+8]

8. (a) Draw and explain the torque speed characteristics of single-phase induction

motor based on the concept of double field revolving theory.(b) Describe the construction and principle of operation of a split phase motor.

[8+8]

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III B.Tech I Semester Supplementary Examinations, May 2010DESIGN OF MACHINE MEMBERS-I

( Common to Mechanical Engineering and Production Engineering)Time: 3 hours Max Marks: 80


1. (a) Distinguish

i. Elastic Deformation from Plastic Deformation.

ii. Hardness from toughness.

(b) Discuss briefly the Important Factors to be considered in the selection of

Materials. [8+8]2. (a) Briefly explain shear stress and shear strain?

(b) Calculate the diameter of the solid shaft to transmit 50 kW at 180 rpm. Ifthe angle of twist in a length of 4 meters is not to exceed 0.40. The allowablestress in the material is 70 MPa and modulus of rigidity is 84 GPa. [4+12]

3. (a) Explain the following methods of reducing stress concentration

i. Drilled holes

ii. Using large fillet radius

iii. Added grooves

(b) A shaft is made of steel [ultimate tensile strength 700 MPa and yield point420 MPa is subjected to a torque varying from 200N m] anti-clockwise to 600N m clockwise. Calculate the diameter of the shaft if the factor of safety is 2and it is based on the yield point and the endurance strength in shear.[6+10]

4. (a) Design the procedure for designing a lozenge joint.

(b) A triple riveted lap joint with zig-zag riveting is to be designed to connect twoplates of 6 mm thickness. Determine the diameter of the rivet, pitch of rivetsand distance between the rows of the rivets. Indicate how the joint will fail.Also, find the efficiency of the joint. The permissible stresses are 120 MPa intension, 100 MPa in shear and 150 MPa in crushing. [6+10]

5. (a) Show that the normal stress in case of an annular fillet weld subjected tobending is given by

= (5.66 M) / ( s d2 )where M = Bending moment; s = weld size and d = Diameter of cylindricalelement welded to the flat surface.

(b) A 50 mm diameter solid shaft of length 200 mm is welded at one end to aflat plate while the other end is subjected to a load of 10 KN acting verticallydownwards. If the size of the weld is 15 mm, find the maximum normal andshear stress in the weld. [6+10]

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6. (a) Describe the purpose of gib in cotter joint? What are the applications of cotterjoints?

(b) Design a knuckle joint to transmit 140 kN, with permissible stresses in tension;shear and compression are 75 Mpa ; 60 Mpa and 150 Mpa respectively.[6+10]

7. A shaft is supported by two bearings placed 1.2m apart. A 600mm diameter pulleyis mounted at a distance of 300mm to the right of left hand bearing and this drivesa pulley directly below it with the help of a belt having maximum tension of 2kN.Another pulley 400mm diameter is placed 200mm to the left hand bearing and isdriven with the help of an electric motor and belt which is placed horizontally tothe right. The angle of contact for both the pulleys is 1800 and coefficient of frictionis 0.24. Calculate the diameter of the shaft taking working stresses of 63Mpa intension and 42Mpa in shear. [16]

8. (a) Why are two universal joints after used when there is angular misalignmentbetween two shafts.

(b) Design a compression coupling for a shaft to transmit 1300N-m. The allowableshear stress for the shaft and key is 40Mpa and the number of bolts connectingthe two hawse are 4. The permissible tensile stress for the bolt material is70Mpa. The coefficient of friction between the muff and the shaft surface maybe taken as 0.3. [6+10]

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III B.Tech I Semester Supplementary Examinations, May 2010DIGITAL IC APPLICATIONS

(Electronics & Communication Engineering)Time: 3 hours Max Marks: 80


1. (a) Distinguish between static and dynamic power dissipation of a CMOS circuit?Derive the expression for dynamic power dissipation?

(b) Compare HC, HCT, VHC and VHCT CMOS logic families with the help ofinput specifications with VCC from 4.5V to 5.5V? [10+6]

2. (a) Explain the following terms with reference to TTL gate?i. Logic levels

ii. DC Noise margin

iii. Low-state unit load

iv. High-state fanout [4+4]

(b) List out TTL families and compare them with reference to propagation delay,power consumption, speed-power product and low level input current? [8]

3. (a) Design the logic circuit and write a data-flow style VHDL program for thefollowing function?

F (W) = A,B,C,D (1,4,5,7,9,13,15)(b) Write data-flow style VHDL program for full adder and use this entity to

develop a 2-bit adder? [8+8]

4. (a) Design a 16-bit comparator using 7485s?

(b) Write a behavioral VHDL program to compare 16-bit signed and unsignedintegers? [8+8]

5. A 16-bit barrel shifter is a combinational logic circuit with 16-data inputs, 16-dataoutputs and 4-control inputs. The input word is rotated by a number of bit positionsspecified by control bits. Write a VHDL program for the above implementation?

[16]

6. (a) Draw the logic diagram of 74x163 binary counter and explain its operation?

(b) Design a modulo-200 counter using two 74x163 binary counters? [8+8]

7. (a) Define clock skew? Explain how clock skew leads to incorrect outputs insynchronous circuits? Design one logic circuit that minimizes clock skew?

(b) Explain with timing waveforms, different operations during one clock cycle ina synchronous system structure? [8+8]

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8. (a) Explain the operation of Synchronous SRAM with the help of its internalarchitecture?

(b) With a neat diagram explain the general architecture of CPLD? Discuss thekey features of Xilinx XC9500 CPLD family? [8+8]

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III B.Tech I Semester Supplementary Examinations, May 2010PRINCIPLES OF PROGRAMMING LANGUAGES

( Common to Computer Science & Engineering and Computer Science &Systems Engineering)

Time: 3 hours Max Marks: 80Answer any FIVE Questions

All Questions carry equal marks

1. (a) Why the programming languages like C, Pascal etc are called high level lan-guages. Give reasons. [5]

(b) What are the advantages of high level languages over assembly languages? [5]

(c) C is called as high level language with low level features. Comment on it. [6]

2. Give BNF notation for if loop, case statement, does-while statement in C. give thecorresponding syntax graph. [16]

3. Write short notes on coercion, type error, type checking and strong typing. [16]

4. Discuss implementation issues associated with pointer and reference data types.[16]

5. (a) Explain how subprogram names are passed as parameters? [8]

(b) Explain how subprogram is overloaded? Give examples. [8]

6. Discuss how abstract data types are implemented in SIMULA 67 and Ada. [16]

7. (a) Explain how exceptions bind to handlers in java. [8]

(b) Explain fact statements and rule statements in prolog. [8]

8. (a) Explain structures and arrays in ML. Give examples. [8]

(b) Discuss briefly about expressions in ML. [8]

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III B.Tech I Semester Supplementary Examinations, May 2010MASS TRANSFER OPERATIONS-I

(Chemical Engineering)Time: 3 hours Max Marks: 80


1. (a) Write the expression for flux in steady-state diffusion of A through non-diffusing B of molecular diffusion in liquids.

(b) Calculate the rate of diffusion of acetic acid (A) across a film of non-diffusingwater (B) solution 1 mm thick at 170C when the concentrations on oppositesides of the film are, respectively, 9 and 3 wt% acid. The diffusivity of acetic

acid in the solution is 0.95 109m2/s. The density of 9 wt% acitic acid 3wt% actic acid solution are 1012 kg/ms and 1003 kg/m3 respectively. [8+8]

2. (a) Write short note on Film Theory.

(b) Distinguish between molecular and eddy diffusion. [8+8]

3. (a) Derive an expression to find local overall gas phase mass Transfer coefficient?

(b) What is the necessity of introducing the overall mass Transfer coefficient?

[10+6]

4. Explain the following undesirable operations in Sieve-tray tower?

(a) Coning

(b) Dumping

(c) Entrainment

(d) Flooding [4x4]

5. An ammonia gas stream from a reactor contains 25% by volume of ammonia and75% by volume of air. Pure water is added to absorb ammonia in an absorptiontower at 300C and 1 atm. The total gas flow rate is 1000moles/h. It is desired toreduce the concentration of ammonia to 2% by volume in the inlet.

(a) What is the minimum liquid rate (if counter current flow is used).(b) what will be the number of theoretical plates required, if two times the mini-

mum liquid rate is used.

Equilibrium relation ship is given by: y = 2x; where y = mole fraction of ammoniain the gas and x is the mole fraction of ammonia in the liquid. What is an absorptionfactor? [16]

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6. (a) Determine the wet bulb and adiabatic saturation temperature for a toluene-air mixture at 620C dry bulb temperature and absolute humidity=0.050 kgtoluene vapor per kg of air. The following data are available

hg/ky=1223(/DAB)0.567 where , =1.95x105 kg/m.s

= 1.06 kg/m3

DAB = 0.92x105m2/s

Latent heat of vaporization for toluene=404.4 kJ/kg

Vapor pressure of toluene =46.2 mm Hg

Specific heat of air =1.005 kJ/kg

Specific heat of toluene=1.265 kJ/kg.

(b) What is Lewis relation? Can it be applied for organic liquid vapor-gas system?Explain your answer. [10+6]

7. (a) A plant wishes to dry a certain type of fiber board in sheets 1.2m 2m 12mm. To determine the drying characteristics a 0.3m0.3m12mm sampleof the board with the edges sealed so that drying took place from the twolarge faces only, was suspended from a balance in a laboratory cabinet drierand exposed to a current of hot dry hot air. The initial moisture content was75%. The sheets lost weight at the constant rate of 1104kg/sec. Until themoisture content fell to 60% where upon the drying rate fell. Measurementsof the rate of drying were discontinued, but after a long period of exposureto the air it was established that the equilibrium moisture content was 10%.The dry mass of the sample was 0.9kg.All moisture content on the wet basis.Determine the time for drying the large sheets from 75 to 20% moisture under

the same drying conditions.

(b) Write short notes on rate of drying curve. [10+6]

8. (a) Enumerate different driers used for drying rigid or granular solids.

(b) Describe the working of a forced draft cooling towers.

(c) Give threes examples for mass transfer using energy as the separating agentand explain. [5+5+6]

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III B.Tech I Semester Supplementary Examinations, May 2010LINEAR AND DIGITAL IC APPLICATION

( Common to Electronics & Instrumentation Engineering, Bio-MedicalEngineering, Electronics & Control Engineering, Mechatronics and

Electronics & Telematics)Time: 3 hours Max Marks: 80


1. (a) Draw the pin diagram and schematic symbol of a typical OP-AMP IC741 andexplain the function of each pin [5]

(b) Discuss the three basic types of linear IC packages and briefly explain the

characteristics of each [5](c) State the two types of integrated circuits classified according to their mode of

operation and briefly explain the significance of each. [6]

2. (a) Explain the differences between ac and dc amplifiers [6]

(b) What is instrumentation amplifier? What are its features? List any threeapplications of instrumentation amplifier. [10]

3. (a) What feedback is preferred for oscillators and why? What is the effect ofnegative feedback? [8]

(b) Design an OP-AMP based relaxation oscillator and derive the frequency of

oscillation. [8]

4. (a) What are the two basic modes in which the 555 timer operates? Briefly explainthe differences between the two operating modes of the 555 timer. [8]

(b) Design a ramp generator using 555 timer having an output frequency of ap-proximately 5KHz. [8]

5. Explain the terms Lock range, Capture range and Pull-in time a PLL. How areLock ranges and Capture range determined? [16]

6. (a) Derive the transfer function for a general second order sallen-key filter withsuitable circuit diagram. [8]

(b) Design a Butterworth filter for a given normalized polynomial ofS2+1.414S+1.Assume necessary data. [8]

7. For the circuit shown below (figure 1)

(a) Explain the operations and the circuit with the help of Truth-Table. [7]

(b) If hFE of Q1 is 30, find hFEmin of Q2. [3]

(c) If hFE of Q2 is 30, what is Fan-Out? [3]

(d) Find Noise Margins. [3]

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Figure 1:

8. (a) Define the following terms as related to DAC [4]

i. Accuracyii. Resolution.

(b) Define the following terms as related to ADC [4]

i. Conversion time

ii. Percentage resolution.

(c) Which type of DAC is more preferable? Draw the circuit diagram and obtainexpression for output voltage for 4 bits. [8]

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III B.Tech I Semester Supplementary Examinations, May 2010COMPUTER GRAPHICS

( Common to Information Technology and Electronics & ComputerEngineering)

Time: 3 hours Max Marks: 80Answer any FIVE Questions

All Questions carry equal marks

1. (a) What are the merits and demerits of raster-scan CRT.

(b) Consider a raster system with resolution of 640480. How many pixels couldbe accessed per second by a display controller that refreshes the screen at arate of 60 frames per second. What is the access time per pixel? [8+8]

2. What is meant by aliasing? Discuss about the two antialiasing methods. [6+5+5]

3. (a) Show that two successive rotations about the origin are commutative. Thatis R1, R2, = R2, R1.

(b) Reduce the triangle with vertices A(0,0), B(1,1) and C(0,1) to half of its sizewhile keeping B(1,1) fixed. [8+8]

4. Find the viewing transformation that maps a window whose left corner is at (1,1)and upper right corner is at (3,5) on to a view port that has lower corner at (0,0)and upper right corner at

1

2, 12

. [16]

5. Distinguish the transformations performed in 2-D graphics and 3-D graphics. Ex-plain how many matrices are needed to define each of the basic transformations.

[8+8]

6. Discuss about the following:

(a) Parametric functions

(b) Mach-band effect

(c) Surface normal. [6+5+5]

7. Justify that the Beziers method possesses global control in curve generation. Demon-strate with suitable illustrations. [16]

8. (a) Explain the role of texturing in realistic image generation.

(b) How the mapping from texture space to image space is performed in3-D space.[8+8]

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