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[4263] - 267T.E. (Electronics)

SENSORS AND INTERFACES

(2008 Pattern) (Semester-II)

Time : 3 Hours] [Max. Marks :100Instructions to the candidates:

1) Answer any 3 questions from each section.2) Answers to the two sections should be written in separate books.3) Neat diagrams must be drawn wherever necessary.4) Figures to the right indicate full marks.5) Use of logarithmic tables slide rule, Mollier charts, electronic pocket

calculator and steam tables is allowed.6) Assume suitable data, if necessary.

SECTION - I

Q1) a) Explain with neat diagram the concept of relative humidity

measurement using psychrometers and hygrometers. [8]

b) Explain the concept of incremental optical disc shaft encoder to measure

speed of rotation of electric motor. [8]

OR

Q2) a) List various types of proximity sensors. Explain any one in detail. [8]

b) Compare thermocouple, RTD and semiconductor temperature sensors.

[8]

Q3) a) Design a signal conditioning circuit for a PT100 RTD using

Wheatsones bridge and instrumentation amplifier. [10]

b) Explain with neat diagram I/P and P/I converters. [8]

OR

Q4) a) Explain with circuit diagram voltage to frequency and frequency tovoltage converters. [10]

b) Write a short note on SMART and intelligent transmitters. [8]

Q5) a) Describe working of a typical flash A/D converter for 4 bit operation.[8]

b) Explain interfacing of [8]

i) Electromechanical relay and

ii) Proximity switch to a PIC microcontroller.

OR

Q6) a) Draw and explain the interfacing of LCD to 8051 microcontroller.[8]

b) State different types of ADC and DAC and give the specifications of

an ADC. [8]

SECTION - II

Q7) a) Explain the block diagram of data logger and make comparison

between DAS and data logger. [8]

b) Write short notes on: [8]

i) IEEE 488 standard

ii) I2C bus

OR

Q8) a) Write short notes on Foundation field bus. [8]

b) Explain multichannel DAS and enlist its objectives and applications.[8]

Q9) a) What are actuators? Give their classification and explain Piston actuators

in details. [8]

b) Explain the principle and operation of D.C motor. [8]

OR

Q10) a) What are valves ? Explain. [8]

i) Spool valve

ii) Poppet valve

iii) Rotary spool valve

iv) Pressure control valve

b) Explain the following terms related to control valve characteristics:[8]

i) Linear

ii) Quick opening

iii) Equal percentage

Q11) a) With block diagram explain PLC architecture. [6]

b) Explain the PLC operating cycle. [6]

c) Explain the importance of latching done in PLC with an example.[6]

OR

Q12) a) What are the various specifications of PLC? Explain them. [6]

b) How is PLC advantageous over the relay system? [6]

c) How the input channel is protected from input signal of sensors? [6]

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[4263] - 234T.E. (Production)

PRODUCTION MANAGEMENT(2008 Pattern) (Semester - I)


1) Answer any three questions from each section.2) Answers to the two sections should be written in separate books.3) Neat diagrams must be drawn wherever necessary.4) Use of the logarithmic tables slides rule, Mollier charts, electronics pocket

calculator and steam tables is allowed.5) Assume suitable data, if necessary.

SECTION - IUnit - I

Q1) a) With the help of block diagram, explain the process of productionsystem. [8]

b) Define Operation Management and discuss the history of OperationsManagement. [8]

OR

Q2) a) Compare the types of Production system with any eight characteristics.[8]

b) Define Production, Production Management and state the objectivesof Production Management. [8]

Unit - II

Q3) a) Explain with the help of block diagram functions of ProductionPlanning and Control. [8]

b) With the help of figure explain the stages in Product Life Cycle. [8]

OR

Q4) a) Differentiate between Production Planning and Production Control.[8]b) What are the objectives of PPC? Explain the essential information

required for production planning. [8]

Unit - III

Q5) a) Define Plant Layout, Explain the factors influencing plant layout.[10]b) Consider a following assembly network relationship of a product.

maximum three tasks can be combined in one workstation

Operation Immediate Duration (Min)No. Preceding Task

1 - 3

2 A 2

3 A 5

4 B 4

5 B 8

6 C 2

7 E 4

8 G 6

i) Draw the precedence diagram [2]ii) What is the desired cycle time? [2]iii) What is the theoretical number of workstation? [2]iv) What are the efficiency and balance delay of the solution obtained?

[2]OR

Q6) a) Define Material Handling System. State the principles of MaterialHandling system. [10]

b) Explain different types of Material handling equipments with itsapplications. [8]

SECTION - IIUnit - IV

Q7) a) Define Sales forecasting. What are the short term and long termobjectives of sales forecasting? [8]

b) Calculate the trend of sales using 3 & 4 years moving average salesdata for the years as given below : [10]

Years 1985 86 87 88 89 90 91 92 93 94 95

Sales 12 15 14 16 18 17 19 20 22 25 24

Forecast the demand for the year 1996.

OR

Q8) a) Explain any two methods of Sales forecasting. [8]b) Find the coefficient of correlation between of production and sales

price for which data is as [10]

Period 1 2 3 4 5 6

Cost 100 118 130 142 160 175

Price 125 140 152 164 188 198

Unit - V

Q9) a) Explain Forward and Backward scheduling in detail. [8]b) There are seven jobs each of which has to go through the machines M1

and M2 in the order of M1M2. Processing time in hours are given as :

Jobs 1 2 3 4 5 6 7

Machine M1 3 8 7 4 9 8 7

Machine M2 4 3 2 5 1 4 3

Machine M3 6 7 5 11 5 6 12

Determine a sequence of these jobs that will minimize the total elapsedtime and idle time associated with machine M2 and machine M3. [8]

OR

Q10)a) Explain in brief steps involved in scheduling. [8]b) The activity details and their predecessors are given below along with

their activity times. Construct the network diagram and compute thecritical path. [8]

Activity Predecessors Activity Time(Weeks)

A -- 8B -- 12C -- 16D C 8

E A,B 16

F E,D 8

G D 6

H F, G 6

Unit - VI

Q11)a) Explain in short Just-in-Time (JIT) system. [8]

b) List the advanced manufacturing philosophies and explain any two of

them. [8]

OR

Q12)a) Write a short note on Lean Manufacturing. [8]

b) Explain in short Energy Audit. [8]



[4263] - 235T.E. (Production Engineering)

CUTTING TOOL ENGINEERING(2008 Pattern) (Semester - I)


1) Attempt one question of each unit from Section - I and Section - II.2) Answers to the questions should be written in separate books.3) Draw neat diagram wherever necessary.4) Assume suitable data, if required.5) Drawing could be made through proportional free hand sketches.

SECTION - IUnit - I

Q1) a) Sketch Merchants circle and explain the different equations involved.State the various assumptions made. [7]

b) During the metal cutting test under orthogonal cutting it was foundthat cutting force is 1000 N and feed force is 900 N when the cuttingat 30 m/min, the rake angle of tool is 10 degree, shear plane angle wasfound to be at 29 degree, find [8]i) Shear velocity,ii) Chip flow velocity,iii) Work done per minute in shearing the metal and work done against

friction.c) Explain chip contraction coefficient. How is the chip contraction

coefficient used to measure the degree of plastic deformation? [5]

OR

Q2) a) State the requirements of tool dynamometers. What is the basic principleon which tool dynamometers works. [7]

b) While machining C-20 steel with a triple carbide tool of 0-8-6-7-10-70-1 mm (ORS), the following forces have been recorded on a twodimensional dynamometer-cutting force 1200N, Feed force-700N,feed-0.2mm/rev, depth of cut-2mm and chip thickness 0.4mmcalculate-chip thickness ratio, shear plane angle, coefficient of friction,shear force, frictional force, specific energy of friction. [8]

c) Explain the conditions that leads to continuous chip, discontinuouschip and BUE chip formation. [5]

Unit - II

Q3) a) Describe the special features of the following tool materials and statetheir applications : [8]i) HSS,ii) Ceramics.

b) With the help of necessary diagram, illustrate the basic parts and thegeometric elements of hand reamer. [7]

OR

Q4) a) What is negative rake inserts and positive rake inserts? Explain anyone method of clamping and tooling system for external turning toolholder. [7]

b) Explain with suitable sketches following tooth characters of a facemilling cutter : [8]i) axial and radial rake angle,ii) face and peripheral relief angle,iii) face cut edge angle,iv) peripheral cut edge angle,v) chamfer.

Unit - III

Q5) a) What are the various factors which leads to maximum temperature ofcutting tool? Discuss heat dissipated by [7]i) chip,ii) tool,iii) work for a turning operation.

b) Following data were obtained for a turning operation of C-30 steelusing HSS tool [8]

i) for cutting velocity of 20m/min, tool life was 150 min,

ii) for cutting velocity of 25m/min, tool life was 30 min. find outoptimum cutting speed and corresponding tool life for minimumcost for machining operation, for k

1 = Operating cost 20 paise/

Min, K2 = Tool cost/cutting edge, 2 Rs/tool failure, tc = tool

changing time 2 min.

OR

Q6) a) What do you understand by machinability? Explain the different criteriaof measuring the machinability rating [7]

b) A 60 minute tool life was obtained while turning operation for followingdata V= cutting speed = 30 m/min, f = feed = 0.3 mm/rev, d = depthof cut = 2.5mmCalculate the change in tool life if the cutting parameters arechanged by 20% individually and also taken together. Use tool lifeequation = VT0.13 f 0.77 d0.37 = C [8]


Q7) a) Enumerate the various considerations for designing broach. Also drawa typical sketch of key way broach and show its various elements. [8]

b) Design a circular form tool graphically for following job shown in fig.1 Rake angle = 120, Relief angle = 100, Minimum chip disposalthickness = 5mm. [7]

OR

Q8) a) With neat sketch explain the various design aspect of a reamer. [7]b) Draw a neat sketch of a slab mill cutter with its nomenclature. [8]

Unit - V

Q9) a) Discuss the principle of perpendicular locating planes. [5]b) Write a short note on : [10]

i) box type of jig,ii) Economics of jig and fixture

OR

Q10)a) Write a note on : [10]i) Modular fixture,ii) different elements of jig and fixture

b) Fixed in considering the machining of component, two schemes aresuggested

i) A turning fixture costing Rs. 4000, saving 16 paise/piece onprevious method and costing Rs. 30 to setup.

ii) A milling fixture costing Rs. 6000, saving 28 paise/piece onprevious method and costing Rs. 70 to set up for above twoschemes Burdon applied on labour savedis 0.05, yearly bankinterest 10%, annual allowance for taxes and maintenance is 10%and 11% respectively, Number of pieces manufactured per year =20,000. which will be the better fixture to employ, assuming thatthe type of components is liable to change or become obsolete infour year. [5]

Unit - VI

Q11)Design a jig for drilling 2 holes of 7.5mm for a component shown infig. no. 2 [20]

OR

Q12)Design a milling fixture to mill a slot of 2.5mm for a component shown infig. no. 2. [20]Draw minimum two views of your design and, show the component inposition, name all important elements in drawing, write a part list of your

design and draw detail view for locating, clamping, and bushing.

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[4263] - 251

T.E. (Electrical Engineering)

ENGINEERING ECONOMICS & MANAGEMENT

(2008 Pattern) (Semester - I)Time : 3 Hours] [Max. Marks :100

Instructions to the candidates:

1) Answer any one question from each unit.

2) Answers to the two sections should be written in separate books.

3) Figures to the right indicate full marks.

SECTION - I

Unit - I

Q1) a) What do you mean by organisation? Distinguish between public

company & private company. [8]

b) Explain the following types of business organisation [8]

i) Private public partnership.

ii) Co-operative societys.

OR

Q2) a) Define Economics. Discuss its nature & scope. [8]

b) What is the role of Govt. in Macro. Economics. [8]

Unit - II

Q3) a) What are the various functions of management? [8]

b) Elaborate the contribution put forth by Henry fayol towards evolution

of management thoughts. [8]

OR

Q4) Explain the following terms : [16]a) ISO-standards. b) Lean Manufacturing.c) EOQ. d) Inventory Management.

Unit - III

Q5) a) What is Marketing Management? Explain the various functions ofmarketing management? [9]

b) Write a short note on : [9]i) Marketing Planning.ii) Marketing Research.

OR

Q6) a) Explain the various methods of costing. [9]b) What do you mean by Merger & Acquisition? What are the advantages

of Merger & Acquisition. [9]


Q7) a) Define Motivation. Explain Maslow theory of motivation in detail.[8]

b) Explain X & Y theory of motivation. [8]

OR

Q8) a) What is the role played by Govt. to promote Entrepreneurship culturein India. [8]

b) Explain different styles of leadership. [8]

Unit - V

Q9) a) What is Industrial Relation? Discuss scope & objectives of IndustrialRelation. [8]

b) Explain the concept of labour welfare. [8]

OR

Q10)a) What is the meaning of the term Personality? How can personality be

developed. [8]

b) Explain the following terms : [8]

i) Professional Ethics.

ii) Process of learning.

Unit - VI

Q11)a) What do you mean by Disaster Management? Explain its scope &

Importance. [9]

b) State & Explain various types of disasters. [9]

OR

Q12)Prepare a detail Disaster Management plan for Tsunami. [18]

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[4263] - 253T.E. (Electrical)

ELECTRICAL MECHINES - II(2008 Pattern) (Sem. - I)


1) Answer three questions from Section - I and three questions from Section - II.2) Answers to the two sections should be written in separate books.3) Neat diagrams must be drawn wherever necessary.4) Figures to the right indicate full marks.5) Use of logarithmic tables, slide rule, Mollier charts, electronic pocket

calculator is allowed.6) Assume suitable data, if necessary.

SECTION - I

Q1) a) What is meant by short circuit ratio in case of alternator. Elaborate its

significance. [4]b) A three phase 50 Hz 2 pole star connected alternator generates 6 kV

between lines on open circuit. It has 54 slots with 4 conductors per

slot. The pitch of the coils is less than the pole pitch by 2 slots.

Assuming sinusoidal flux distribution, find the flux per pole. [6]c) A 100 kVA 3000V, 50Hz, 3 phase star connected alternator has

effective armature resistance of 0.2. The field current of 40A producesshort circuit current of 200A and an open circuit emf of 1040V (line).

Calculate the full load voltage regulation at 0.8 lagging p.f. and 0.8

leading p.f. [8]

OR

Q2) a) Compare salient pole type construction with non salient pole type

construction in case of 3 phase alternator. [4]b) State different methods of finding voltage regulation of alternator.

Which method gives more accurate results? Why? [4]

c) A 10 kVA, 440V, 50Hz, 3 phase star connected alternator has theopen circuit characteristics as given below.

If (Amp) 1.5 3 5 8 11 15

Voc line (Volts) 150 300 440 550 600 635

with full load zero p.f., the excitation required is 14 Amp to produce500V of terminal voltage. On short circuit, 4 Amp excitation is requiredto give full load current. Determine voltage regulation at full load 0.8p.f. lagging. Neglect Ra. [10]

Q3) a) State three important features possessed by 3 phase synchronous motor.What do you mean by V curves and Inverted V curves ofsynchronous motor. [6]

b) A 10 kVA, 380V, 50Hz 3 phase star connected salient pole alternatorhas direct axis and quaderature axis synchronous reactance of 12 &8 respectively. The armature has resistance of 1 per phase. Thegenerator delivers rated load at 0.8 p.f. lagging with the terminal voltagebeing maintained at rated value. Calculate the excitation voltage ofalternator (line value). [6]

c) State necessary conditions of synchronisation of 3 phase alternators.[4]

OR

Q4) a) A 2 MVA, 3 phase 8 pole alternator is connected to 600V, 50Hzbusbar & has synchronous reactance of 4 per phase. Calculate thesynchronizing power and synchronizing torque per mechanical degreeof rotor displacement at no load. Assume normal excitation. [6]

b) A synchronous motor has synchronous reactance of 10 per phaseand negligible resistance. It takes an input power of 5 kw per phasewhen operating at 250 V per phase. Find its induced ent and angle ofretard. Assume unity power factor. [6]

c) Explain the dark lamp method used for synchronizing of alternators.[4]

Q5) a) Write a short note on 3 phase synchronous Induction Motor. [8]b) Why v/f ratio is to be kept constant for speed control of Induction

Motor. With neat circuit diagram, explain speed control of 3 phaseInduction Motor using rotor resistance control. [8]

OR

Q6) a) Write a short note on 3 phase Induction voltage regulator. [8]

b) Explain operation of 3 phase Induction motor as an induction generator.

State its advantages & applications. [8]

SECTION - II

Q7) a) What do you mean by universal motor? Compare the performance on

a.c. and d.c. supply. [6]

b) Draw the phasor diagram of a plain series motor and explain it ignoring

leakage fluxes, magnetising current and currents in short circuited

armature coils. [6]

c) What are the types of compensated series motor? Describe each with

circuit diagram. [6]

OR

Q8) a) Describe in detail the transformer and rotational e.m.fs in plain series

motor. [6]

b) What do you mean by commutation in compensated series motor?

State the methods to improve the commutation? [4]

c) Draw the circle diagram of a plain a.c. series motor and describe how

to find out motor input, torque, output & speed. [8]

Q9) a) Explain principle of operation of linear Induction motor. Draw its

characteristics. State its important applications. [8]

b) Explain the construction, working and applications of permanent

magnet type stepper motor. [8]

OR

Q10)a) Define time & space harmonics. What are their effects on an Induction

motor and synchronous generator. [8]

b) Describe the working, characteristics and applications of permanent

magnet D.C. motor. [8]

Q11)a) What are the methods to make single phase Induction motors self

starting? Explain in detail operation, characteristics & applications of

capacitor start motors. [8]

b) What are the tests to determine the parameters of a equivalent circuit of

a single phase induction motor? Draw and explain the equivalent circuit

of a single phase induction motor, without considering losses. [8]

OR

Q12)a) Explain the double revolving field theory in case of single phase

induction motor. Hence draw its torque - speed characteristics. [8]

b) A 220V, single phase induction motor gave the following tests :

Blocked rotor test : 120V, 9.6A, 460W.

No load test : 220V, 4.6A, 125W.

The stator winding resistance is 1.5 and during the blocked rotortest, the starting winding is open. Determine the equivalent circuit

parameters. Also find the core, frictional and windage losses. [8]

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[4263] - 230-AT.E. (Automobile)

VEHICLE BODY ENGINEERING(2008 Pattern) (Semester - II)


1) Answer three questions from Section I and three questions from Section II.2) Answers to the two sections should be written in separate answer books.3) Neat diagrams must be drawn wherever necessary.4) Figures to the right indicate full marks.5) Use of calculator is allowed.6) Assume suitable data, if necesaary.

SECTION - I

Q1) a) List and explain the component of aerodynamic drag. [8]b) Calculate aerodynamic drag of a car running at 70 km/h and having

frontal area 2.8 m2, dimensionless drag coefficient is 0.28, ambienttemperature is 30C and gas constant for air is 287 SI units, atmosphericpressure is 1.03 bar. [8]

OR

Q2) a) Explain with neat sketch constructional features of wind tunnel. [8]b) What are various aerodynamic forces and moments acting on vehicle

while in motion. [8]

Q3) a) Sketch five types of cars classified as per styling forms. Write twoconstructional features of each with application. [10]

b) Explain the terms visibility and blind area. [6]

OR

Q4) a) Sketch and explain typical car body nomenclature terms. [10]b) Explain various safety features you would incorporate in car body. [6]

Q5) a) Prepare a suitable layout for seating layout for luxury bus with theirfeatures. [6]

b) Explain the difference between frame and shell construction. [6]c) What factor you will consider for designing a passenger vehicle carrying

passenger within city area. [6]

OR

Q6) a) Write six difference between double deck bus and single deck bus.[6]b) What are motor rules regarding driver seats. [6]c) List four factor considered for design emergency door. [6]

SECTION - II

Q7) a) What factors you will consider for designing a commercial vehiclecarrying? [8]i) LPG gas from Mumbai to Kolhapur.ii) Milk form Pune to Mumbai.iii) Heavy unshaped component form Delhi to Mumbai.

b) List six major requirement of driver cabinet. What factor to beconsidered to design driver cab for truck. [8]

OR

Q8) a) Sketch the different types vehicle body also write their features andapplication. [8]

b) What are the different design consideration for commercial vehiclebody work? [8]

Q9) a) What is open integral structure? Explain how structure take bendingand torsion with neat diagram. [10]

b) Explain shear pannel method of structural analysis of vehicle body.[6]

OR

Q10)a) What is close integral structure? Explain how structure take bendingand torsion with neat diagram? [10]

b) Define and explain with sketches working and non-working joints.[6]

Q11)a) Write and explain safety devices which are in incorporated in the vehicle.[6]

b) What is ergonomics. How it can be applied in designing drivers seat inluxury bus. [6]

c) Explain how to obtain tensional rigidity in open structure. [6]

OR

Q12)a) Explain why and how energy absorbing system is used in automobile.[6]b) Sketch the different seat used in automobile. [6]c) Explain the any two safety system used in Automobile. [6]


[Total No. of P

t.e. (2003 & 2008 patt.)

Documents