total no. of questions : 9] [total no. of pages : 01 · pdf filetotal no. of questions : 9]...

��Total No. of Questions : 9] [Total No. of Pages : 01

B.Tech. DEGREE EXAMINATION, MAY - 2013(Examination at the end of Fourth Year First Semester)

Electricals and Electronics Engineering(Paper - I) : INDUSTRIAL MANAGEMENT

Time : 03 Hours Maximum Marks : 75

Answer Question No.1 is compulsory and Four from remaining

All questions carry equal marks

Q1) Write short notes on :

a) Public limited company.

b) Financial ration analysis.

c) Control charts.

d) Vendor rating.

e) EPQ model.

Q2) Explain the principles of scientific management and the personnel function.

Q3) Write short notes on ‘joint stock company and private limited company’.

Q4) Discuss the methods followed to provide depreciation.

Q5) Write short notes on the following :

a) Equivalent cash flow diagram.

b) Uniform gradient series.

Q6) Explain the product analysis and value analysis.

Q7) Explain the following :

a) Acceptance sampling.

b) Reliability.

Q8) Explain the ABC analysis and source selection.

Q9) Write short notes on the following :a) Market research.b) Product life cycle.

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ELECTRICALS AND ELECTRONICS(Paper - II) : Power Systems Operation and Control


Answer Question No.1 compulsory (15 × 1 = 15)

Answer ONE question from each unit (4 × 15 = 60)

Q1) Write shrot notes on :

a) What the assumptions of Bmn

coefficients?

b) What are the units of heat rate curve?

c) Write the expression for loss coefficients.

d) What is the penalty factor?

e) Write general form of the fuel cost curve equation.

f) Define flat frequency regulation.

g) What are the main parts of a speed governing system?

h) What is the relation between Tp, T

g, T

t?

i) What are induction regulators?

j) List the advantages of TCR.

k) List the disadvantages of TSC.

l) What are the applications of STATCOM?

m) Explain the booster transformers.

n) Define shunt compensation.

o) Define static VAR compensator.

UNIT - I

Q2) a) Assuming any relevant data and notations, derive the transmission loss formula.

b) What are the costs associated with hydroplants?

OR

Q3) a) Explain the various factors to be considered in allocating generation to different powerstations for optimum operation.

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b) A power system consists of two 100MW units whose input cost data are representedby equations below :

C1 = 0.04 2

1P + 22P1 + 800 Rupees/hour

C2 = 0.045 2

2P + 15P2 + 1000 Rupees/hour. If total received power P

R = 150MW.

Determine the load division between units for most economic operation.

UNIT - II

Q4) a) Explain the necessity of maintaining a constant frequency in power system operation.

b) Explain the concept of “control area” in the load frequency control of a power system.

OR

Q5) a) With a neat block diagram explain the load frequency control for a single area system.

b) Two turbo alternators rated for 110MW have governor drop characteristics of 5%from no load to full load. They are connected in parallel to share a load of 250MW.Determine the load shared by each machine assuming free governing action.

UNIT - III

Q6) a) Explain how transformers are used to control the flow of real and reactive power inthe power system network.

b) Explain the combined use of Tap-changing transformers and reactive power injectionin a power system.

OR

Q7) a) Describe the effect of thyristor - controlled static shunt compensators to meet reactivepower requirement in the power systems.

b) Compare the technical advantages of static compensator over synchronous condenser.

UNIT - IV

Q8) Briefly explain the evolution of power system control technology.

OR


a) Energy control center.

b) Power system control center.

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Electricals and Electronics Engineering(Paper - III) : INDUSTRIAL DRIVES



Answer One question from each unit (4 × 15 = 60)

Q1) Write briefly on the following :

a) What is electric drive?

b) What are the advantages of electric drive?

c) What are the compononents of electric drive?

d) What is cycloconverter?

e) List out any two differences between active and passive load torque.

f) Why is starting method required for DC motor?

g) What are the classification of load torques?

h) What are the advantages of armature voltage control?

i) Explain the rectifier control.

j) Define pole amplitude modulation.

k) Explain Eddy current drives.

l) Draw the schematic of VSCF generation using would rotor machine and cycloconverter.

m) What are the two modes of variable frequency control?

n) Explain slip power recovery.

o) List out the advantages of Ward - Leonard schemes.

UNIT - I

Q2) a) Explain the types of electric drives.

b) Write short notes on status of dc and ac drives.

OR

Q3) a) Explain the modes of operation in electric drives.

b) Write short notes on equivalent values of drive parameters.

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UNIT - II

Q4) a) A 200 V, 10.5A, 2000 rpm shunt motor has the armature and field resistances of 0.5and 400 n respectively. It drives a load whole torque is constant at rated motor torque.Calculate motor speed if the source voltage drops to 170 V.

b) Explain the methods of armature voltage control.

OR

Q5) a) Briefly discuss the comparison of Conventional and static Ward-Leonard schemes.

b) Explain the rectifier control of dc series motor.

UNIT - III

Q6) a) Discuss any three starting methods of induction motor drives.

b) Explain the stator voltage control.

OR


a) Operation with unbalanced source voltages.

b) Operation with unbalanced rotor impedances.

UNIT - IV


a) Synchronous variable speed drives.

b) Braking of synchronous motor.

OR


a) Switched reluctance motor.

b) Brush less dc motors.

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B.Tech. DEGREE EXAMINATION, MAY - 2013(Examination at the end of IVth Year First Semester)

ELECTRICALS & ELECTRONICS ENGINEERING(Paper - IV) : Power System Analysis and Stability




Q1) a) What is the meaning of one line diagram of a power system?

b) What is the relation between percentage value and per unit value?

c) What is reactance diagram?

d) What are the advantages of interconnecting power systems?

e) What are the assumptions made in drawing reactance diagram?

f) Give the formula to get the p.u. impedance value.

g) Define bus impedance matrix.

h) What is the purpose of digital simulation?

i) What are the applications of bus impedance matrix?

j) Define stability.

k) What is doubling effect?

l) Name the diagonal elements and off-diagonal elements of zbus

.

m) Name any two methods of reducing short circuit current.

n) What are symmetrical components.

o) Why prefault current is not considered for unsymmetrical fault analysis?

UNIT - I

Q2) a) Explain the advantages of the p.u. form of representation.

b) Explain briefly the representation of loads.

OR

Q3) a) Explain the steps to be followed to draw the p.u. inpedance diagram.

b) Two generators rated at 10MVA, 13.2kV and 15MVA, 13.2kV are connected inparallel to a busbar. They feed supply to two motors of input 8MVA, and 12MVArespectively. The operating voltage of motors is 12.5kV. Assuming base quantities as50 MVA and 13.8kV, draw the reactance diagram. The percentage reactance forgenerators is 15% and that for motors is 20%.

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UNIT - II

Q4) Prove that when there is no mutual coupling, the diagonal and off-diagonal elements of thebus admittance matrix y

bus can be computed from

∑=j

ijyiiy

ijyijy −=

OR

Q5) a) Derive the expressions for static load flow equations.b) Form the y

bus by inspection for a 4 bus system, if the line series impedances are as

given

Line (bus to bus) Impedance1 - 2 0.15 + j 0.6 pu1 - 3 0.1 + j 0.4 pu1 - 4 0.15 + j 0.6 pu2 - 3 0.05 + j 0.2 pu3 - 4 0.05 + j 0.2 pu

UNIT - III

Q6) a) What are various types of faults? Discuss their frequency of occurrence and severity.b) Derive an expression for the fault current for a line to ground fault.

OR

Q7) a) Explain why the sequence impedances are different for synchronous machines andnot for transformers.

b) A positive, negative and two sequence components of line currents are 20∠10º,

6∠60º and 3∠30º amperes respectively. Determine the three line currents assuming

i) Phase sequence abc.ii) Phase sequence acb.

UNIT - IV

Q8) a) Derive swing equation for a single machine connected to infinite bus system. State theassumptions if any and state the usefulness of this equation.

b) State the bad effects of instability. Distinguish between steady state and transient stabilities.OR

Q9) a) Write short notes on the assumptions made in deducing equal area criterion and validityof the assumptions.

b) A 50Hz, 4 pole turbo generator rated 20MVA, 11 kV has an inertia constant ofH = 9 kW-sec/kVA. Find the kinetic energy stored in the rotor at synchronous speed.Find the acceleration, if the input less the rotational losses is 26800HP and the electricalpower developed is 16MW.

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Total No. of Questions : 9] [Total No. of Pages : 02

B.Tech. (Semester - I) DEGREE EXAMINATION, MAY - 2013(Examination at the end of Fourth Year)

ELECTRICALS AND ELECTRONICS ENGINEERING(Paper - V) : ELECTRICAL MACHINE DESIGN



Answer any ONE question from each unit (4 × 15 = 60)

Q1) a) Define distribution factor.

b) Define pitch factor.

c) Define specific magnetic loading.

d) What is square pole criterion?

e) Define space factor.

f) Define volt per turn.

g) What is range efficiency of a transformer?

h) Write the expression for output equation of a induction motor.

i) Write the expression for output equation of a synchronous machines.

j) What are the materials used for sliprings in induction motor.

k) What are the two types of poles used in salient pole machine.

l) What are the materials used for armature windings in dc machines?

m) What is sllewing?

n) How the slipring motor is started?

o) What is the importance of main dimension for 3% transformers?

UNIT - I

Q2) a) Derive the expression for emf generated in a dc machines.

b) Write short notes on design of armature windings.

OR


a) Design of field system.

b) Design of interpole and commulator.

UNIT - II

Q4) a) Derive the expression for output equation of transformer.

b) Derive the expressions for main dimensions of a single phase transformer.

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OR


a) Yoke design and coil design.

b) Design of tank with tubes.

UNIT - III

Q6) a) Derive the expressions for main dimentions of a Induction motor.

b) Explain the rotor design for squirrel case motor.

OR

Q7) a) Explain the stator design and number of slots of a Induction motor.

b) Estimate the main dimensious, aiv gap length, stator slots, stator turns phase and crosssectional area of stator and rotor conductors for a 34, 110kW, 3300V, 50Hz, 10 poles,600 rpm induction motor. B

av = 0.48 wb/m2, ac = 2800, L/T = 1.25, n = 0.9, pt = 0.86.

UNIT - IV

Q8) Briefly discuss the flow chart for computer aided design and advantage of computer aideddesign.

OR

Q9) a) Explain the pole design for salient pole generators.

b) Write short notes an design of rotor windings.

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B.Tech. DEGREE EXAMINATION, MAY - 2013(Examination at the end of Fourth Year first Semester)

ELECTRICALS AND ELECTRONICS ENGINEERING(Paper - VI) : HVDC Transmission




Q1) Write briefly on the followinga) What are types of DC links?b) Write the expression for transient reliability.c) Write the block diagram of HVDC system.d) Draw the schematic of bipolar configuration.e) Define surge arresters.f) Define short circuit current.g) Write the expression for DC power in a converter.h) What the reactive power requirements in steady state?i) Explain the firing angle control.j) What is telephone harmonic form factor?k) Draw the schematic of a DC converter.l) Explain the impedance loci.m) Draw the block diagram of auxiliary controller.n) Define the radio interference (RI).o) During power reversal the operating point lies in which quadrant.

UNIT - I

Q2) a) What are the different applications of D.C.Transmission system? Explain them indetail.

b) With neat sketches explain the different kinds of DC links available.

OR

Q3) a) Explain modern trends in DC transmission.

b) Write technical notes on Back-Back DC link along with AC feeder.

UNIT - II

Q4) Draw a schematic of a 6-pulse converter circuit and derive from fundamentals, the expressionfor voltage and currents for the operation of converter as a rectifier and inverter with relevantwave forms.

OR

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Q5) a) Explain the short circuit currents in rectifier and inverter.

b) Find the effective commutation resistance of a 6-pulse rectifier which is fed from400kV, 3-4 AC supply when the dc current in HVDC link is 1KA, and the rectifier dcvoltage is 500kV at firing angle of 20º.

UNIT - III

Q6) a) Explain the converter control characteristics with the help of neat diagram.

b) Explain firing angle control schemes with their relative merits and demerits.

OR

Q7) a) Explain in detail, the concept of reactive power requirement in HVDC converters.

b) Explain why the inverter end requires higher reactive power supply than the rectifierend?

UNIT - IV

Q8) a) Classify the solution methodology for AC-DC load flow and explain.

b) Obtain a mathematical model of a DC link.

OR


a) Pulse number.

b) Order of Harmonics.

c) Characteristics harmonics.

d) Non-characteristic harmonics.

e) Assumptions of characteristic harmonics.

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��Total No. of Questions : 5] [Total No. of Page : 01


ELECTRICALS AND ELECTRONICS ENGINEERING(Paper - VI) : Fuzzy Logic and Application


Answer Question No.1 compulsory (15)


Q1) a) What are the types of fuzzy neural nets? (3)b) What is neuro-fuzzy system? (2)c) What are the compenents of a fuzzy system? (3)d) What is fuzzy tautologies? (2)e) What is multiobjective decision making? (3)f) What is fuzzy ordering? (2)

UNIT - IQ2) a) What are the types of fuzzification?

b) Discuss inductive reasoning.OR

a) Explain fuzzy arithmetic.b) Discuss DSW algorithm.

UNIT - IIQ3) a) Discuss the mapping of classical sets to the functions.

b) Explain crisp relations.OR

a) Discuss about fuzzy relations.b) Discuss tolerance and equivalence relations.

UNIT - IIIQ4) a) Explain classical predicate logic-tautologies.

b) Explain graphical techniques interference.OR

a) Discuss decomposition of compound rules.b) Explain aggregation of fuzzy rules.

UNIT - IVQ5) a) Explain multi objective decision making.

b) Discuss decision making under fuzzy states and fuzzy actions.OR

a) Explain in detail about crisp relations.b) Explain in detail about cluster validity.

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B.Tech. DEGREE EXAMINATION, MAY - 2013(Examination at the end of Fourth Year Sixth Semester)

Electricals and Electronics Engineering(Paper - I) : ELECTRICAL POWER DISTRIBUTION SYSTEM ENGG




Q1) a) Define utilization factor.

b) Define loss factor.

c) Define coincidence factor.

d) Write a relationship between the load factor and loss factor.

e) What information can obtained from the load duration curve?

f) What is meant by load forecasting?

g) What is distribution system?

h) Define efficiency.

i) List out any two disadvantages of Rius Bus Scheme.

j) What are the advantages and KW-KVA method of determining regulation.

k) What is transformer load management?

l) What do you mean by co-ordination of protective devices?

m) Explain quality of service.

n) Define voltage regulation.

o) Define power factor.

UNIT - I

Q2) a) Explain the various factors affecting the distribution system planning.

b) Discuss the effect of load factor on the cost of generation in a power system.

OR

Q3) Draw a schematic single line diagram of the electrical power system and explain its typicalparts in detail.

UNIT - II

Q4) a) Explain the KW-KVA method of determining regulation of a distribution transformer.

b) Explain the use of monograms for obtaining efficiency.

OR

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B.Tech. DEGREE EXAMINATION, MAY - 2013(Examination at the end of Fourth Year Sixth Semester)

ELECTRICALS AND ELECTRONICS ��(Paper - II) : ��



Answer any ONE question from each unit (4 × 15 = 60)

Q1) a) Define the impulse voltages.

b) Define impulse flashover voltage.

c) Define impulse puncture voltage.

d) What is the application area of impulse generator?

e) Explain wave shape control resistors.

f) Explain the energy of impulse generator.

g) What are the advantages of Cock�� Walton cascade arrangement?

h) Define Tesla coil.

i) Define resonant transformers.

j) What is the reason for the use of fibre optics in HV measurement?

k) What are the advantages of voltage dividers?

l) What is the function of high speed oscilloscope?

m) What is the purpose of bushings?

n) What are the conditions for testing of insulators?

o) What is the function of CB?

UNIT - I

Q2) a) Explain with neat diagram triggering and synchronisation of the impulse generatorwith the CRO.

b) Describe the construction of various components used in the development of an impulsegenerator.

OR

Q3) a) Describe the construction, principle of operation and application of multistage impulsegenerator.

b) Describe the principle of operation of Cock Craft - Walton cascade arrangement.

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UNIT - II

Q4) a) Explain the general concepts of high voltage measurements.

b) Write short notes on high speed oscilloscope.

OR

Q5) a) Describe the layout of high voltage lab.

b) An absolute electrostatic voltmeter has a movable circular plate 8cms in diameter. Ifthe distance between the plates during a measurement is 4mm, determine the potentialdifference when the force of attraction is 0.2 gmwt.

UNIT - III

Q6) a) Explain briefly various tests to be carried out on a bushing.

b) Describe various tests to be carried out on a C.B.

OR

Q7) a) Explain the testing of insulators.

b) Explain the fault detection using wave lets.

UNIT - IV

Q8) Explain the finite difference method and finite element method.

OR

Q9) Explain the charges simulation methods and boundary element methods.

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B.Tech. DEGREE EXAMINATION, MAY - 2013(Examination at the end of IVth Year Sixth Semester)

ELECTRICALS & ELECTRONICS ENGINEERING(Paper - III) : Computer Aided Power System Analysis




Q1) a) Define co-tree.

b) Define loop.

c) Define basic cutsets.

d) Explain non-singular transformation.

e) What is a primitive impedance?

f) How do short circuits occur on a power system?

g) Distinguish between symmetrical and unsymmetrical short circuits.

h) Define short circuit MVA capacity of a circuit breaker.

i) Name any two iterative methods used for the solution of load flow problems.

j) State Gauss - Seidal load flow formula.

k) What is a Jacobian matrix?

l) What is the necessity for slack bus?

m) Mention the items specified in a p - ybus

.

n) Define steady state stability.

o) State one merit of equal area criterian.

UNIT - I

Q2) a) Explain the sparsity of power system networks.

b) Develop the relation between bus admittance matrix, bus incidence matrix and primitiveadmittance matrix.

OR

Q3) a) Explain the formulation of ybus

by singular transformation.

b) Prove that when there is no mutual coupling, the diagonal and if-diagonal elements ofthe bus admittance matrix y

bus can be computed from

,y yii ij y yj ij ij=∑ =−

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UNIT - II

Q4) a) Explain the need for short circuit studies.

b) What is the effect of earthing through an impedance on the zero sequence impedances?Does it affect the other sequence impedances. Explain why?

OR

Q5) Find the fault current when an L-L-G fault occurs at the terminals of an unloaded generator.

UNIT - III

Q6) Derive the static load flow equations of a power system. Explain the Newton-Raphsonmethod of solving the load flow equations.

OR

Q7) a) Discuss the classification of buses.

b) Compare GS and NR methods.

UNIT - IV

Q8) Derive swing equation for a single machine connected to infinite bus system. State theassumptions if any and state the usefulness of this equations. Damping is not to be neglected.State the reasons for non-linearity of this equation.

OR

Q9) a) Discuss briefly the various factors the transient stability of the system.

b) Explain the flowchart for digital simulation of transient stability problem.

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B.Tech. DEGREE EXAMINATION, MAY - 2013(Examination at the end of IVth Year Sixth Semester)

ELECTRICALS & ELECTRONICS ENGINEERING(Paper - IV) : Embedded Systems & VLSI


Answer Question No.1 compulsory (15)


Q1) a) Define an embedded system. (2)

b) What is the advantage of wait instruction. (2)

c) What role does a linker play? (2)

d) What do you mean by virtual device? (2)

e) How is power dissipation is optimized? (2)

f) What is a dealy time? (2)

g) What is a stick diagram? (2)

h) What is a PLA? (1)

UNIT - I

Q2) a) Explain about RT-level sequential logic.

b) Give the basic architecture of pipelining and explain its operation?

OR

Q3) a) Write short notes on ASITPS.

b) How the DSP differ from a general purpose processor?

UNIT - II

Q4) a) Explain the sheet resistance and dealy unit.

b) What are layout design rules of CMOS circuit?

OR

Q5) a) What are the basic electrical properties of MOS and BIMOS circuits?

b) Explain about scaling of MOS circuits.

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UNIT - III

Q6) a) Explain the nature of approach to strured design is to work with example.

b) Draw the stick diagram of nMOS and CMOS 3-input NAND gate.

OR

Q7) a) Explain the features of FPGAS?

b) Write a short notes on gate logic.

UNIT - IV

Q8) a) Explain about RTI synthesis?

b) Write a short notes on Hardware/Software co-simulation?

ORQ9) a) Discuss about system synthesis.

b) Explain about parallel evolution of compilation and synthesis.

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total no. of questions : 9] [total no. of pages : 01 · pdf filetotal no. of questions : 9]...

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