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

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1 (DEE411) Total No. of Questions : 9] [Total No. of Pages : 01 (Examination at the end of Fourth Year First Semester) Electricals and Electronics Engineering (Paper - I) : INDUSTRIAL MANAGEMENT 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. llll N-3133

2 (DEE412) Total No. of Questions : 9] [Total No. of Pages : 02 (Examination at the end of Fourth Year First Semester) 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 B mn 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 T p, 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. Q2) a) Assuming any relevant data and notations, derive the transmission loss formula. b) What are the costs associated with hydroplants? Q3) a) Explain the various factors to be considered in allocating generation to different power stations for optimum operation. N-3144 P.T.O.

3 (DEE412) b) A power system consists of two 100MW units whose input cost data are represented by equations below : C 1 = 0.04 P P Rupees/hour 1 C 2 = P P Rupees/hour. If total received power P R = 150MW. Determine the load division between units for most economic operation. I 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. 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. II Q6) a) Explain how transformers are used to control the flow of real and reactive power in the power system network. b) Explain the combined use of Tap-changing transformers and reactive power injection in a power system. Q7) a) Describe the effect of thyristor - controlled static shunt compensators to meet reactive power requirement in the power systems. b) Compare the technical advantages of static compensator over synchronous condenser. V Q8) Briefly explain the evolution of power system control technology. Q9) Write short notes on the following : a) Energy control center. b) Power system control center. llll N

4 (DEE413) Total No. of Questions : 9] [Total No. of Pages : 02 (Examination at the end of Fourth Year First Semester) Electricals and Electronics Engineering (Paper - III) : INDUSTRIAL DRIVES Answer Question No.1 compulsory (15 1 = 15) 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. Q2) a) Explain the types of electric drives. b) Write short notes on status of dc and ac drives. Q3) a) Explain the modes of operation in electric drives. b) Write short notes on equivalent values of drive parameters. N-3145 P.T.O.

5 I (DEE413) Q4) a) A 200 V, 10.5A, 2000 rpm shunt motor has the armature and field resistances of 0.5 and 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. Q5) a) Briefly discuss the comparison of Conventional and static Ward-Leonard schemes. b) Explain the rectifier control of dc series motor. II Q6) a) Discuss any three starting methods of induction motor drives. b) Explain the stator voltage control. Q7) Write short notes on the following : a) Operation with unbalanced source voltages. b) Operation with unbalanced rotor impedances. V Q8) Write short notes on the following : a) Synchronous variable speed drives. b) Braking of synchronous motor. Q9) Explain the following : a) Switched reluctance motor. b) Brush less dc motors. llll N

6 (DEE414) Total No. of Questions : 9] [Total No. of Pages : 02 (Examination at the end of IV th Year First Semester) ELECTRICALS & ELECTRONICS ENGINEERING (Paper - IV) : Power System Analysis and Stability Answer Question No.1 compulsory (15 1 = 15) Answer One question from each unit (4 15 = 60) 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 z bus. 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? Q2) a) Explain the advantages of the p.u. form of representation. b) Explain briefly the representation of loads. 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 in parallel to a busbar. They feed supply to two motors of input 8MVA, and 12MVA respectively. The operating voltage of motors is 12.5kV. Assuming base quantities as 50 MVA and 13.8kV, draw the reactance diagram. The percentage reactance for generators is 15% and that for motors is 20%. N-3146 P.T.O.

7 I N (DEE414) Q4) Prove that when there is no mutual coupling, the diagonal and off-diagonal elements of the bus admittance matrix y bus can be computed from y ii = yij j yij = y ij 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) Impedance j 0.6 pu j 0.4 pu j 0.6 pu j 0.2 pu j 0.2 pu II 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. Q7) a) Explain why the sequence impedances are different for synchronous machines and not 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. V Q8) a) Derive swing equation for a single machine connected to infinite bus system. State the assumptions if any and state the usefulness of this equation. b) State the bad effects of instability. Distinguish between steady state and transient stabilities. Q9) a) Write short notes on the assumptions made in deducing equal area criterion and validity of the assumptions. b) A 50Hz, 4 pole turbo generator rated 20MVA, 11 kv has an inertia constant of H = 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 electrical power developed is 16MW. xxxx

8 Total No. of Questions : 9] [Total No. of Pages : 02 B.Tech. (Semester - I) DEGREE EXAMINATION, MAY (Examination at the end of Fourth Year) ELECTRICALS AND ELECTRONICS ENGINEERING (Paper - V) : ELECTRICAL MACHINE DESIGN 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. Answer Question No.1 compulsory (15 1 = 15) Answer any ONE question from each unit (4 15 = 60) 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? (DEE415) Q2) a) Derive the expression for emf generated in a dc machines. b) Write short notes on design of armature windings. Q3) Write short notes on the following : a) Design of field system. b) Design of interpole and commulator. I Q4) a) Derive the expression for output equation of transformer. b) Derive the expressions for main dimensions of a single phase transformer. N-3147 P.T.O.

9 Q5) Write short notes on the following : a) Yoke design and coil design. b) Design of tank with tubes. II Q6) a) Derive the expressions for main dimentions of a Induction motor. b) Explain the rotor design for squirrel case motor. 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 cross sectional area of stator and rotor conductors for a 34, 110kW, 3300V, 50Hz, 10 poles, 600 rpm induction motor. B av = 0.48 wb/m 2, ac = 2800, L/T = 1.25, n = 0.9, pt = V Q8) Briefly discuss the flow chart for computer aided design and advantage of computer aided design. Q9) a) Explain the pole design for salient pole generators. b) Write short notes an design of rotor windings. xxxx N

10 (DEE416/B) Total No. of Questions : 9] [Total No. of Pages : 02 (Examination at the end of Fourth Year first Semester) ELECTRICALS AND ELECTRONICS ENGINEERING (Paper - VI) : HVDC Transmission Answer Question No.1 compulsory (1 15 = 15) Answer ONE question from each unit (4 15 = 60) Q1) Write briefly on the following a) 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. Q2) a) What are the different applications of D.C.Transmission system? Explain them in detail. b) With neat sketches explain the different kinds of DC links available. Q3) a) Explain modern trends in DC transmission. b) Write technical notes on Back-Back DC link along with AC feeder. I Q4) Draw a schematic of a 6-pulse converter circuit and derive from fundamentals, the expression for voltage and currents for the operation of converter as a rectifier and inverter with relevant wave forms. N-3148 P.T.O.

11 (DEE416/B) 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 from 400kV, 3-4 AC supply when the dc current in HVDC link is 1KA, and the rectifier dc voltage is 500kV at firing angle of 20º. II 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. 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 rectifier end? V Q8) a) Classify the solution methodology for AC-DC load flow and explain. b) Obtain a mathematical model of a DC link. Q9) Explain the following : a) Pulse number. b) Order of Harmonics. c) Characteristics harmonics. d) Non-characteristic harmonics. e) Assumptions of characteristic harmonics. xxxx N

12 (DEE416/D) Total No. of Questions : 5] [Total No. of Page : 01 (Examination at the end of Fourth Year First Semester) ELECTRICALS AND ELECTRONICS ENGINEERING (Paper - VI) : Fuzzy Logic and Application Answer Question No.1 compulsory (15) Answer ONE question from each unit (4 15 = 60) 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) Q2) a) What are the types of fuzzification? b) Discuss inductive reasoning. a) Explain fuzzy arithmetic. b) Discuss DSW algorithm. I Q3) a) Discuss the mapping of classical sets to the functions. b) Explain crisp relations. a) Discuss about fuzzy relations. b) Discuss tolerance and equivalence relations. II Q4) a) Explain classical predicate logic-tautologies. b) Explain graphical techniques interference. a) Discuss decomposition of compound rules. b) Explain aggregation of fuzzy rules. V Q5) a) Explain multi objective decision making. b) Discuss decision making under fuzzy states and fuzzy actions. a) Explain in detail about crisp relations. b) Explain in detail about cluster validity. llll N-3149

13 (DEE421) Total No. of Questions : 9] [Total No. of Pages : 02 (Examination at the end of Fourth Year Sixth Semester) Electricals and Electronics Engineering (Paper - I) : ELECTRICAL POWER DISTRIBUTION SYSTEM ENGG Answer Question No.1 compulsory (15 1 = 15) Answer One question from each unit (4 15 = 60) 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. 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. Q3) Draw a schematic single line diagram of the electrical power system and explain its typical parts in detail. I Q4) a) Explain the KW-KVA method of determining regulation of a distribution transformer. b) Explain the use of monograms for obtaining efficiency. N-3150 P.T.O.

14 (DEE422) Total No. of Questions : 9] [Total No. of Pages : 02 (Examination at the end of Fourth Year Sixth Semester) ELECTRICALS AND ELECTRONICS ENGINEERING (Paper - II) : High Voltage Engineering Answer Question No.1 compulsory (1 15 = 15) 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 Cockcraft 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? Q2) a) Explain with neat diagram triggering and synchronisation of the impulse generator with the CRO. b) Describe the construction of various components used in the development of an impulse generator. Q3) a) Describe the construction, principle of operation and application of multistage impulse generator. b) Describe the principle of operation of Cock Craft - Walton cascade arrangement. N-3151 P.T.O.

15 I (DEE422) Q4) a) Explain the general concepts of high voltage measurements. b) Write short notes on high speed oscilloscope. Q5) a) Describe the layout of high voltage lab. b) An absolute electrostatic voltmeter has a movable circular plate 8cms in diameter. If the distance between the plates during a measurement is 4mm, determine the potential difference when the force of attraction is 0.2 gmwt. II 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. Q7) a) Explain the testing of insulators. b) Explain the fault detection using wave lets. V Q8) Explain the finite difference method and finite element method. Q9) Explain the charges simulation methods and boundary element methods. llll N

16 (DEE423) Total No. of Questions : 9] [Total No. of Pages : 02 (Examination at the end of IV th Year Sixth Semester) ELECTRICALS & ELECTRONICS ENGINEERING (Paper - III) : Computer Aided Power System Analysis Answer Question No.1 compulsory (15 1 = 15) Answer ONE question from each unit (4 15 = 60) 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 - y bus. n) Define steady state stability. o) State one merit of equal area criterian. Q2) a) Explain the sparsity of power system networks. b) Develop the relation between bus admittance matrix, bus incidence matrix and primitive admittance matrix. Q3) a) Explain the formulation of y bus by singular transformation. b) Prove that when there is no mutual coupling, the diagonal and if-diagonal elements of the bus admittance matrix y bus can be computed from yii = y j ij, y = y ij ij N-3152 P.T.O.

17 I (DEE423) 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? Q5) Find the fault current when an L-L-G fault occurs at the terminals of an unloaded generator. II Q6) Derive the static load flow equations of a power system. Explain the Newton-Raphson method of solving the load flow equations. Q7) a) Discuss the classification of buses. b) Compare GS and NR methods. V Q8) Derive swing equation for a single machine connected to infinite bus system. State the assumptions if any and state the usefulness of this equations. Damping is not to be neglected. State the reasons for non-linearity of this equation. Q9) a) Discuss briefly the various factors the transient stability of the system. b) Explain the flowchart for digital simulation of transient stability problem. llll N

18 (DEE424/1) Total No. of Questions : 9] [Total No. of Pages : 02 (Examination at the end of IV th Year Sixth Semester) ELECTRICALS & ELECTRONICS ENGINEERING (Paper - IV) : Embedded Systems & VLSI Answer Question No.1 compulsory (15) Answer ONE question from each unit (4 15 = 60) 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) Q2) a) Explain about RT-level sequential logic. b) Give the basic architecture of pipelining and explain its operation? Q3) a) Write short notes on ASITPS. b) How the DSP differ from a general purpose processor? I Q4) a) Explain the sheet resistance and dealy unit. b) What are layout design rules of CMOS circuit? Q5) a) What are the basic electrical properties of MOS and BIMOS circuits? b) Explain about scaling of MOS circuits. N-3153 P.T.O.

19 II (DEE424/1) 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. Q7) a) Explain the features of FPGAS? b) Write a short notes on gate logic. V Q8) a) Explain about RTI synthesis? b) Write a short notes on Hardware/Software co-simulation? Q9) a) Discuss about system synthesis. b) Explain about parallel evolution of compilation and synthesis. llll N

20 (DEE 424/2) Total No. of Questions : 5] [Total No. of Pages : 02 (Examination at the end of IVth Year Sixth Semester) Electricals & Electronics Engineering (Paper - IV) : ARTIFICIAL NEURAL NETWKS Answer Question No.1 Compulsory (15 1 = 15) Answer One question from each Unit (4 15 = 60) Q1) a) What is Neural computing? b) Define Artificial Neural Network. c) What are the advantages of Artificial Neural Networks? d) What are the application areas of Artificial Neural Networks? e) What is Leniar separability? f) What is 2-of-3 detector? g) What is perception? h) What is X problem? i) What is Cross validation? j) What is vector quantization? k) What is contextual map? l) What is clustering? m) What is metropolis algorithm? n) How the Artificial neural networks are useful in medicine? o) What is optimization. Q2) a) Explain in detail about Neuron models. b) Write short notes on Error Correction learning. a) Explain Competitive learning. b) Explain in detail about statistical learning theory. I Q3) a) Explain Adaptive filtering problem. b) Discuss learning curves. a) Explain back propagation algorithm. b) Explain Hessian matrix. N-3154 P.T.O.

21 II Q4) a) Explain self-organizing maps. b) Discuss the properties of feature map. a) Discuss about RBF networks. b) Explain Annealing techniques V Q5) a) Explain SOM algorithm. b) Discuss the applications of ANN in Image Processing. a) Explain contextual maps. b) Explain Associative memories. (DEE 424/2) ïïï N

B.E. / B.Tech. Degree Examination, April / May 2010 Sixth Semester. Electrical and Electronics Engineering. EE 1352 Power System Analysis

B.E. / B.Tech. Degree Examination, April / May 2010 Sixth Semester Electrical and Electronics Engineering EE 1352 Power System Analysis (Regulation 2008) Time: Three hours Answer all questions Part A (10