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49530111125ANNASAHEB DANGE COLLEGE OF ENGINEERING & TECHNOLOGYDepartment of Electrical EngineeringUnit test -I Subject: Signals and SystemsClass: S.E.Academic Year: 2009-10Day & Date: Friday-29/01/2010Max. Marks: 25Instructions – All questions are compulsory Assume suitable data if necessary. Figure to right indicate full marks. Neat diagram must be drawn whenever necessary.Q 1. Define a signal. Give detailed classification of signals. (10)Q 2. What is a system? Explain the classification of systems. (10)Q 3. What is a continuous time signal? What are their different types? (5)49530111125Annasaheb Dange College of Engineering & TechnologyDepartment of Electrical EngineeringCLASS TEST-ISubject: A.C Machines Class : S.E.Academic Year: 2009 - 2010Day & Date: Monday-1/2/2010 Max. Marks: 25Instructions:1) Figures to the right indicate full marks. 2) All Questions is compulsory. Attempt any one from question no. 3Q .1 Explain the working principle & construction of three phases Induction Motor. (8)Q.2 Derive the expression for torque developed in the induction motor & state the condition for maximum torque (9) Q.3 A 3 phase slip- ring induction motor with star connected rotor has an induced e.m.f. of 120 Volt between slip ring at standstill with normal voltage applied to stator . The rotor winding have a resistance per phase 0.3 Ohm & standstill leakage reactance per phase 1.5 Ohm. Calculate a) rotor current per phase when running short circuited with 4 % slip b) The slip current per phase when rotor is developing maximum torque. (8) OR A 4 pole 3 phase induction motor operates from a supply whose frequency is 50 Hz. Calculate the speed at which the magnetic field of the stator is rotatingthe speed of the rotor when the slip is 0.04 the frequency of the rotor currents when the slip is 0.03The frequency of the rotor currents at standstill. (8) 49530111125ANNASAHEB DANGE COLLEGE OF ENGINEERING & TECHNOLOGYDepartment of Electrical EngineeringUnit test -I SUBJECT: INDUSTRAIL MANAGEMENT AND ECONOMICSClass: SE Electrical Academic Year: 2009-10Day & Date: Monday 08/02/2010Time: 4.00 pm to 5.00 pmMax. Marks: 25Instructions – 1) All questions are compulsory. 2) Figure to right indicate full marks. 3) Make suitable assumption whenever necessary.Q1. What is Management? State importance of management in industry? (8)Q2. Explain importance of Budget in industrial management? (8)Q3. What are the functions of stores department? State importance of store manager? (9) ORQ4. Explain necessity of personnel management in industry? Describe functions of personnel manager? (9)4445283845ANNASAHEB DANGE COLLEGE OF ENGINEERING & TECHNOLOGYDepartment of Electrical EngineeringClass test -I Subject: ELECTRICAL MEASUREMENTClass: S.E. ElectricalAcademic Year: 2009-10Day & Date: Tuesday / 09/02/2010Max. Marks: 25Instructions – All questions are compulsory. Assume suitable data if necessary. Figure to right indicate full marks. Neat diagram must be drawn whenever necessary. Q1) Explain the term ‘errors’ in case of measurement systems in detail.(6)Q2) A) A set of readings has a wide range and therefore it has:(4)(a) Low precision (b) high precision(c) Low accuracy (d) high accuracyB) An 0 - 10 Ammeter has a guaranteed accuracy of 1 percent of full scale Deflection. The limiting error while reading 2.5 A is:(a) 1% (b) 2%(c) 4% (d) none of the above.C) Maxwell's inductance-capacitance bridge is used for measurement of Inductance of:(a) Low Q coils (b) medium Q coils(c) High Q coils (d) low and medium Q coils.D) For the bridge shown in Fig, Z1 = 200 ? 30° ; Z2=150 ? 0° ; Z3=250? - 40° in order the bridge be balanced Z4 should be : (a) 187.5 ? – 70° (b) 187.5 ? - 10° (c) 333.3 ? 10°(d) 120 ? 70°Q3) Compare the Hay’s bridge with Maxwell’s inductance-capacitance (10) Bridge on following points:Bridge network, 2) Phasor diagram,Balance equations, 4) Q Factor.Advantages, 6) Limitations.Q4) A four branch bridge network ABCD balanced at 1000 Hz has branches AB & BC of pure resistance of l000 ? & 1250? respectively. An unknown impedance forms the arm CD and the branch DA consists of a standard capacitor of 0.1 ?F capacity and negligible resistance, connected in series with a non-inductive resistance of 10? to give balance. The supply voltage is 15 V and the supply is given at the points B and D. Find the components of unknown impedance and draw the necessary phasor diagram. (5)49530111125ANNASAHEB DANGE COLLEGE OF ENGINEERING & TECHNOLOGYDepartment of Electrical EngineeringUnit test -I Subject: Digital signals and microprocessorsClass:S.E.ElectricalAcademic Year: 2009-10Day & Date: Monday 15 /02/2010Max. Marks: 25Instructions – Assume suitable data if necessary. Figure to right indicate full marks. Neat diagram must be drawn whenever necessary. 1. Solve the following: (7) 1) (9)10=( )BCD =( )Gray 2) (1100)Gray =( )10 =( )BCD3) (0111)BCD =( )10 =( )Gray 4) (32)10 =( ) Excess-3 =( )BCD Solve the any three (6*3) 1. simplify following Boolean function by using k-map : f( A,B,C,D) =∑ m (1,3,7,11,15) +∑ d (0, 2, 4 ). 2. Simplify following Boolean function by using k-map: f ( A,B ,C,D) =π M ( 0, 2, 3, 8, 9, 12, 13, 15). 3. Draw logic diagram for BCD to Excess-3 code converter using k-map 4. Implement the following Boolean function using 8:1 MUX. F (A, B, C, D)=∑ M (0, 1, 3, 4, 8, 9, 15) .TE (Electrical) Semester – VI Tests, 2010POWER SYSTEM STATBILITY AND CONTROLDay and Date: Friday, January 29, 2010Total Marks: 25Time: 4.10 pm to 5.10 pm.Instructions: 1) Answer all the questions2) Figures to the right indicate full marks3) Make suitable assumptions wherever necessaryDraw the positive, negative and zero sequence network of An unloaded generatorA transmission lineA transformer[8]The line to ground voltages on the HV side of a step-up transformer are 100KV, 33KV and 38KV on phases R, Y and B respectively. The voltage of phase R leads that of phase Y by 100 degrees and lags that of phase B by 176.5 degrees, determine the symmetrical components of voltage. Draw the unbalanced vector and symmetrical components[9]Show that the total complex power in three phase unbalanced system is equal to the sum of complex powers of the three symmetrical components.[8]Annasaheb Dange College of Engineering & Technology, AshtaDepartment of Electrical EngineeringTest – ISubject: Control System DesignDate: 01/02/2010Class: T.E. Electrical Marks: 25Instructions: - 1) All questions are compulsory. 2) Figures to the right indicate full marks.Que.1) For a unity feedback closed loop system with open loop transfer function as G(S) =K/S(S+1) (S+2) With K as non negative sketch the root locus. (7)Que.2) Wrie a note on real axis breakaway & break-in point. (6)Que.3) Describe angle of departure and angle of arrival. (6)Que.4) Write a short note on basic rules to draw root locus. (6)49530111125ANNASAHEB DANGE COLLEGE OF ENGINEERING & TECHNOLOGYDepartment of Electrical EngineeringUnit test -ISubject: Power ElectronicsClass:T.E.ElectricalAcademic Year: 2009-10Day & Date: Monday 8/02/2010Max. Marks: 25Instructions – Assume suitable data if necessary. Figure to right indicate full marks. Neat diagram must be drawn whenever necessary. Q1. Explain protection of SCR? (6)Q2. Explain series and parallel connection in SCR? (6)Q3. Explain different modes of operation of TRIAC? (7)Q4. Draw & explain switching characteristics of SCR? (6)ORQ4. Explain working and switching characteristics of IGBT?49530111125ANNASAHEB DANGE COLLEGE OF ENGINEERING & TECHNOLOGYDepartment of Electrical EngineeringUnit test -ISubject- Microcontroller & Its ApplicationsClass:T.E. ElectricalAcademic Year: 2009-10Day & Date: Tuesday 09/02/2010Max. Marks: 25Instructions Assume suitable data if necessary. Figure to right indicate full marks. Neat diagram must be drawn whenever necessary. Q1. Explain architecture of 8051 microcontroller. (10)Q2. Explain Pin configuration of 8051 microcontroller.OR Explain Interrupt structure of 8051 microcontroller. (8) Q3. Explain PSW Register in 8051 microcontroller. (4) Q4. Fill in the blanks. (3) A) In mode 2 the counter rolls over when it from ………. to …........ B) The first opcode fetched by SP when it is power on is ….. C) The timers of 8051 microcontroller are ……..bitAnnasaheb Dange College of Engineering & Technology, AshtaDepartment of Electrical EngineeringWeekly Test -I Subject: Communication EngineeringClass: TESemester – I Academic Year: 2009-10Day & Date: Monday 15/02/2010Max. Marks: 25Instructions – Attempt any Five questions Draw neat diagrams wherever necessaryFigures to the right indicates full marksQuestions: Explain correlation function of the signalsExplain power relations in AM waveDistinguish between: Energy Signals & Power SignalsExplain the concept of Single Side band AM systemsWith the help of neat block diagram explain AM transmitterExplain VSB transmission in television systemsExplain bandwidth of FM wavesExplain wideband FM transmission (Armstrong FM transmitter)49530111125ANNASAHEB DANGE COLLEGE OF ENGINEERING & TECHNOLOGYDepartment of Electrical EngineeringUnit test -I Subject: Switchgear and protectionClass: B.E.ElectricalAcademic Year: 2009-10Day & Date: Friday 29/01/2010Max. Marks: 25Instructions – All questions are compulsory Assume suitable data if necessary. Figure to right indicate full marks. Neat diagram must be drawn whenever necessary.Q.1 Explain with suitable waveform interruption of capacitive current. (06)Q2. Write short note on (06)Transient restriking voltageRecovery voltage RRRVQ3. Explain with waveform Resistance switching (06) Q4. Explain with suitable waveform interruption of inductive current (07)ORQ4.Explain construction and working of MOCB (07) 49530111125ANNASAHEB DANGE COLLEGE OF ENGINEERING & TECHNOLOGYDepartment of Electrical EngineeringUnit test -I Subject: HVDCClass: BE Electrical Academic Year: 2009-10Day & Date: Monday,01/02/2010Max. Marks: 25Instructions – All questions are compulsory. Figure to right indicate full marks. Neat diagram must be drawn whenever necessary Q.1) State and explain a typical HVDC converter station with Schematic Sketch. (06)Q.2) Explain different kinds of HVDC links. (06)ORQ.2) Explain different HVDC projects in India. (06)Q.3) Explain basic means of control and power reversal in HVDC System. (07)Q.4) Explain the limitations of manual control. (06) 49530111125ANNASAHEB DANGE COLLEGE OF ENGINEERING & TECHNOLOGYDepartment of Electrical EngineeringUnit test -I Subject: Utilisation and energy conservationClass: B.E.Academic Year: 2009-10Day & Date: Monday 08/02/2010Max. Marks: 25Instructions – All questions are compulsory Assume suitable data if necessary. Figure to right indicate full marks. Neat diagram must be drawn whenever necessary.Q 1. Explain Main Line railway service and suburban line railway service in detail. (10) Q 2. What are typical speeds –time curves? Explain in detail. (10)Q 3. Define crest speed, average speed and scheduled speed. (5) === == 49530111125ANNASAHEB DANGE COLLEGE OF ENGINEERING & TECHNOLOGYDepartment of Electrical EngineeringUnit test -I SUBJECT: ELECTRICAL MACHINE DESIGNClass: BE Electrical Academic Year: 2009-10Day & Date: Tuesday, 09/02/2010Time: 4.00 pm to 5.00 pmMax. Marks: 25Instructions – 1) All questions are compulsory. 2) Figure to right indicate full marks. 3) Make suitable assumption whenever necessary.1. Explain various types of winding used in transformer for core type and shell type in detail? [8]2. Derive the output equation for three phase transformer with necessary assumptions? [8]3. Determine the main dimensions of the core, number of turns and cross-sectional area of the conductor for 50 Hz, 100 KVA, 2200/480V, single phase core type transformer. Assuming data: Voltage per turn =7.5v, max. Flux density =1.2 wb/sq.m., current density = 2.5 amp/sq.mm, ratio of effective cross-sectional area of core to square of diameter of circumscribing circle = 0.6, ratio of height to width of window = 2, window space factor = 0.28, yoke section is 20 % larger than core section. Use 3- stepped core? [9] ** ** ** ................
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