Bh.Questionbanks  Electrical 
Brainheaters Questionbanks (Semester Exam) is the collection of handpicked set of questions which are mostly repeated, important and recommended. Learning this set of questions can easily help you top or even just clear the exams. Given below are Expected Questionbanks for semester.
Semester 5CSI
MODULE1 1. Brief idea of multi variable control system (5M) 2. Compare open loop and closed loop control systems with the help of suitable example. (5M) MODULE2 1. Explain the following rules with suitable examples I) Blocks in series II) Blocks in parallel (5M) 2. Write the Numerical for Obtain the differential equations and transfer function describing the mechanical system shown in figure and also draw its electric network. (10M) 3. Write the Numerical for Find the transfer function C(s)/R(s) for the signalflow graph in figure. (10M) 4. Write the Numerical for Convert given block diagram into signal flow graph and obtain transfer function (given) using Mason’s rule. (10M) MODULE3 1. Explain RouthHurwitz criteria of stability with suitable example. (5M) 2. Write a short note on: Time response specifications. (10M) 3. Write the Numerical for The unity feedback system is characterized by an open loop transfer function (Given) (10M) 4. Write the Numerical for Find the transfer function relating the capacitor voltage. 5. Derive the formula for rise time, peak time, setting time and percentage overshoot for a second order system. (10M) 6. Write the Numerical for A unity feedback system has an openloop transfer function (Given) Plot Nyquist diagram and using your diagram find the range of gain K for stability. (10M) 7. Write the Numerical for The characteristic equation of a feedback control system(Given) (10M) 8. Write the Numerical for Evaluate the static error constants for the following system and find the expected error for the standard step, ramp, and parabolic inputs.(10M) MODULE4 1. What are the advantages of using state space analysis over classical control approaches? (5M) 2. Define (i) Satte (ii) State variable (iii) state vector (iv) State space. How to obtain the state variable form from transfer function? (10M) 3. Write the Numerical for Obtain the state representation in phase variable form of the following transfer function. (Given) Also draw state space model. (10M) 4. Write the Numerical for Represent the given system in cascade form of state space representation. Also draw SFG. (5M) 5. Find the transfer function (Given) for the translational mechanical network shown (5M) 6. Write the Numerical for Given the system represented in state space. 7. Write the Numerical for Obtain Laplace transform solution of the following system. (10M) MODULE5 1. Write the Numerical for Sketch the root locus of a unity feedback system having (Given) (10M) 2. Explain Angle and Magnitude condition. Also explain the steps to find intersection points of root locus with imaginary axis. (10M) 3. Write the Numerical for A unity feedback system has an openloop transfer function (Given) Sketch the root locus. (10M) MODULE6 1. What is Nyquist stability criteria? (5M) 2. Write the Numerical for For the unity feedback control system (Given) Sketch the bode plot. Also determine GM, PM, gain and phase crossover frequencies. (10M) 3. Write the Numerical for Discuss the stability of system using Nyquist plot for (Given)(10M) 4. Write the Numerical for Sketch the polar plot of the transfer function (Given) (5M) 5. Write the Numerical for Draw Bode plot for the following unity feedback system (510M) EMIII
MODULE1 1. How a rotating magnetic field is created in a 3 phase induction motor? (5M) 2. Draw torquespeed characteristics of 3 phase induction motor in braking, motoring and generating regions. (5M) 3. Write the Numerical for Torquespeed characteristics in braking. (5M) 4. Illustrate with neat diagrams the working principle of 3 phase induction motor. (10M) 5. Draw the equivalent circuit of 3phase induction motor and state the relevance of each parameter. Write the equation for the mechanical power developed. (10M) 6. Illustrate with speed torque characteristics the V/f control of induction motor. (10M) 7. What is the objective of performing no load and blocked rotor test on 3 phase induction motor? (5M) 8. Explain the effect of frequency and voltage variation on Induction motor performance. (10M) 9. Derive Equivalent circuit diagram of 3phase induction motor. (10) 10. Write the Numerical for No load and block rotor test (10M) 11. Write the Numerical for Applications of 3Φ IM MODULE2 1. Illustrate working of star delta starter with neat diagram. State its function. (10M) 2. Why do we need to apply reduced voltage at the time of starting of 3phase Induction motor? (5M) 3. Cogging and crawling in 3phase induction motor. (10M) MODULE3 1. Ilustrate double field revolving theory of single phase induction motor and hence prove that single phase induction motor is not self starting. (10M) 2. Write the Numerical for Calculate input current, power factor, developed power, output power and efficiency (Given) (10M) 3. Explain capacitor start 1phase single phase Induction motor. (5M) 4. Double field revolving theory. (10M) MODULE4 1. Illustrate with phasor diagram the working of capacitor start single phase induction motor. (10M) 2. Types of Single phase Induction Motor & its Applications MODULE5 1. State the factors affecting the choice of specific electric and magnetic loadings of a 3 phase induction motor. Justify the statements. (10M) 2. What is the significance of magnetic loading? (5M) 3. Derive the output equation of a 3phase Induction motor in terms of main dimensions. (10M) 4. What is frame and frame size in case of Induction motor? Draw a figure showing structural dimensions of standard frame? (10M) 5. Write the Numerical for Choice of specific electric and magnetic loadings (10M) MODULE6 1. What is B(60)? State its significance. (5M) 2. Write a short note on Carter’s coefficient. (10M) 3. Explain the calculation of leakage reactance for parallel sided stator slot of induction motor. (10M) 4. Explain dispersion coefficient. (5M) PE
1. Explain VI characteristics of an SCR. (5M) 2. With the help of two transistor analogy of SCR, briefly explain why gate loses its control once SCR is turned ON? (5M) 3. Compare Silicon Carbide and Gallium Nitride devices. (5M) 4. Explain any two commutation methods of SRC. (10M) 5. Describe any one application of TriacDiac circuit. Derive the expression for RMS value of output voltage and draw the following waveforms: (i) Supply voltage; (ii) load voltage; (iii) Voltage across Triac. (10M) MODULE2 1. Compare BJT and MOSFET devices. (5M) 2. Explain the switching performance of IGBT with relevant waveforms. Compare with MOSFET. (10M) 3. What is need of snubber circuit? Explain the working of turn off snubber circuit. (10M) 4. What is the need for a Snubber circuit? Explain any one snubber circuit. (10M) 5. Give a comparison between MOSFET and IGBT (any five points). Why driver circuit is needed to drive MOSFET and IGBT? Suggest any suitable driver circuit. (10M) MODULE3 1. A single phase full wave controlled bridge rectifier is operated with RL load. Draw the diagram and derive the average output voltage. What are its advantages? (10M) 2. Write the Numerical for With neat circuit diagram explain the operation of three phase fully controlled bridge converter with R load. Derive the average output voltage. Also sketch the following waveforms (Given) (20M) 3. What are the advantages of PWM rectifier as compared to controlled rectifier using SCR? What are its applications? Illustrate the diagram of a single phase PWM rectifier. (5M) 4. Write the Numerical for Draw a three phase half controlled rectifier (semi controlled) and the gating pulse sequence and explain briefly. (Given) (20M) MODULE4 1. Explain the workings of any one single phase PWM rectifier. (5M) 2. Compare VSI and CSI. (5M) 3. Explain the operation of three phase bridge inverter feeding a resistive load for 120_ conduction mode. Draw the pulse sequence for the switching and sketch all phase voltages waveforms. (10M) 4. Write the Numerical for Illustrate the diagram of a singlephase half bridge inverter and draw the output voltage waveform for square wave mode of operation. (Given) (5M) 5. Write the Numerical for Explain the operation of 3Φ bridge inverter feeding. (Given) Draw the pulse sequence for the switches and sketch all phase voltages and any one line voltage waveform. (10M) 6. Explain any two pulse width modulation techniques of inverter. (10M) MODULE5 1. Raw the circuit diagram of Boost Dc to Dc convertor along with the following waveforms (i) Inductor voltage (ii) Inductor current (iii) Switch current (iv) Diode current. (5M) 2. Write the Numerical for All with resistive load and only CCM mode (Given) (10M) 4. Describe the operation of single phase to single phase step down cycloconverter. (10M) 5. Mention any two applications of dc to dc converter. Draw the diagram of Buck dc to dc converter and draw the inductor voltage, inductor current and derive the voltage ratio. (5M) 6.Write the Numerical for Draw a diagram of a Boost converter and derive its voltage ratio. (Given) (10M) MODULE6 1. With neat circuit diagram explain the operation of AC voltage controller feeding RL load. (10M) PSII
MODULE1 1. Discuss the role of short circuit in MVA. (5M) 2. Write the Numerical for Derive an equation for maximum value of short circuit current on a transmission line. State the various assumptions made. (10M) 3. Write the Numerical for Find the sub transient current in generator, motor and fault. (10M) 4. Discuss the operation of synchronous machine on no load condition with waveform equation and equivalent circuit. (10M) 5. Why are the pre fault currents usually neglected in fault computation. (5M) 6. Write the Numerical for ZBus formulation. (10M) 7. Discuss the sequence networks of synchronous machine. (10M) MODULE2 1. What are the various assumptions on development of sequence network of power system. (5M) 2. Discuss the phase shift of symmetrical components in star delta transformer. \ (10M) 3. Write the Numerical for Find the symmetrical components of line currents also find the symmetrical components of delta currents. (10M) 4. Why the HV lines are provided with ground wire as a topmost conductor? – Module no. 2  (5M) 5. Derive the Fortescue Theorem for symmetrical component analysis. (10M) MODULE3 1. Derive the sequence network for one conductor and two conductors open condition from circuit conditions and symmetrical components. (10M) 2. Derive the equation for fault current and sequence network for a double line to ground fault. State the various assumptions in calculations. (10M) 3. Which type of fault/faults occurs frequently? And why? (5M) 4. Write the Numerical for Determine the fault current and line to line voltages. Neglect resistance. (10M) 5. Derive the equation for fault current for a double line to ground fault. State the various assumptions. Draw the sequence network for same. (10M) MODULE4 1. Discuss the generation of voltage and current travelling waves travelling waves on an open circuited line with figures and equations. (10M) 2. Calculate the voltage and current rating of an arrestor if it is placed at the end of the line and at the junction of two lines. Draw the equivalent circuit for the same. (10M) 3. Discuss the phenomenon of transient generation due to capacitance switching. (10M) 4. Discuss the terms with respect to lightning phenomenon “Insulator Flashover, Withstand Voltage, Direct Stroke”. (10M) 5. Write the Numerical for Find the voltage rise at the junction due to surge. (10M) 6. Write an algorithm for short circuit studies. (10M) MODULE5 1. Explain the terms with respect to insulation level, BIL, FOW and CWW. (5M) 2. Why insulation coordination is required? (5M) MODULE6 1. Discuss the role of bundle conductors in corona. (5M) 2. Discuss the generation and formation of cornea ring and corona pulses in EHV lines. (10M) 3. Write the Numerical for Find critical disruptive voltage, and critical voltage for local and general corona on three phase overhead transmission line consisting of three stranded copper conductors spaced (Given) (10M) Semester 6PSE
MODULE1
EMIV
MODULE1
SP
MODULE1
MCA
MODULE1
CSII
MODULE1

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