BEE Viva Questions PDF

Chapter 1: DC Circuits 1. What is Resistance, Inductance and capacitance? 2. State ohms law. Where it is not applicable? 3. Define voltage , current 4. What are dependent and independent sources 5. What is source transformation 6. State kirchoffs laws. 7. Identify series and pa...

Chapter 1: DC Circuits 1. What is Resistance, Inductance and capacitance? 2. State ohms law. Where it is not applicable? 3. Define voltage , current 4. What are dependent and independent sources 5. What is source transformation 6. State kirchoffs laws. 7. Identify series and parallel circuits 8. What is star and delta connection? state formulas for transformations 9. Identify Star and delta networks and do conversion 10. Statements of Superposition, thevenins, nortons, max power theorem 11. What are internal resistances of ideal voltage source and current source? 12. What is the condition for max power transfer from source to load in any circuit? Chapter 2: AC Circuits 13. What is DC and AC supply? Difference between them 14. Generation of DC and AC voltages with emf equations 15. What is period, frequency, average , rms , peak amplitude, phase difference, leading , lagging waveform 16. Define amplitude factor and form factor 17. What is rms and average value of pure sinusoidal waveform 18. What is power factor? Should be high or low. Explain 19. Add and subtract following signals and find resultant: V1 = 10 sin (wt+30) , V2 = 20 cos (wt+70) 20. If AC supply is given to Resistor, draw phasor diagram. What will be power factor 21. If pf is unity, circuit contains which component? 22. If total impedance angle is negative, pf is lagging or leading? 23. If AC supply is given to pure Inductor, draw phasor diagram. What will be power factor 24. If AC supply is given to pure Capacitor, draw phasor diagram. What will be power factor 25. If AC supply is given to choke coil, draw phasor diagram. What will be power factor 26. If AC supply is given to Resistor- capacitor circuit, draw phasor diagram. What will be power factor 27. Draw impedance, power and voltage triangle for RL and RC circuit 28. How many powers are involved in AC circuits. Which are they? Explain each one 29. What are concepts of susceptance, conductance, admittance for parallel circuits 30. What is Resonance? Difference between series and parallel resonance. 31. What is dynamic impedance? 32. What is concept of 3 dB bandwidth in resonance graph 33. What is Quality factor? Justify it should be high or low  Chapter 3: Three phase Circuits 34. What is difference between single phase and polyphase system 35. What is phase sequence for three phase system. What is phase difference between each phase? And why? 36. Explain three phase supply generation 37. Draw phasor diagram and waveform for three phase supply 38. What are advantages and applications of three phase system 39. What is concept of phase voltage, phase current, line voltage, line current 40. Explain Balanced load and balanced supply system 41. What is relation between phase voltage and line voltage for star and delta connection 42. What is relation between phase current and line current for star and delta connection 43. What is impedance and power relation between star and delta connections 44. Phasor diagram for star and delta connection 45. What are methods of power measurement in three phase system? Which method is more preferable and why? 46. Explain advantages of three phase system Chapter 4: Single phase transformers 47. Explain working of transformer with emf equation 48. What is transformation ratio 49. Explain constructional details and types of transformer 50. What is kva rating of transformer? What is full load current? No load current? 51. What are losses in transformer 52. What is practical transformer? Draw and explain 53. Draw phasor diagram for ideal transformer with no load 54. Draw phasor diagram for practical transformer with no load 55. What are two components of no load current 56. Draw equivalent circuit of transformer 57. Define voltage regulation with formula 58. Define efficiency with formula 59. What is oc test and sc test and where it is used 60. In a transformer primary and secondary voltages are _____0 out of phase Chapter 5: Electrical Machines 61. Explain principle of operation of Three-phase induction motor. 62. What are the different parts used in three phase induction machine.