Chapter 9 Review Questions Essay

Chapter 9 Review Questions1. What is magnetic attraction?2. Torque is ________.3. A magnetic field is _________.4. True or erroneous A permanent magnet is a piece of material that has been magnetised and can hold its magnetic faculty for a reasonable space of time. 5. How is an electromagnet produced?6. Which of the pursuit produces the best electromagnet?7. Un wish well poles of a magnet _________each other and like poles_________ each other. 8. What part does polarity play in the operation of an voltaic car repulse? 9. What part of a push produces an inductive magnetic field within itself to facilitate the rotating motion? 10. What part does the frequency of alternating ongoing play in the operation of an electric motor? 11. What would be the stronghold of a two pole motor operating on a 120 Volts 60 Hz power supply? 12. What ar the quintuple types of single phase motors utilise in the industry? 13. Which of the following justly lists the motors showtimeing torque from lowest to highest? 14. Which of the following is a common use of a shaded-pole motor? 15. How does a shaded-pole motor plump?16. How can a shaded-pole motor be reversed?17. What determines the rotation of a shaded-pole motor?18. Draw a diagram of a three-speed, shaded-pole motor.19. What enables a split-phase motor to develop enough torque to begin rotation? 20. What removes the starting convoluted from the electrical circuit of an open type split phase motor once it reaches 75% of its operating speed? 21. What ar the three presumable areas of trouble in a split-phase motor? 22. What is the unit of measurement for the strength of a electrical condenser? 23. What is the purpose of a condenser?24. What is the difference in the midst of a running and a running and a starting capacitor? 25. List the five capacitor replacement rules.26. formulate the operation of a permanent split-capacitor motor. 27. How are a PSC motor and a capacitor start capacitor-run motor similar? 28 . What are the advantages and disadvantages of using the following types of motors?29. What are the similarities mingled with an open-type split-phase motor and a capacitor-start motor? 30. Which of the following is an advantage in using a three-phase motor? 31. Draw a wiring diagram of a capacitor start-capacitor-run motor. 32. True or False All starting apparatuses are mounted externally to the tight compressor shell. 33. What is the process in troubleshooting any electric motor? 34. Which of the following is the capacitance of an 88 uF and a 108 uF starting capacitor connected in series? 35. Which of the following is the capacitance of two 20 uF running capacitors connected in parallel? 36. If a capacitor produces 15A on a 240 volt supply, which of the following is its microfarad rating? 37. Which of the following capacitors could be used to replace a 35 uF, 370 running capacitor? 38. Which of the following capacitors could be used to replace a 188 uF, 250 V starting capacitor ? 39. Which of the following capacitors or combination of capacitors could be used to replace a 45 uF, 370 V running capacitor? 40. Which of the following capacitors or combination of capacitors could be used to replace an 88 uF, 250 V starting capacitor? 41. breakthrough the common, start, and run terminals of the following tight compressors. A.B.C.42. Briefly explain the procedure for troubleshooting hermetic compressor motors. 43. What are the electrical failure categories for hermetic compressor motors? 44. What precautions should be taken when checking hermetic compressor motors? 45. What would be the highest allowable fortress reading for a grounded compressor motor? 46. What are the advantages of using an electronically commutated motor over a PSC motor? 47. Explain the construction of an ECM.48. An ECM is a ______________.49. True or False The resistance readings of the windings of a properly operating ECM should be equal. 50. True or False The line voltage power supply o f an ECM should be disconnected or connected with the power on.