ELECTRICIAN 2nd YEAR MODULE – AC Single Phase Motor ONLINE TEST July 2, 2025July 2, 2025 by admin TRANSLATE THIS QUIZ IN YOUR LANGUAGE इस प्रश्नोत्तरी का अपनी भाषा में अनुवाद करें <<1234567891011121314151617181920212223242526272829303132333435363738394041>> 0% Question 1 of 41 1. 1. What is the working principle of single phase induction motor? Faraday's laws of electrolysis Lenz's law Faraday's laws of electromagnetic induction Joule's lawQuestion 1 of 41Question 2 of 41 2. 3. What is the working principle of split phase motor? Faraday's laws of electromagnetic induction Lenz's law Joule's law Faraday's laws of electrolysisQuestion 2 of 41Question 3 of 41 3. 22. Which type of motor has relatively small starting torque? Resistance start induction run motor Capacitor start induction run motor Universal motor Capacitor start capacitor run motorQuestion 3 of 41Question 4 of 41 4. 33. Where is the capacitor connected in a single-phase permanent capacitor motor? In series with starting winding In parallel with running winding In parallel with starting winding In series with running windingQuestion 4 of 41Question 5 of 41 5. 14. What is the relation between running winding and starting winding of a single phase induction motor with respect to resistance? Running winding is more, starting winding less Running winding is less, starting winding more Both resistances will be equal Running winding is less, starting winding infinityQuestion 5 of 41Question 6 of 41 6. 30. Which type of single-phase motor is used for hard disk drives? Repulsion motor Reluctance motor Stepper motor Hysteresis motorQuestion 6 of 41Question 7 of 41 7. 24. How to produce starting torque in a shaded pole fan motor? Interchanging cage rotor windings by switch Using capacitor on winding circuits Interchanging the field coil windings by switch Using rings on polesQuestion 7 of 41Question 8 of 41 8. 9. Which type of winding wire is used for rewinding submersible pumps? Single cotton covered copper wire Super enamelled copper wire Double cotton covered copper wire PVC covered copper wireQuestion 8 of 41Question 9 of 41 9. 34. Which motor is used in a table fan? Permanent capacitor motor Eddy current motor Shaded pole motor Universal motorQuestion 9 of 41Question 10 of 41 10. 6. Which method is adopted to start the single phase induction motor? Varying supply voltage method Reversal of running coil connection Split phase method Reversal of input supply terminalsQuestion 10 of 41Question 11 of 41 11. 5. Which type of A.C single phase motor is classified under commutator motor type? Stepper motor Repulsion motor Permanent capacitor motor Shaded pole motorQuestion 11 of 41Question 12 of 41 12. 29. What is the application of a shaded pole motor? Ceiling fan Wet grinder Washing machine Hair dryerQuestion 12 of 41Question 13 of 41 13. 21. Which motor is preferred for domestic water pumps? Capacitor start motor Universal Motor Shaded pole motor Repulsion motorQuestion 13 of 41Question 14 of 41 14. 18. Which type of single phase induction motor is used in food mixer? Repulsion motor Permanent capacitor motor Shaded pole motor Universal motorQuestion 14 of 41Question 15 of 41 15. 17. Which single phase motor tapped field speed control method is employed? Capacitor start capacitor run motor Universal motor Shaded pole motor Capacitor start induction run motorQuestion 15 of 41Question 16 of 41 16. 7. What is the type of A.C single phase motor? Permanent capacitor motor Induction start induction run motor Capacitor start capacitor run motor Capacitor start induction run motorQuestion 16 of 41Question 17 of 41 17. 10. Which type of AC single phase motor having low starting torque? Capacitor start induction run motor Induction start induction run motor Resistance start induction run motor Capacitor start capacitor run motorQuestion 17 of 41Question 18 of 41 18. 20. Why the hysteresis motor is suitable for sound recording instruments? High efficiency Small in size Less error operation Noiseless operationQuestion 18 of 41Question 19 of 41 19. 32. Which type of single-phase motor has very high starting torque? Capacitor start induction run motor Repulsion start induction run motor Universal motor Reluctance motorQuestion 19 of 41Question 20 of 41 20. 19. What is the angular displacement between starting and running winding of a single phase induction motor? 60 electrical degree 120 electrical degree 90 electrical degree 45 electrical degreeQuestion 20 of 41Question 21 of 41 21. 26. Which motor is having half-coil winding? Washing machine Mixer Grinder Ceiling fan None of the aboveQuestion 21 of 41Question 22 of 41 22. 2. What is the name of single phase motor? Capacitor start capacitor run motor Capacitor start induction run motor Induction start capacitor run motor Permanent capacitor motorQuestion 22 of 41Question 23 of 41 23. 27. Why is the running winding placed at the bottom of the core? To get low inductance To get high inductance To get high resistance To get low resistanceQuestion 23 of 41Question 24 of 41 24. 38. How the direction of rotation of repulsion motors is to be reversed? By changing the compensating winding terminals By changing the main winding terminals By interchanging the supply terminals By shifting the brush-axisQuestion 24 of 41Question 25 of 41 25. Here's the Aiken format for questions 35-41 with explanations:. What is the effect, if coil group connection is wrongly connected in a single phase motor rewinding? Motor runs slowly Motor runs in very high speed Motor will not run Motor runs and takes more current at no loadQuestion 25 of 41Question 26 of 41 26. 41. How the radio interference can be suppressed in centrifugal switch method of speed control of universal motor? By connecting capacitor across centrifugal switch By connecting capacitor in series with centrifugal switch By adding compensating winding with armature By connecting an inductor in series with centrifugal switchQuestion 26 of 41Question 27 of 41 27. 25. What is the reason to use a permanent capacitor in a fan motor circuit? Speed regulation Lower power consumption Splitting of phase for torque Controlling electrical interferenceQuestion 27 of 41Question 28 of 41 28. 16. How the direction of rotation of a capacitor start induction run motor is reversed? By changing the capacitor connections By interchanging both main and auxiliary winding terminals By changing the supply terminals By interchanging main winding terminalsQuestion 28 of 41Question 29 of 41 29. 23. What is the function of a centrifugal switch in a split-phase motor? Make and break the starting winding from supply Protects from overcurrent Maintains constant speed Protects the motor from overloadingQuestion 29 of 41Question 30 of 41 30. 8. What is the purpose of the capacitor (C) in centrifugal switch speed control method of universal motor? Improve the power factor Reduce the sparks on the contacts Protect from the over loading Maintain constant speedQuestion 30 of 41Question 31 of 41 31. 13. Which single phase motor is fitted with wound rotor? Permanent capacitor motor Repulsion motor Capacitor start capacitor run motor Shaded pole motorQuestion 31 of 41Question 32 of 41 32. 37. What is the effect if the centrifugal switch is not disconnected after the motor starts? Starting winding will burn out Motor will stop immediately Motor will run normally Motor will run very slow speedQuestion 32 of 41Question 33 of 41 33. 40. What is the effect, if some slots in a split phase motor left out without winding after completion of concentric winding? Reduction in speed Works normally Runs with very high speed Reduction in torqueQuestion 33 of 41Question 34 of 41 34. 39. Why a capacitor is connected across centrifugal switch in the centrifugal switch speed control method? To maintain constant speed To reduce the sparks in contacts To protect from over loading To improve the power factorQuestion 34 of 41Question 35 of 41 35. 36. What is the effect in a repulsion motor, if the magnetic axis shifted to another side? Motor speed will reduce from rated speed Direction of rotation remains same Direction of rotation will change Motor speed increases from rated speedQuestion 35 of 41Question 36 of 41 36. 4. Which type of single phase motor is illustrated? Capacitor start capacitor run motor Universal motor Capacitor start induction run motor Permanent capacitor motorQuestion 36 of 41Question 37 of 41 37. 28. Calculate the slot distance for a ceiling fan with 28 slots, 14 poles, and 14 coils in half-coil connection? 240° 180° 90° 120°Question 37 of 41Question 38 of 41 38. 12. Which is the application of universal motor? Jet pump Teleprinter Compressor Food mixerQuestion 38 of 41Question 39 of 41 39. 31. What is the function of a centrifugal switch in a capacitor start, capacitor run induction motor? Disconnect both windings after reaching 75-80% speed Disconnect the starting capacitor after reaching 75-80% speed Disconnect the running winding after reaching 75-80% speed Disconnect the starting winding after reaching 75-80% speedQuestion 39 of 41Question 40 of 41 40. 11. What is the function of centrifugal switch in single phase motors? Break the running winding Break the starting winding Protect the motor from over loading Maintain constant speedQuestion 40 of 41Question 41 of 41 41. 15. What is the function of the part marked as 'x' in shaded pole motor? Initiate the rotor movement Strengthen the magnetic field Maintain constant speed Increase the efficiencyQuestion 41 of 41 Loading...
