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