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