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