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. 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 1 of 41Question 2 of 41 2. 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 2 of 41Question 3 of 41 3. 32. Which type of single-phase motor has very high starting torque? Universal motor Reluctance motor Capacitor start induction run motor Repulsion start induction run motorQuestion 3 of 41Question 4 of 41 4. 29. What is the application of a shaded pole motor? Wet grinder Washing machine Hair dryer Ceiling fanQuestion 4 of 41Question 5 of 41 5. 12. Which is the application of universal motor? Teleprinter Compressor Food mixer Jet pumpQuestion 5 of 41Question 6 of 41 6. 15. What is the function of the part marked as 'x' in shaded pole motor? Strengthen the magnetic field Initiate the rotor movement Increase the efficiency Maintain constant speedQuestion 6 of 41Question 7 of 41 7. 16. How the direction of rotation of a capacitor start induction run motor is reversed? By interchanging main winding terminals By changing the capacitor connections By changing the supply terminals By interchanging both main and auxiliary winding terminalsQuestion 7 of 41Question 8 of 41 8. 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 less, starting winding infinity Running winding is more, starting winding less Both resistances will be equalQuestion 8 of 41Question 9 of 41 9. 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 very slow speed Motor will run normallyQuestion 9 of 41Question 10 of 41 10. 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 reduce the sparks in contacts To improve the power factorQuestion 10 of 41Question 11 of 41 11. 36. What is the effect in a repulsion motor, if the magnetic axis shifted to another side? Direction of rotation will change Motor speed will reduce from rated speed Direction of rotation remains same Motor speed increases from rated speedQuestion 11 of 41Question 12 of 41 12. 9. Which type of winding wire is used for rewinding submersible pumps? PVC covered copper wire Single cotton covered copper wire Double cotton covered copper wire Super enamelled copper wireQuestion 12 of 41Question 13 of 41 13. 1. What is the working principle of single phase induction motor? Joule's law Faraday's laws of electromagnetic induction Lenz's law Faraday's laws of electrolysisQuestion 13 of 41Question 14 of 41 14. 8. What is the purpose of the capacitor (C) in centrifugal switch speed control method of universal motor? Improve the power factor Protect from the over loading Maintain constant speed Reduce the sparks on the contactsQuestion 14 of 41Question 15 of 41 15. 11. What is the function of centrifugal switch in single phase motors? Protect the motor from over loading Break the running winding Break the starting winding Maintain constant speedQuestion 15 of 41Question 16 of 41 16. 21. Which motor is preferred for domestic water pumps? Universal Motor Shaded pole motor Repulsion motor Capacitor start motorQuestion 16 of 41Question 17 of 41 17. 20. Why the hysteresis motor is suitable for sound recording instruments? Noiseless operation Less error operation High efficiency Small in sizeQuestion 17 of 41Question 18 of 41 18. 38. How the direction of rotation of repulsion motors is to be reversed? By changing the compensating winding terminals By shifting the brush-axis By interchanging the supply terminals By changing the main winding terminalsQuestion 18 of 41Question 19 of 41 19. 10. Which type of AC single phase motor having low starting torque? Capacitor start capacitor run motor Capacitor start induction run motor Resistance start induction run motor Induction start induction run motorQuestion 19 of 41Question 20 of 41 20. 26. Which motor is having half-coil winding? Washing machine Mixer Grinder None of the above Ceiling fanQuestion 20 of 41Question 21 of 41 21. 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 21 of 41Question 22 of 41 22. 17. Which single phase motor tapped field speed control method is employed? Universal motor Shaded pole motor Capacitor start capacitor run motor Capacitor start induction run motorQuestion 22 of 41Question 23 of 41 23. 30. Which type of single-phase motor is used for hard disk drives? Stepper motor Repulsion motor Reluctance motor Hysteresis motorQuestion 23 of 41Question 24 of 41 24. 22. Which type of motor has relatively small starting torque? Capacitor start capacitor run motor Capacitor start induction run motor Universal motor Resistance start induction run motorQuestion 24 of 41Question 25 of 41 25. 5. Which type of A.C single phase motor is classified under commutator motor type? Shaded pole motor Repulsion motor Stepper motor Permanent capacitor motorQuestion 25 of 41Question 26 of 41 26. 4. Which type of single phase motor is illustrated? Capacitor start capacitor run motor Universal motor Permanent capacitor motor Capacitor start induction run motorQuestion 26 of 41Question 27 of 41 27. 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 27 of 41Question 28 of 41 28. 34. Which motor is used in a table fan? Permanent capacitor motor Shaded pole motor Eddy current motor Universal motorQuestion 28 of 41Question 29 of 41 29. 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 29 of 41Question 30 of 41 30. 18. Which type of single phase induction motor is used in food mixer? Permanent capacitor motor Repulsion motor Shaded pole motor Universal motorQuestion 30 of 41Question 31 of 41 31. 28. Calculate the slot distance for a ceiling fan with 28 slots, 14 poles, and 14 coils in half-coil connection? 90° 180° 240° 120°Question 31 of 41Question 32 of 41 32. 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 32 of 41Question 33 of 41 33. 25. What is the reason to use a permanent capacitor in a fan motor circuit? Speed regulation Splitting of phase for torque Lower power consumption Controlling electrical interferenceQuestion 33 of 41Question 34 of 41 34. 27. Why is the running winding placed at the bottom of the core? To get low resistance To get high inductance To get low inductance To get high resistanceQuestion 34 of 41Question 35 of 41 35. 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 35 of 41Question 36 of 41 36. 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 an inductor in series with centrifugal switch By adding compensating winding with armature By connecting capacitor in series with centrifugal switchQuestion 36 of 41Question 37 of 41 37. 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 starting winding after reaching 75-80% speed Disconnect both windings after reaching 75-80% speed Disconnect the running winding after reaching 75-80% speedQuestion 37 of 41Question 38 of 41 38. 6. Which method is adopted to start the single phase induction motor? Reversal of running coil connection Varying supply voltage method Reversal of input supply terminals Split phase methodQuestion 38 of 41Question 39 of 41 39. 40. What is the effect, if some slots in a split phase motor left out without winding after completion of concentric winding? Reduction in torque Works normally Reduction in speed Runs with very high speedQuestion 39 of 41Question 40 of 41 40. 13. Which single phase motor is fitted with wound rotor? Shaded pole motor Permanent capacitor motor Capacitor start capacitor run motor Repulsion motorQuestion 40 of 41Question 41 of 41 41. 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 41 of 41 Loading...