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. 15. What is the function of the part marked as 'x' in shaded pole motor? Initiate the rotor movement Increase the efficiency Maintain constant speed Strengthen the magnetic fieldQuestion 1 of 41Question 2 of 41 2. 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 Both resistances will be equal Running winding is more, starting winding less Running winding is less, starting winding infinityQuestion 2 of 41Question 3 of 41 3. 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 3 of 41Question 4 of 41 4. 34. Which motor is used in a table fan? Universal motor Eddy current motor Shaded pole motor Permanent capacitor motorQuestion 4 of 41Question 5 of 41 5. 1. What is the working principle of single phase induction motor? Faraday's laws of electrolysis Faraday's laws of electromagnetic induction Joule's law Lenz's lawQuestion 5 of 41Question 6 of 41 6. 20. Why the hysteresis motor is suitable for sound recording instruments? Noiseless operation Small in size High efficiency Less error operationQuestion 6 of 41Question 7 of 41 7. 22. Which type of motor has relatively small starting torque? Capacitor start induction run motor Capacitor start capacitor run motor Resistance start induction run motor Universal motorQuestion 7 of 41Question 8 of 41 8. 5. Which type of A.C single phase motor is classified under commutator motor type? Permanent capacitor motor Repulsion motor Stepper motor Shaded pole motorQuestion 8 of 41Question 9 of 41 9. 3. What is the working principle of split phase motor? Faraday's laws of electrolysis Joule's law Faraday's laws of electromagnetic induction Lenz's lawQuestion 9 of 41Question 10 of 41 10. 11. What is the function of centrifugal switch in single phase motors? Protect the motor from over loading Break the running winding Maintain constant speed Break the starting windingQuestion 10 of 41Question 11 of 41 11. 29. What is the application of a shaded pole motor? Ceiling fan Wet grinder Washing machine Hair dryerQuestion 11 of 41Question 12 of 41 12. 33. Where is the capacitor connected in a single-phase permanent capacitor motor? In series with running winding In parallel with running winding In series with starting winding In parallel with starting windingQuestion 12 of 41Question 13 of 41 13. 27. Why is the running winding placed at the bottom of the core? To get low resistance To get high inductance To get high resistance To get low inductanceQuestion 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 Universal motor Shaded pole motorQuestion 14 of 41Question 15 of 41 15. 23. What is the function of a centrifugal switch in a split-phase motor? Make and break the starting winding from supply Protects the motor from overloading Protects from overcurrent Maintains constant speedQuestion 15 of 41Question 16 of 41 16. 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 16 of 41Question 17 of 41 17. 19. What is the angular displacement between starting and running winding of a single phase induction motor? 120 electrical degree 90 electrical degree 60 electrical degree 45 electrical degreeQuestion 17 of 41Question 18 of 41 18. 6. Which method is adopted to start the single phase induction motor? Reversal of running coil connection Split phase method Varying supply voltage method Reversal of input supply terminalsQuestion 18 of 41Question 19 of 41 19. 12. Which is the application of universal motor? Jet pump Food mixer Teleprinter CompressorQuestion 19 of 41Question 20 of 41 20. Here's the Aiken format for questions 35-41 with explanations: Motor will not run. 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 runs and takes more current at no loadQuestion 20 of 41Question 21 of 41 21. 21. Which motor is preferred for domestic water pumps? Universal Motor Capacitor start motor Shaded pole motor Repulsion motorQuestion 21 of 41Question 22 of 41 22. 30. Which type of single-phase motor is used for hard disk drives? Stepper motor Hysteresis motor Reluctance motor Repulsion motorQuestion 22 of 41Question 23 of 41 23. 32. Which type of single-phase motor has very high starting torque? Reluctance motor Repulsion start induction run motor Capacitor start induction run motor Universal motorQuestion 23 of 41Question 24 of 41 24. 4. Which type of single phase motor is illustrated? Capacitor start induction run motor Capacitor start capacitor run motor Universal motor Permanent capacitor motorQuestion 24 of 41Question 25 of 41 25. 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 Reduction in torque Runs with very high speedQuestion 25 of 41Question 26 of 41 26. 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 26 of 41Question 27 of 41 27. 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 27 of 41Question 28 of 41 28. 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 28 of 41Question 29 of 41 29. 13. Which single phase motor is fitted with wound rotor? Capacitor start capacitor run motor Permanent capacitor motor Shaded pole motor Repulsion motorQuestion 29 of 41Question 30 of 41 30. 28. Calculate the slot distance for a ceiling fan with 28 slots, 14 poles, and 14 coils in half-coil connection? 240° 120° 180° 90°Question 30 of 41Question 31 of 41 31. 10. Which type of AC single phase motor having low starting torque? Resistance start induction run motor Capacitor start capacitor run motor Induction start induction run motor Capacitor start induction run motorQuestion 31 of 41Question 32 of 41 32. 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 32 of 41Question 33 of 41 33. 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 33 of 41Question 34 of 41 34. 39. Why a capacitor is connected across centrifugal switch in the centrifugal switch speed control method? To protect from over loading To maintain constant speed To improve the power factor To reduce the sparks in contactsQuestion 34 of 41Question 35 of 41 35. 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 both windings after reaching 75-80% speed Disconnect the running winding after reaching 75-80% speed Disconnect the starting winding after reaching 75-80% speedQuestion 35 of 41Question 36 of 41 36. 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 stop immediately Motor will run very slow speedQuestion 36 of 41Question 37 of 41 37. 26. Which motor is having half-coil winding? None of the above Washing machine Mixer Grinder Ceiling fanQuestion 37 of 41Question 38 of 41 38. 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 38 of 41Question 39 of 41 39. 16. How the direction of rotation of a capacitor start induction run motor is reversed? By interchanging both main and auxiliary winding terminals By interchanging main winding terminals By changing the capacitor connections By changing the supply terminalsQuestion 39 of 41Question 40 of 41 40. 7. What is the type of A.C single phase motor? Induction start induction run motor Capacitor start capacitor run motor Capacitor start induction run motor Permanent capacitor motorQuestion 40 of 41Question 41 of 41 41. 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 41 of 41 Loading...
