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. 34. Which motor is used in a table fan? Permanent capacitor motor Universal motor Eddy current motor Shaded pole motorQuestion 1 of 41Question 2 of 41 2. 4. Which type of single phase motor is illustrated? Capacitor start induction run motor Universal motor Permanent capacitor motor Capacitor start capacitor run motorQuestion 2 of 41Question 3 of 41 3. 29. What is the application of a shaded pole motor? Washing machine Ceiling fan Hair dryer Wet grinderQuestion 3 of 41Question 4 of 41 4. 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 running winding after reaching 75-80% speed Disconnect the starting capacitor after reaching 75-80% speed Disconnect both windings after reaching 75-80% speedQuestion 4 of 41Question 5 of 41 5. Here's the Aiken format for questions 35-41 with explanations: Motor runs in very high speed. What is the effect, if coil group connection is wrongly connected in a single phase motor rewinding? Motor will not run Motor runs slowly Motor runs and takes more current at no loadQuestion 5 of 41Question 6 of 41 6. 39. Why a capacitor is connected across centrifugal switch in the centrifugal switch speed control method? To maintain constant speed To improve the power factor To protect from over loading To reduce the sparks in contactsQuestion 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 more, starting winding less Both resistances will be equal Running winding is less, starting winding infinity Running winding is less, starting winding moreQuestion 7 of 41Question 8 of 41 8. 13. Which single phase motor is fitted with wound rotor? Capacitor start capacitor run motor Permanent capacitor motor Repulsion motor Shaded pole motorQuestion 8 of 41Question 9 of 41 9. 15. What is the function of the part marked as 'x' in shaded pole motor? Initiate the rotor movement Strengthen the magnetic field Increase the efficiency Maintain constant speedQuestion 9 of 41Question 10 of 41 10. 17. Which single phase motor tapped field speed control method is employed? Shaded pole motor Capacitor start capacitor run motor Universal motor Capacitor start induction run motorQuestion 10 of 41Question 11 of 41 11. 30. Which type of single-phase motor is used for hard disk drives? Repulsion motor Stepper motor Reluctance motor Hysteresis motorQuestion 11 of 41Question 12 of 41 12. 11. What is the function of centrifugal switch in single phase motors? Maintain constant speed Break the starting winding Protect the motor from over loading Break the running windingQuestion 12 of 41Question 13 of 41 13. 26. Which motor is having half-coil winding? None of the above Ceiling fan Mixer Grinder Washing machineQuestion 13 of 41Question 14 of 41 14. 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 14 of 41Question 15 of 41 15. 7. What is the type of A.C single phase motor? Capacitor start induction run motor Permanent capacitor motor Induction start induction run motor Capacitor start capacitor run motorQuestion 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 60 electrical degree 90 electrical degree 45 electrical degreeQuestion 17 of 41Question 18 of 41 18. 18. Which type of single phase induction motor is used in food mixer? Repulsion motor Universal motor Permanent capacitor motor Shaded pole motorQuestion 18 of 41Question 19 of 41 19. 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 speed Reduction in torque Works normallyQuestion 19 of 41Question 20 of 41 20. 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 20 of 41Question 21 of 41 21. 9. Which type of winding wire is used for rewinding submersible pumps? Double cotton covered copper wire PVC covered copper wire Super enamelled copper wire Single cotton covered copper wireQuestion 21 of 41Question 22 of 41 22. 23. What is the function of a centrifugal switch in a split-phase motor? Protects from overcurrent Protects the motor from overloading Maintains constant speed Make and break the starting winding from supplyQuestion 22 of 41Question 23 of 41 23. 16. How the direction of rotation of a capacitor start induction run motor is reversed? By changing the capacitor connections By changing the supply terminals By interchanging both main and auxiliary winding terminals By interchanging main winding terminalsQuestion 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. 37. What is the effect if the centrifugal switch is not disconnected after the motor starts? Motor will run normally Motor will stop immediately Motor will run very slow speed Starting winding will burn outQuestion 25 of 41Question 26 of 41 26. 12. Which is the application of universal motor? Compressor Food mixer Jet pump TeleprinterQuestion 26 of 41Question 27 of 41 27. 6. Which method is adopted to start the single phase induction motor? Reversal of input supply terminals Split phase method Varying supply voltage method Reversal of running coil connectionQuestion 27 of 41Question 28 of 41 28. 32. Which type of single-phase motor has very high starting torque? Reluctance motor Universal motor Repulsion start induction run motor Capacitor start induction run motorQuestion 28 of 41Question 29 of 41 29. 8. What is the purpose of the capacitor (C) in centrifugal switch speed control method of universal motor? Improve the power factor Reduce the sparks on the contacts Protect from the over loading Maintain constant speedQuestion 29 of 41Question 30 of 41 30. 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 30 of 41Question 31 of 41 31. 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 across centrifugal switch By connecting capacitor in series with centrifugal switchQuestion 31 of 41Question 32 of 41 32. 38. How the direction of rotation of repulsion motors is to be reversed? By shifting the brush-axis By changing the compensating winding terminals By interchanging the supply terminals By changing the main winding terminalsQuestion 32 of 41Question 33 of 41 33. 20. Why the hysteresis motor is suitable for sound recording instruments? Small in size Less error operation Noiseless operation High efficiencyQuestion 33 of 41Question 34 of 41 34. 22. Which type of motor has relatively small starting torque? Universal motor Resistance start induction run motor Capacitor start capacitor run motor Capacitor start induction run motorQuestion 34 of 41Question 35 of 41 35. 25. What is the reason to use a permanent capacitor in a fan motor circuit? Splitting of phase for torque Controlling electrical interference Speed regulation Lower power consumptionQuestion 35 of 41Question 36 of 41 36. 2. What is the name of single phase motor? Induction start capacitor run motor Capacitor start induction run motor Permanent capacitor motor Capacitor start capacitor run motorQuestion 36 of 41Question 37 of 41 37. 21. Which motor is preferred for domestic water pumps? Universal Motor Repulsion motor Capacitor start motor Shaded pole motorQuestion 37 of 41Question 38 of 41 38. 5. Which type of A.C single phase motor is classified under commutator motor type? Stepper motor Permanent capacitor motor Repulsion motor Shaded pole motorQuestion 38 of 41Question 39 of 41 39. 27. Why is the running winding placed at the bottom of the core? To get high inductance To get high resistance To get low resistance To get low inductanceQuestion 39 of 41Question 40 of 41 40. 33. Where is the capacitor connected in a single-phase permanent capacitor motor? In series with starting winding In parallel with starting winding In parallel with running winding In series with running windingQuestion 40 of 41Question 41 of 41 41. 28. Calculate the slot distance for a ceiling fan with 28 slots, 14 poles, and 14 coils in half-coil connection? 180° 120° 90° 240°Question 41 of 41 Loading...
