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. 22. Which type of motor has relatively small starting torque? Resistance start induction run motor Capacitor start induction run motor Universal motor Capacitor start capacitor run motorQuestion 1 of 41Question 2 of 41 2. 25. What is the reason to use a permanent capacitor in a fan motor circuit? Lower power consumption Controlling electrical interference Splitting of phase for torque Speed regulationQuestion 2 of 41Question 3 of 41 3. 4. Which type of single phase motor is illustrated? Capacitor start capacitor run motor Permanent capacitor motor Universal motor Capacitor start induction run motorQuestion 3 of 41Question 4 of 41 4. 15. What is the function of the part marked as 'x' in shaded pole motor? Strengthen the magnetic field Increase the efficiency Maintain constant speed Initiate the rotor movementQuestion 4 of 41Question 5 of 41 5. 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 less, starting winding infinity Running winding is more, starting winding lessQuestion 5 of 41Question 6 of 41 6. 10. Which type of AC single phase motor having low starting torque? Capacitor start induction run motor Induction start induction run motor Capacitor start capacitor run motor Resistance start induction run motorQuestion 6 of 41Question 7 of 41 7. 6. Which method is adopted to start the single phase induction motor? Reversal of running coil connection Varying supply voltage method Split phase method Reversal of input supply terminalsQuestion 7 of 41Question 8 of 41 8. 16. How the direction of rotation of a capacitor start induction run motor is reversed? By changing the supply terminals By interchanging both main and auxiliary winding terminals By changing the capacitor connections By interchanging main winding terminalsQuestion 8 of 41Question 9 of 41 9. 26. Which motor is having half-coil winding? Mixer Grinder Ceiling fan None of the above Washing machineQuestion 9 of 41Question 10 of 41 10. 33. Where is the capacitor connected in a single-phase permanent capacitor motor? In series with starting winding In series with running winding In parallel with running winding In parallel with starting windingQuestion 10 of 41Question 11 of 41 11. 27. Why is the running winding placed at the bottom of the core? To get low inductance To get low resistance To get high inductance To get high resistanceQuestion 11 of 41Question 12 of 41 12. 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 12 of 41Question 13 of 41 13. 20. Why the hysteresis motor is suitable for sound recording instruments? Noiseless operation Less error operation High efficiency Small in sizeQuestion 13 of 41Question 14 of 41 14. 2. What is the name of single phase motor? Induction start capacitor run motor Permanent capacitor motor Capacitor start induction run motor Capacitor start capacitor run motorQuestion 14 of 41Question 15 of 41 15. 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 both windings after reaching 75-80% speed Disconnect the starting capacitor after reaching 75-80% speedQuestion 15 of 41Question 16 of 41 16. Here's the Aiken format for questions 35-41 with explanations: Motor runs slowly Motor will not run. What is the effect, if coil group connection is wrongly connected in a single phase motor rewinding? Motor runs and takes more current at no load Motor runs in very high speedQuestion 16 of 41Question 17 of 41 17. 11. What is the function of centrifugal switch in single phase motors? Break the running winding Break the starting winding Protect the motor from over loading Maintain constant speedQuestion 17 of 41Question 18 of 41 18. 34. Which motor is used in a table fan? Shaded pole motor Eddy current motor Universal motor Permanent capacitor 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? Reduction in speed Works normally Runs with very high speed Reduction in torqueQuestion 19 of 41Question 20 of 41 20. 18. Which type of single phase induction motor is used in food mixer? Repulsion motor Permanent capacitor motor Universal motor Shaded pole motorQuestion 20 of 41Question 21 of 41 21. 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 changing the main winding terminals By interchanging the supply terminalsQuestion 21 of 41Question 22 of 41 22. 12. Which is the application of universal motor? Food mixer Compressor Jet pump TeleprinterQuestion 22 of 41Question 23 of 41 23. 13. Which single phase motor is fitted with wound rotor? Repulsion motor Shaded pole motor Capacitor start capacitor run motor Permanent capacitor motorQuestion 23 of 41Question 24 of 41 24. 23. What is the function of a centrifugal switch in a split-phase motor? Maintains constant speed Protects the motor from overloading Protects from overcurrent Make and break the starting winding from supplyQuestion 24 of 41Question 25 of 41 25. 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 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. 3. What is the working principle of split phase motor? Faraday's laws of electrolysis Faraday's laws of electromagnetic induction Lenz's law Joule's lawQuestion 27 of 41Question 28 of 41 28. 8. What is the purpose of the capacitor (C) in centrifugal switch speed control method of universal motor? Maintain constant speed Improve the power factor Reduce the sparks on the contacts Protect from the over loadingQuestion 28 of 41Question 29 of 41 29. 32. Which type of single-phase motor has very high starting torque? Universal motor Reluctance motor Repulsion start induction run motor Capacitor start induction run motorQuestion 29 of 41Question 30 of 41 30. 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 30 of 41Question 31 of 41 31. 5. Which type of A.C single phase motor is classified under commutator motor type? Stepper motor Permanent capacitor motor Shaded pole motor Repulsion motorQuestion 31 of 41Question 32 of 41 32. 28. Calculate the slot distance for a ceiling fan with 28 slots, 14 poles, and 14 coils in half-coil connection? 90° 240° 180° 120°Question 32 of 41Question 33 of 41 33. 30. Which type of single-phase motor is used for hard disk drives? Hysteresis motor Repulsion motor Reluctance motor Stepper motorQuestion 33 of 41Question 34 of 41 34. 1. What is the working principle of single phase induction motor? Joule's law Faraday's laws of electromagnetic induction Faraday's laws of electrolysis Lenz's lawQuestion 34 of 41Question 35 of 41 35. 29. What is the application of a shaded pole motor? Wet grinder Hair dryer Ceiling fan Washing machineQuestion 35 of 41Question 36 of 41 36. 21. Which motor is preferred for domestic water pumps? Repulsion motor Shaded pole motor Universal Motor Capacitor start motorQuestion 36 of 41Question 37 of 41 37. 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 37 of 41Question 38 of 41 38. 7. What is the type of A.C single phase motor? Permanent capacitor motor Capacitor start induction run motor Capacitor start capacitor run motor Induction start induction run motorQuestion 38 of 41Question 39 of 41 39. 17. Which single phase motor tapped field speed control method is employed? Capacitor start capacitor run motor Universal motor Shaded pole motor Capacitor start induction run motorQuestion 39 of 41Question 40 of 41 40. 24. How to produce starting torque in a shaded pole fan motor? Interchanging cage rotor windings by switch Using capacitor on winding circuits Interchanging the field coil windings by switch Using rings on polesQuestion 40 of 41Question 41 of 41 41. 19. What is the angular displacement between starting and running winding of a single phase induction motor? 45 electrical degree 90 electrical degree 120 electrical degree 60 electrical degreeQuestion 41 of 41 Loading...
