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. 7. What is the type of A.C single phase motor? Induction start induction run motor Capacitor start induction run motor Permanent capacitor motor Capacitor start capacitor run motorQuestion 1 of 41Question 2 of 41 2. 20. Why the hysteresis motor is suitable for sound recording instruments? Less error operation Noiseless operation Small in size High efficiencyQuestion 2 of 41Question 3 of 41 3. 11. What is the function of centrifugal switch in single phase motors? Break the running winding Protect the motor from over loading Maintain constant speed Break the starting windingQuestion 3 of 41Question 4 of 41 4. 24. How to produce starting torque in a shaded pole fan motor? Interchanging the field coil windings by switch Using capacitor on winding circuits Using rings on poles Interchanging cage rotor windings by switchQuestion 4 of 41Question 5 of 41 5. 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 an inductor in series with centrifugal switch By connecting capacitor across centrifugal switch By connecting capacitor in series with centrifugal switchQuestion 5 of 41Question 6 of 41 6. 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 infinity Running winding is more, starting winding less Running winding is less, starting winding more Both resistances will be equalQuestion 6 of 41Question 7 of 41 7. 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 7 of 41Question 8 of 41 8. 3. What is the working principle of split phase motor? Faraday's laws of electrolysis Lenz's law Joule's law Faraday's laws of electromagnetic inductionQuestion 8 of 41Question 9 of 41 9. 19. What is the angular displacement between starting and running winding of a single phase induction motor? 90 electrical degree 120 electrical degree 45 electrical degree 60 electrical degreeQuestion 9 of 41Question 10 of 41 10. 22. Which type of motor has relatively small starting torque? Capacitor start induction run motor Universal motor Capacitor start capacitor run motor Resistance start induction run motorQuestion 10 of 41Question 11 of 41 11. 18. Which type of single phase induction motor is used in food mixer? Universal motor Shaded pole motor Repulsion motor Permanent capacitor motorQuestion 11 of 41Question 12 of 41 12. 36. What is the effect in a repulsion motor, if the magnetic axis shifted to another side? Motor speed increases from rated speed Motor speed will reduce from rated speed Direction of rotation remains same Direction of rotation will changeQuestion 12 of 41Question 13 of 41 13. 32. Which type of single-phase motor has very high starting torque? Reluctance motor Universal motor Capacitor start induction run motor Repulsion start induction run motorQuestion 13 of 41Question 14 of 41 14. 10. Which type of AC single phase motor having low starting torque? Resistance start induction run motor Induction start induction run motor Capacitor start capacitor run motor Capacitor start induction run motorQuestion 14 of 41Question 15 of 41 15. 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 Protect from the over loading Reduce the sparks on the contactsQuestion 15 of 41Question 16 of 41 16. 30. Which type of single-phase motor is used for hard disk drives? Hysteresis motor Stepper motor Reluctance motor Repulsion motorQuestion 16 of 41Question 17 of 41 17. 29. What is the application of a shaded pole motor? Ceiling fan Washing machine Wet grinder Hair dryerQuestion 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. 6. Which method is adopted to start the single phase induction motor? Varying supply voltage method Reversal of running coil connection Reversal of input supply terminals Split phase methodQuestion 19 of 41Question 20 of 41 20. 27. Why is the running winding placed at the bottom of the core? To get high inductance To get low inductance To get low resistance To get high resistanceQuestion 20 of 41Question 21 of 41 21. 15. What is the function of the part marked as 'x' in shaded pole motor? Initiate the rotor movement Strengthen the magnetic field Maintain constant speed Increase the efficiencyQuestion 21 of 41Question 22 of 41 22. 4. Which type of single phase motor is illustrated? Permanent capacitor motor Capacitor start capacitor run motor Capacitor start induction run motor Universal motorQuestion 22 of 41Question 23 of 41 23. 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 both windings after reaching 75-80% speed Disconnect the starting capacitor after reaching 75-80% speed Disconnect the running winding after reaching 75-80% speedQuestion 23 of 41Question 24 of 41 24. 1. What is the working principle of single phase induction motor? Faraday's laws of electromagnetic induction Faraday's laws of electrolysis Joule's law Lenz's lawQuestion 24 of 41Question 25 of 41 25. 5. Which type of A.C single phase motor is classified under commutator motor type? Permanent capacitor motor Stepper motor Repulsion motor Shaded pole motorQuestion 25 of 41Question 26 of 41 26. 16. How the direction of rotation of a capacitor start induction run motor is reversed? By changing the supply terminals By changing the capacitor connections By interchanging main winding terminals By interchanging both main and auxiliary winding terminalsQuestion 26 of 41Question 27 of 41 27. 17. Which single phase motor tapped field speed control method is employed? Capacitor start induction run motor Shaded pole motor Universal motor Capacitor start capacitor run motorQuestion 27 of 41Question 28 of 41 28. 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 improve the power factor To reduce the sparks in contactsQuestion 28 of 41Question 29 of 41 29. 38. How the direction of rotation of repulsion motors is to be reversed? By changing the compensating winding terminals By changing the main winding terminals By shifting the brush-axis By interchanging the supply terminalsQuestion 29 of 41Question 30 of 41 30. 12. Which is the application of universal motor? Food mixer Teleprinter Compressor Jet pumpQuestion 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° 120° 240° 180°Question 31 of 41Question 32 of 41 32. 26. Which motor is having half-coil winding? None of the above Mixer Grinder Ceiling fan Washing machineQuestion 32 of 41Question 33 of 41 33. 2. What is the name of single phase motor? Permanent capacitor motor Induction start capacitor run motor Capacitor start induction run motor Capacitor start capacitor run motorQuestion 33 of 41Question 34 of 41 34. 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 running winding In parallel with starting windingQuestion 34 of 41Question 35 of 41 35. 37. What is the effect if the centrifugal switch is not disconnected after the motor starts? Motor will run normally Motor will stop immediately Starting winding will burn out Motor will run very slow speedQuestion 35 of 41Question 36 of 41 36. 21. Which motor is preferred for domestic water pumps? Universal Motor Repulsion motor Capacitor start motor Shaded pole motorQuestion 36 of 41Question 37 of 41 37. 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 Runs with very high speed Reduction in speedQuestion 37 of 41Question 38 of 41 38. 25. What is the reason to use a permanent capacitor in a fan motor circuit? Splitting of phase for torque Speed regulation Controlling electrical interference Lower power consumptionQuestion 38 of 41Question 39 of 41 39. 9. Which type of winding wire is used for rewinding submersible pumps? Single cotton covered copper wire PVC covered copper wire Double cotton covered copper wire Super enamelled copper wireQuestion 39 of 41Question 40 of 41 40. Here's the Aiken format for questions 35-41 with explanations: Motor will not run Motor runs in very high speed Motor runs and takes more current at no load. What is the effect, if coil group connection is wrongly connected in a single phase motor rewinding? Motor runs slowlyQuestion 40 of 41Question 41 of 41 41. 13. Which single phase motor is fitted with wound rotor? Permanent capacitor motor Repulsion motor Capacitor start capacitor run motor Shaded pole motorQuestion 41 of 41 Loading...
