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. Here's the Aiken format for questions 35-41 with explanations: Motor runs and takes more current at no load 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 slowlyQuestion 1 of 41Question 2 of 41 2. 9. Which type of winding wire is used for rewinding submersible pumps? PVC covered copper wire Super enamelled copper wire Single cotton covered copper wire Double cotton covered copper wireQuestion 2 of 41Question 3 of 41 3. 23. What is the function of a centrifugal switch in a split-phase motor? Protects the motor from overloading Maintains constant speed Make and break the starting winding from supply Protects from overcurrentQuestion 3 of 41Question 4 of 41 4. 8. What is the purpose of the capacitor (C) in centrifugal switch speed control method of universal motor? Reduce the sparks on the contacts Protect from the over loading Maintain constant speed Improve the power factorQuestion 4 of 41Question 5 of 41 5. 16. How the direction of rotation of a capacitor start induction run motor is reversed? By changing the supply terminals By interchanging main winding terminals By interchanging both main and auxiliary winding terminals By changing the capacitor connectionsQuestion 5 of 41Question 6 of 41 6. 30. Which type of single-phase motor is used for hard disk drives? Repulsion motor Reluctance motor Hysteresis motor Stepper motorQuestion 6 of 41Question 7 of 41 7. 7. What is the type of A.C single phase motor? Permanent capacitor motor Capacitor start capacitor run motor Induction start induction run motor Capacitor start induction run motorQuestion 7 of 41Question 8 of 41 8. 1. What is the working principle of single phase induction motor? Lenz's law Faraday's laws of electromagnetic induction Joule's law Faraday's laws of electrolysisQuestion 8 of 41Question 9 of 41 9. 31. What is the function of a centrifugal switch in a capacitor start, capacitor run induction motor? Disconnect both windings after reaching 75-80% speed Disconnect the starting capacitor after reaching 75-80% speed Disconnect the starting winding after reaching 75-80% speed Disconnect the running winding after reaching 75-80% speedQuestion 9 of 41Question 10 of 41 10. 13. Which single phase motor is fitted with wound rotor? Capacitor start capacitor run motor Permanent capacitor motor Repulsion motor Shaded pole motorQuestion 10 of 41Question 11 of 41 11. 33. Where is the capacitor connected in a single-phase permanent capacitor motor? In parallel with starting winding In series with starting winding In series with running winding In parallel with running windingQuestion 11 of 41Question 12 of 41 12. 26. Which motor is having half-coil winding? Washing machine Ceiling fan None of the above Mixer GrinderQuestion 12 of 41Question 13 of 41 13. 39. Why a capacitor is connected across centrifugal switch in the centrifugal switch speed control method? To protect from over loading To reduce the sparks in contacts To maintain constant speed To improve the power factorQuestion 13 of 41Question 14 of 41 14. 18. Which type of single phase induction motor is used in food mixer? Repulsion motor Shaded pole motor Universal motor Permanent capacitor motorQuestion 14 of 41Question 15 of 41 15. 36. What is the effect in a repulsion motor, if the magnetic axis shifted to another side? Motor speed will reduce from rated speed Motor speed increases from rated speed Direction of rotation remains same Direction of rotation will changeQuestion 15 of 41Question 16 of 41 16. 32. Which type of single-phase motor has very high starting torque? Universal motor Repulsion start induction run motor Reluctance motor Capacitor start induction run motorQuestion 16 of 41Question 17 of 41 17. 28. Calculate the slot distance for a ceiling fan with 28 slots, 14 poles, and 14 coils in half-coil connection? 120° 90° 180° 240°Question 17 of 41Question 18 of 41 18. 4. Which type of single phase motor is illustrated? Permanent capacitor motor Universal motor Capacitor start capacitor run motor Capacitor start induction run motorQuestion 18 of 41Question 19 of 41 19. 5. Which type of A.C single phase motor is classified under commutator motor type? Stepper motor Repulsion motor Shaded pole motor Permanent capacitor motorQuestion 19 of 41Question 20 of 41 20. 22. Which type of motor has relatively small starting torque? Capacitor start capacitor run motor Resistance start induction run motor Capacitor start induction run motor Universal motorQuestion 20 of 41Question 21 of 41 21. 14. What is the relation between running winding and starting winding of a single phase induction motor with respect to resistance? Both resistances will be equal Running winding is less, starting winding more Running winding is less, starting winding infinity Running winding is more, starting winding lessQuestion 21 of 41Question 22 of 41 22. 12. Which is the application of universal motor? Teleprinter Compressor Food mixer Jet pumpQuestion 22 of 41Question 23 of 41 23. 17. Which single phase motor tapped field speed control method is employed? Shaded pole motor Universal motor Capacitor start induction run motor Capacitor start capacitor run motorQuestion 23 of 41Question 24 of 41 24. 20. Why the hysteresis motor is suitable for sound recording instruments? High efficiency Small in size Less error operation Noiseless operationQuestion 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 stop immediately Starting winding will burn out Motor will run very slow speed Motor will run normallyQuestion 25 of 41Question 26 of 41 26. 27. Why is the running winding placed at the bottom of the core? To get high resistance To get high inductance To get low inductance To get low resistanceQuestion 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 connecting an inductor in series with centrifugal switch By connecting capacitor in series with centrifugal switch By adding compensating winding with armature By connecting capacitor across centrifugal switchQuestion 27 of 41Question 28 of 41 28. 11. What is the function of centrifugal switch in single phase motors? Break the starting winding Protect the motor from over loading Break the running winding Maintain constant speedQuestion 28 of 41Question 29 of 41 29. 15. What is the function of the part marked as 'x' in shaded pole motor? Maintain constant speed Initiate the rotor movement Increase the efficiency Strengthen the magnetic fieldQuestion 29 of 41Question 30 of 41 30. 3. What is the working principle of split phase motor? Lenz's law Faraday's laws of electrolysis Joule's law Faraday's laws of electromagnetic inductionQuestion 30 of 41Question 31 of 41 31. 38. How the direction of rotation of repulsion motors is to be reversed? By interchanging the supply terminals By changing the compensating winding terminals By changing the main winding terminals By shifting the brush-axisQuestion 31 of 41Question 32 of 41 32. 29. What is the application of a shaded pole motor? Ceiling fan Hair dryer Wet grinder Washing machineQuestion 32 of 41Question 33 of 41 33. 2. What is the name of single phase motor? Induction start capacitor run motor Capacitor start capacitor run motor Capacitor start induction run motor Permanent capacitor motorQuestion 33 of 41Question 34 of 41 34. 25. What is the reason to use a permanent capacitor in a fan motor circuit? Controlling electrical interference Lower power consumption Splitting of phase for torque Speed regulationQuestion 34 of 41Question 35 of 41 35. 6. Which method is adopted to start the single phase induction motor? Split phase method Reversal of running coil connection Varying supply voltage method Reversal of input supply terminalsQuestion 35 of 41Question 36 of 41 36. 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 Works normally Reduction in torque Reduction in speedQuestion 36 of 41Question 37 of 41 37. 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 37 of 41Question 38 of 41 38. 34. Which motor is used in a table fan? Shaded pole motor Permanent capacitor motor Eddy current motor Universal motorQuestion 38 of 41Question 39 of 41 39. 10. Which type of AC single phase motor having low starting torque? Capacitor start capacitor run motor Capacitor start induction run motor Induction start induction run motor Resistance start induction run motorQuestion 39 of 41Question 40 of 41 40. 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 40 of 41Question 41 of 41 41. 21. Which motor is preferred for domestic water pumps? Repulsion motor Shaded pole motor Capacitor start motor Universal MotorQuestion 41 of 41 Loading...
