2 Jul 2025 ELECTRICIAN 2nd YEAR MODULE – AC Single Phase Motor ONLINE TEST by admin | posted in: nimi online test, nimionilne, NSQF, NSQF LEVEL 4, online test AITT | 0 TRANSLATE THIS QUIZ IN YOUR LANGUAGE इस प्रश्नोत्तरी का अपनी भाषा में अनुवाद करें <<1234567891011121314151617181920212223242526272829303132333435363738394041>> 0% Question 1 of 41 1. 3. What is the working principle of split phase motor? Lenz's law Faraday's laws of electrolysis Faraday's laws of electromagnetic induction Joule's lawQuestion 1 of 41Question 2 of 41 2. 27. Why is the running winding placed at the bottom of the core? To get high inductance To get low resistance To get low inductance To get high resistanceQuestion 2 of 41Question 3 of 41 3. 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 3 of 41Question 4 of 41 4. 26. Which motor is having half-coil winding? None of the above Mixer Grinder Ceiling fan Washing machineQuestion 4 of 41Question 5 of 41 5. 37. What is the effect if the centrifugal switch is not disconnected after the motor starts? Starting winding will burn out Motor will run very slow speed Motor will stop immediately Motor will run normallyQuestion 5 of 41Question 6 of 41 6. 28. Calculate the slot distance for a ceiling fan with 28 slots, 14 poles, and 14 coils in half-coil connection? 240° 180° 90° 120°Question 6 of 41Question 7 of 41 7. 16. How the direction of rotation of a capacitor start induction run motor is reversed? By changing the capacitor connections By interchanging both main and auxiliary winding terminals By interchanging main winding terminals By changing the supply terminalsQuestion 7 of 41Question 8 of 41 8. 20. Why the hysteresis motor is suitable for sound recording instruments? Noiseless operation Small in size High efficiency Less error operationQuestion 8 of 41Question 9 of 41 9. 21. Which motor is preferred for domestic water pumps? Shaded pole motor Repulsion motor Capacitor start motor Universal MotorQuestion 9 of 41Question 10 of 41 10. 7. What is the type of A.C single phase motor? Capacitor start induction run motor Permanent capacitor motor Capacitor start capacitor run motor Induction start induction run motorQuestion 10 of 41Question 11 of 41 11. 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 11 of 41Question 12 of 41 12. 23. What is the function of a centrifugal switch in a split-phase motor? Protects from overcurrent Protects the motor from overloading Make and break the starting winding from supply Maintains constant speedQuestion 12 of 41Question 13 of 41 13. 5. Which type of A.C single phase motor is classified under commutator motor type? Permanent capacitor motor Shaded pole motor Stepper motor Repulsion motorQuestion 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. 10. Which type of AC single phase motor having low starting torque? Resistance start induction run motor Induction start induction run motor Capacitor start induction run motor Capacitor start capacitor run motorQuestion 15 of 41Question 16 of 41 16. 29. What is the application of a shaded pole motor? Ceiling fan Washing machine Wet grinder Hair dryerQuestion 16 of 41Question 17 of 41 17. 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 17 of 41Question 18 of 41 18. 12. Which is the application of universal motor? Food mixer Compressor Teleprinter Jet pumpQuestion 18 of 41Question 19 of 41 19. 30. Which type of single-phase motor is used for hard disk drives? Reluctance motor Hysteresis motor Repulsion motor Stepper motorQuestion 19 of 41Question 20 of 41 20. 13. Which single phase motor is fitted with wound rotor? Repulsion motor Capacitor start capacitor run motor Shaded pole motor Permanent capacitor motorQuestion 20 of 41Question 21 of 41 21. 8. What is the purpose of the capacitor (C) in centrifugal switch speed control method of universal motor? Maintain constant speed Reduce the sparks on the contacts Protect from the over loading Improve the power factorQuestion 21 of 41Question 22 of 41 22. 2. What is the name of single phase motor? Capacitor start induction run motor Induction start capacitor run motor Capacitor start capacitor run motor Permanent capacitor motorQuestion 22 of 41Question 23 of 41 23. 11. What is the function of centrifugal switch in single phase motors? Maintain constant speed Protect the motor from over loading Break the running winding Break the starting windingQuestion 23 of 41Question 24 of 41 24. 34. Which motor is used in a table fan? Permanent capacitor motor Eddy current motor Shaded pole motor Universal motorQuestion 24 of 41Question 25 of 41 25. 18. Which type of single phase induction motor is used in food mixer? Universal motor Repulsion motor Shaded pole motor Permanent capacitor motorQuestion 25 of 41Question 26 of 41 26. 19. What is the angular displacement between starting and running winding of a single phase induction motor? 90 electrical degree 45 electrical degree 60 electrical degree 120 electrical degreeQuestion 26 of 41Question 27 of 41 27. 33. Where is the capacitor connected in a single-phase permanent capacitor motor? In series with starting winding In parallel with starting winding In series with running winding In parallel with running windingQuestion 27 of 41Question 28 of 41 28. 39. Why a capacitor is connected across centrifugal switch in the centrifugal switch speed control method? To improve the power factor To maintain constant speed To protect from over loading To reduce the sparks in contactsQuestion 28 of 41Question 29 of 41 29. 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 in series with centrifugal switch By connecting capacitor across centrifugal switchQuestion 29 of 41Question 30 of 41 30. 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 Reduction in torque Runs with very high speedQuestion 30 of 41Question 31 of 41 31. 9. Which type of winding wire is used for rewinding submersible pumps? Super enamelled copper wire PVC covered copper wire Single cotton covered copper wire Double cotton covered copper wireQuestion 31 of 41Question 32 of 41 32. Here's the Aiken format for questions 35-41 with explanations: Motor runs in very high speed Motor runs and takes more current at no load Motor will not run Motor runs slowly. What is the effect, if coil group connection is wrongly connected in a single phase motor rewinding?Question 32 of 41Question 33 of 41 33. 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 33 of 41Question 34 of 41 34. 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 34 of 41Question 35 of 41 35. 38. How the direction of rotation of repulsion motors is to be reversed? By shifting the brush-axis By changing the main winding terminals By interchanging the supply terminals By changing the compensating winding terminalsQuestion 35 of 41Question 36 of 41 36. 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 36 of 41Question 37 of 41 37. 6. Which method is adopted to start the single phase induction motor? Reversal of running coil connection Split phase method Reversal of input supply terminals Varying supply voltage methodQuestion 37 of 41Question 38 of 41 38. 25. What is the reason to use a permanent capacitor in a fan motor circuit? Controlling electrical interference Splitting of phase for torque Speed regulation Lower power consumptionQuestion 38 of 41Question 39 of 41 39. 4. Which type of single phase motor is illustrated? Universal motor Capacitor start capacitor run motor Permanent capacitor motor Capacitor start induction run motorQuestion 39 of 41Question 40 of 41 40. 15. What is the function of the part marked as 'x' in shaded pole motor? Maintain constant speed Increase the efficiency Initiate the rotor movement Strengthen the magnetic fieldQuestion 40 of 41Question 41 of 41 41. 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 41 of 41 Loading...
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