ELECTRICIAN 2nd YEAR MODULE – Synchronous Motor and MG Set July 2, 2025July 1, 2025 by admin TRANSLATE THIS QUIZ IN YOUR LANGUAGE इस प्रश्नोत्तरी का अपनी भाषा में अनुवाद करें <<123456789101112131415161718>> 0% Question 1 of 18 1. Why the synchronous motor fails to run at synchronous speed? Insufficient excitation Short in damper winding Open in damper winding Defective pony motorQuestion 1 of 18Question 2 of 18 2. What is the advantage of motor generator set? Low maintenance required High efficiency Noiseless DC output voltage can be easily controlledQuestion 2 of 18Question 3 of 18 3. How the synchronous motor is used as a synchronous condenser? Varying stator voltage in motor Varying stator current in motor Varying the rotor excitation Varying the motor loadQuestion 3 of 18Question 4 of 18 4. How synchronous motor works as a power factor corrector? Varying the line voltage Varying the field excitation Increasing the speed of motor Decreasing the speed of motorQuestion 4 of 18Question 5 of 18 5. What is the function of inverter? Convert A.C to D.C Convert pulsating DC into pure D.C Convert D.C to A.C Smoothening A.C sine waveQuestion 5 of 18Question 6 of 18 6. Why exciter is essential to run a synchronous motor? Reduce the losses in motor Improve the power factor Carry more load in motor Run the motor at synchronous speedQuestion 6 of 18Question 7 of 18 7. What is the purpose of damper winding in a synchronous motor at starting? Produce a high magnetic-field to maintain a constant speed Produces torque and runs near in synchronous speed Produce high current to start rotate the motor Produce high voltage to initiate the rotationQuestion 7 of 18Question 8 of 18 8. What is the name of the converter? Rotary converter Mercury arc rectifier Silicon controlled rectifier Metal rectifierQuestion 8 of 18Question 9 of 18 9. What is the function of the part marked as 'X' of the rotary converter? Reduces voltage drop Collects the delivered direct current Helps to deliver without noise Converts AC to DCQuestion 9 of 18Question 10 of 18 10. Which converting device can be over loaded? Mercury arc rectifier Rectifier unit Rotary converter Motor generator setQuestion 10 of 18Question 11 of 18 11. Which converter is having high efficiency? SCR converter Mercury arc rectifier Motor generator set Rotary converterQuestion 11 of 18Question 12 of 18 12. What is the function of damper windings in synchronous motor? Maintain constant speed Start the synchronous motor Maintain power factor Excite the field windingQuestion 12 of 18Question 13 of 18 13. Which is the main application of synchronous motor? Elevators Power factor correction device Paper rolling mills AC to DC converterQuestion 13 of 18Question 14 of 18 14. Which application requires only DC? Stepping up of voltage Operating induction motor Electroplating Operating repulsion motorQuestion 14 of 18Question 15 of 18 15. Which acts as both inverter and converter? Synchronous converter Semi conductor diode Mercury arc rectifier Metal rectifierQuestion 15 of 18Question 16 of 18 16. Why the LED's are avoided as converters in rectifier diodes? Heavily doped device Very low power device Very sensitive to temperature Designed for light emittingQuestion 16 of 18Question 17 of 18 17. Why D.C supply is necessary for synchronous motor operation? Start the motor initially Reduce the losses Run the motor at synchronous speed Run the motor with over loadQuestion 17 of 18Question 18 of 18 18. What is the name of the converter? Metal rectifier Mercury arc rectifier Rotary converter Motor-Generator setQuestion 18 of 18 Loading...
