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