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