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