ELECTRICIAN 2nd YEAR MODULE – Inverter and UPS ONLINE TEST July 2, 2025July 2, 2025 by admin TRANSLATE THIS QUIZ IN YOUR LANGUAGE इस प्रश्नोत्तरी का अपनी भाषा में अनुवाद करें <<12345678910111213141516171819202122232425262728>> 0% Question 1 of 28 1. Which instrument is used to check short circuit faults in electronic circuit in voltage stabilizer? Ammeter Multimeter Ohmmeter VoltmeterQuestion 1 of 28Question 2 of 28 2. Which is the function of an inverter? Converts A.C voltage into D.C voltage Converts A.C voltage into higher A.C voltage Converts D.C voltage into A.C voltage Converts D.C voltage into higher D.C voltageQuestion 2 of 28Question 3 of 28 3. What are the important stages in a simple inverter? Amplifier and transformer output stages Oscillator and amplifier stages Oscillator and rectifier stages Oscillator, amplifier and transformer output stagesQuestion 3 of 28Question 4 of 28 4. What is the type of A.C voltage stabilizer? Manual stepped voltage stabilizer Constant voltage transformer stabilizer Automatic voltage stabilizer Servo voltage stabilizerQuestion 4 of 28Question 5 of 28 5. What is the reason for having low back up time in UPS? Battery is short circuited Fault in inverter circuit Mains earthing is not proper Ampere hour (A.H) capacity of battery is not sufficientQuestion 5 of 28Question 6 of 28 6. Which transformer is used in servo voltage stabilizer? Toroidal autotransformer Constant voltage transformer Step up transformer Step down transformerQuestion 6 of 28Question 7 of 28 7. Where square wave inverters are used? Computers General lighting TV receiver DVD playersQuestion 7 of 28Question 8 of 28 8. Which principle the constant voltage transformer works? Mutual induction principle Ferro-resonant principle Self induction principle Fall in potential principleQuestion 8 of 28Question 9 of 28 9. Which feedback network is used for automatic voltage stabilizer? Current divider network Voltage divider network Resistance temperature detector network Tapped transformer networkQuestion 9 of 28Question 10 of 28 10. Which is the cause for the fault if the output voltage of UPS is higher than normal? Input voltage is very high Defective feedback circuit Battery get short circuited Relay points are joined togetherQuestion 10 of 28Question 11 of 28 11. Which part in UPS supplies continuous output voltage in case of input voltage failure? Inverter unit Battery unit Rectifier unit Controller unitQuestion 11 of 28Question 12 of 28 12. What is the purpose of output transformer in inverters? Step up input AC Step down input AC Step down AC from amplifier Step up AC from amplifierQuestion 12 of 28Question 13 of 28 13. What is the effect in internal resistance of a discharged cell? Decrease Remain same Becomes zero IncreaseQuestion 13 of 28Question 14 of 28 14. Which electrical device is actuating the voltages in a stepped voltage stabilizer? Autostat Over voltage relay Output transformer Under voltage relayQuestion 14 of 28Question 15 of 28 15. What is the reason for tripping the UPS with full load? Battery charger input fuse blown out Incorrect over load settings Loose connection in battery terminal Main supply failureQuestion 15 of 28Question 16 of 28 16. What is the effect during loading of the cell, the current strength falls and become zero? Buckling Amalgamation Polarization Local actionQuestion 16 of 28Question 17 of 28 17. What is the full form of PWM? Pulse Width Modulation Pulse Wide Modulation Phase Wide Modulation Phase Width ModulationQuestion 17 of 28Question 18 of 28 18. Which term refers that the mass of a substance liberated from an electrolyte by one coulomb of electricity? Electro copying Electro plating Electro chemical equivalent ElectrolysisQuestion 18 of 28Question 19 of 28 19. Which is frequency converter? D.C choppers D.C to A.C converters Rectifiers Cyclo convertersQuestion 19 of 28Question 20 of 28 20. What is the advantage of on-line UPS over offline UPS? Supplies constant power output Free from change over and transition problems Works on single phase or three phase supply It gives constant output frequencyQuestion 20 of 28Question 21 of 28 21. Which electronic circuit is used in an automatic voltage stabilizer to produce constant output voltage? Amplifier circuit Rectifier circuit Oscillator circuit Feedback circuitQuestion 21 of 28Question 22 of 28 22. What is the minimum permissible single phase working voltage, if the declared voltage is 240V as per ISI? 233 V 216 V 211 V 228 VQuestion 22 of 28Question 23 of 28 23. Which type of output transformer is used in automatic voltage stabilizer? Auto transformer Ferrite core type transformer Ring core type transformer Static transformerQuestion 23 of 28Question 24 of 28 24. Which is the application of automatic stepped voltage stabilizer? Pump motor Television Grinder GeyserQuestion 24 of 28Question 25 of 28 25. Calculate the voltage and ampere/hour, if four cells rated as 1.5 V and 8 A.H are in parallel? 6 V and 24 AH 1.5 V and 32 AH 3 V and 16 AH 4.5 V and 8 AHQuestion 25 of 28Question 26 of 28 26. How the hard sulphation defect in secondary cell can be prevented? Provide constant potential method charging Provide freshening charge Provide trickle charging Provide constant current chargingQuestion 26 of 28Question 27 of 28 27. What is the full form of UPS? Uninterrupted Power Supply Universal Power Supply Unregulated Power Supply Uniform Power SupplyQuestion 27 of 28Question 28 of 28 28. How the backup time of UPS can be increased? Maintain battery terminal voltage always 90% of rating Increase the AH capacity of battery Decrease the AH capacity of battery Increase the VA rating of UPSQuestion 28 of 28 Loading...
