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 is frequency converter? Rectifiers D.C to A.C converters D.C choppers Cyclo convertersQuestion 1 of 28Question 2 of 28 2. Calculate the voltage and ampere/hour, if four cells rated as 1.5 V and 8 A.H are in parallel? 4.5 V and 8 AH 6 V and 24 AH 3 V and 16 AH 1.5 V and 32 AHQuestion 2 of 28Question 3 of 28 3. Where square wave inverters are used? DVD players Computers TV receiver General lightingQuestion 3 of 28Question 4 of 28 4. Which electrical device is actuating the voltages in a stepped voltage stabilizer? Over voltage relay Autostat Output transformer Under voltage relayQuestion 4 of 28Question 5 of 28 5. What is the reason for tripping the UPS with full load? Battery charger input fuse blown out Main supply failure Incorrect over load settings Loose connection in battery terminalQuestion 5 of 28Question 6 of 28 6. Which type of output transformer is used in automatic voltage stabilizer? Static transformer Ferrite core type transformer Ring core type transformer Auto transformerQuestion 6 of 28Question 7 of 28 7. What is the advantage of on-line UPS over offline UPS? Supplies constant power output Works on single phase or three phase supply It gives constant output frequency Free from change over and transition problemsQuestion 7 of 28Question 8 of 28 8. What is the type of A.C voltage stabilizer? Servo voltage stabilizer Automatic voltage stabilizer Constant voltage transformer stabilizer Manual stepped voltage stabilizerQuestion 8 of 28Question 9 of 28 9. How the backup time of UPS can be increased? Increase the AH capacity of battery Decrease the AH capacity of battery Maintain battery terminal voltage always 90% of rating Increase the VA rating of UPSQuestion 9 of 28Question 10 of 28 10. What is the full form of PWM? Pulse Wide Modulation Pulse Width Modulation Phase Width Modulation Phase Wide ModulationQuestion 10 of 28Question 11 of 28 11. What is the effect in internal resistance of a discharged cell? Increase Decrease Remain same Becomes zeroQuestion 11 of 28Question 12 of 28 12. 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 12 of 28Question 13 of 28 13. What is the full form of UPS? Unregulated Power Supply Universal Power Supply Uniform Power Supply Uninterrupted Power SupplyQuestion 13 of 28Question 14 of 28 14. What is the effect during loading of the cell, the current strength falls and become zero? Local action Buckling Polarization AmalgamationQuestion 14 of 28Question 15 of 28 15. Which feedback network is used for automatic voltage stabilizer? Tapped transformer network Voltage divider network Resistance temperature detector network Current divider networkQuestion 15 of 28Question 16 of 28 16. What are the important stages in a simple inverter? Oscillator, amplifier and transformer output stages Oscillator and amplifier stages Amplifier and transformer output stages Oscillator and rectifier stagesQuestion 16 of 28Question 17 of 28 17. What is the reason for having low back up time in UPS? Mains earthing is not proper Battery is short circuited Fault in inverter circuit Ampere hour (A.H) capacity of battery is not sufficientQuestion 17 of 28Question 18 of 28 18. Which is the function of an inverter? Converts D.C voltage into higher D.C voltage Converts A.C voltage into D.C voltage Converts A.C voltage into higher A.C voltage Converts D.C voltage into A.C voltageQuestion 18 of 28Question 19 of 28 19. Which is the application of automatic stepped voltage stabilizer? Television Geyser Grinder Pump motorQuestion 19 of 28Question 20 of 28 20. What is the minimum permissible single phase working voltage, if the declared voltage is 240V as per ISI? 228 V 233 V 211 V 216 VQuestion 20 of 28Question 21 of 28 21. Which part in UPS supplies continuous output voltage in case of input voltage failure? Controller unit Inverter unit Battery unit Rectifier unitQuestion 21 of 28Question 22 of 28 22. Which principle the constant voltage transformer works? Self induction principle Fall in potential principle Ferro-resonant principle Mutual induction principleQuestion 22 of 28Question 23 of 28 23. 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 23 of 28Question 24 of 28 24. How the hard sulphation defect in secondary cell can be prevented? Provide trickle charging Provide freshening charge Provide constant current charging Provide constant potential method chargingQuestion 24 of 28Question 25 of 28 25. What is the purpose of output transformer in inverters? Step up AC from amplifier Step down AC from amplifier Step down input AC Step up input ACQuestion 25 of 28Question 26 of 28 26. Which transformer is used in servo voltage stabilizer? Constant voltage transformer Step up transformer Step down transformer Toroidal autotransformerQuestion 26 of 28Question 27 of 28 27. Which electronic circuit is used in an automatic voltage stabilizer to produce constant output voltage? Rectifier circuit Amplifier circuit Feedback circuit Oscillator circuitQuestion 27 of 28Question 28 of 28 28. Which instrument is used to check short circuit faults in electronic circuit in voltage stabilizer? Voltmeter Multimeter Ammeter OhmmeterQuestion 28 of 28 Loading...
