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