30 Jun 2025 ELECTRICIAN 1st YEAR MODULE – Wiring Installation and Earthing by admin | posted in: nimi online test, NSQF, NSQF LEVEL 4 | 0 TRANSLATE THIS QUIZ IN YOUR LANGUAGE इस प्रश्नोत्तरी का अपनी भाषा में अनुवाद करें <<12345678910111213141516171819202122232425262728>> 0% Question 1 of 28 1. What determines ohmmeter needle deflection in earth testers? Current in potential coil Current in current coil Ratio of currents in two coils Handle rotation speedQuestion 1 of 28Question 2 of 28 2. What is the advantage of crimping? Easy replacement Avoids loose connections Reduces load current Neat appearanceQuestion 2 of 28Question 3 of 28 3. What is the maximum permissible load for a power sub-circuit as per IE rules? 800 Watt 2000 Watt 3000 Watt 1500 WattQuestion 3 of 28Question 4 of 28 4. Which principle does the earth resistance tester work on? Fall of potential method Fleming's left hand rule Mutual induction Self inductionQuestion 4 of 28Question 5 of 28 5. Advantage of stranded conductor over solid conductor? More insulation resistance Cost is less Less voltage drop More flexibleQuestion 5 of 28Question 6 of 28 6. Why is AC required to measure earth resistance using an earth resistance tester? To regulate the current To avoid electrolytic emf interference To decrease the voltage drop To increase the voltage dropQuestion 6 of 28Question 7 of 28 7. Why does megger's pointer not stabilize at zero when unused? Air friction damping Deflecting torque proportional to current² No controlling torque Deflecting torque proportional to currentQuestion 7 of 28Question 8 of 28 8. For which electrical equipment are 'L' series type MCBs used? Halogen lamps Locomotives Air conditioners GeysersQuestion 8 of 28Question 9 of 28 9. How can earth resistance be reduced? Providing double earthing Decreasing electrode length Reducing pit depth Increasing electrode lengthQuestion 9 of 28Question 10 of 28 10. How to control harmonic distortions in neutral connections per IE rules? Earthing through impedance Providing parallel earthing Providing plate earthing Increasing conductor sizeQuestion 10 of 28Question 11 of 28 11. What is the function of current reverser in earth resistance testers? Reverses DC polarity Reverses generator rotation direction Converts AC to DC Changes DC supply to ACQuestion 11 of 28Question 12 of 28 12. Why is AC supplied for earth resistance measurement? Protect meter coils Reduce meter current Provide electrostatic shield Avoid electrolytic emf interferenceQuestion 12 of 28Question 13 of 28 13. Where is system earthing done? Generating station Domestic wiring installation Electroplating installation Small industrial installationQuestion 13 of 28Question 14 of 28 14. Why is system earthing different from equipment earthing? It protects from all circuit faults It's associated with current-carrying conductors It's connected to non-current-carrying metal parts It protects humans onlyQuestion 14 of 28Question 15 of 28 15. What is the permissible leakage current in domestic wiring installation? 1/500 × Full load current 1/5000 × Full load current 1/5 × Full load current 1/50 × Full load currentQuestion 15 of 28Question 16 of 28 16. What happens when a person receives a 20mA shock current? Painful shock No sensation Unconsciousness Heart convulsionsQuestion 16 of 28Question 17 of 28 17. What type of test is performed in wiring installation? Polarity test Open circuit test Insulation resistance test between conductors Insulation resistance test between conductors and earthQuestion 17 of 28Question 18 of 28 18. What is the minimum size of copper earth continuity conductor used in single-phase domestic wiring as per BIS? 2.5 Sq.mm 1.5 Sq.mm 3.5 Sq.mm 3 Sq.mmQuestion 18 of 28Question 19 of 28 19. What type of test is conducted in domestic wiring installation? Continuity (or) open circuit test Polarity test Insulation resistance test between conductors Insulation resistance test between conductors and earthQuestion 19 of 28Question 20 of 28 20. What is the formula to find voltage drop in an AC single-phase wiring circuit? Voltage drop = IR volt Voltage drop = I/R volt Voltage drop = I²R volt Voltage drop = IR/2 voltQuestion 20 of 28Question 21 of 28 21. What is the megger reading in a dead short wiring installation? 0 MΩ 500 MΩ 1 MΩ InfinityQuestion 21 of 28Question 22 of 28 22. Which earth resistance measurement method is illustrated? Fall of potential Current dividing Potential dividing Fall of currentQuestion 22 of 28Question 23 of 28 23. Which method is used to reduce earth resistance value in an existing earth pit? Increasing the length of the electrode Keeping wet condition in earth pits always Increasing the diameter of the earth electrode Adding more sand and charcoal in earth pitsQuestion 23 of 28Question 24 of 28 24. Which instrument is used to test new domestic wiring installation? Series-type ohmmeter Shunt-type ohmmeter Megger MultimeterQuestion 24 of 28Question 25 of 28 25. What test is carried out using a megger? Earth conductor continuity test Earth electrode resistance test Insulation resistance test Polarity testQuestion 25 of 28Question 26 of 28 26. In which wiring installation is system earthing done? Substations Commercial wiring Godown wiring Domestic wiringQuestion 26 of 28Question 27 of 28 27. What causes lamps to glow dim and motors to run slow in domestic wiring? Open circuit in neutral line Short circuit between conductors Open circuit in earth conductor High value series resistance faultQuestion 27 of 28Question 28 of 28 28. Where are service connection supply leads connected in a consumer main board? Energy meter Main switch IC cut out Distribution boardQuestion 28 of 28 Loading...
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