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