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. What type of test is performed in wiring installation? Insulation resistance test between conductors and earth Polarity test Insulation resistance test between conductors Open circuit testQuestion 1 of 28Question 2 of 28 2. Why is AC supplied for earth resistance measurement? Avoid electrolytic emf interference Provide electrostatic shield Protect meter coils Reduce meter currentQuestion 2 of 28Question 3 of 28 3. What is the maximum permissible load for a power sub-circuit as per IE rules? 800 Watt 1500 Watt 3000 Watt 2000 WattQuestion 3 of 28Question 4 of 28 4. Where are service connection supply leads connected in a consumer main board? IC cut out Distribution board Main switch Energy meterQuestion 4 of 28Question 5 of 28 5. What happens when a person receives a 20mA shock current? Unconsciousness Painful shock Heart convulsions No sensationQuestion 5 of 28Question 6 of 28 6. Which earth resistance measurement method is illustrated? Fall of potential Fall of current Potential dividing Current dividingQuestion 6 of 28Question 7 of 28 7. For which electrical equipment are 'L' series type MCBs used? Locomotives Halogen lamps Geysers Air conditionersQuestion 7 of 28Question 8 of 28 8. What is the minimum size of copper earth continuity conductor used in single-phase domestic wiring as per BIS? 3.5 Sq.mm 1.5 Sq.mm 2.5 Sq.mm 3 Sq.mmQuestion 8 of 28Question 9 of 28 9. Which principle does the earth resistance tester work on? Mutual induction Fall of potential method Fleming's left hand rule Self inductionQuestion 9 of 28Question 10 of 28 10. What determines ohmmeter needle deflection in earth testers? Handle rotation speed Ratio of currents in two coils Current in current coil Current in potential coilQuestion 10 of 28Question 11 of 28 11. What type of test is conducted in domestic wiring installation? Polarity test Insulation resistance test between conductors Continuity (or) open circuit test Insulation resistance test between conductors and earthQuestion 11 of 28Question 12 of 28 12. How to control harmonic distortions in neutral connections per IE rules? Providing parallel earthing Providing plate earthing Increasing conductor size Earthing through impedanceQuestion 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 Adding more sand and charcoal in earth pits Increasing the diameter of the earth electrode Increasing the length of the electrodeQuestion 13 of 28Question 14 of 28 14. What is the formula to find voltage drop in an AC single-phase wiring circuit? Voltage drop = I/R volt Voltage drop = I²R volt Voltage drop = IR/2 volt Voltage drop = IR voltQuestion 14 of 28Question 15 of 28 15. What is the advantage of crimping? Neat appearance Easy replacement Avoids loose connections Reduces load currentQuestion 15 of 28Question 16 of 28 16. Why is AC required to measure earth resistance using an earth resistance tester? To avoid electrolytic emf interference To increase the voltage drop To decrease the voltage drop To regulate the currentQuestion 16 of 28Question 17 of 28 17. Advantage of stranded conductor over solid conductor? Less voltage drop Cost is less More flexible More insulation resistanceQuestion 17 of 28Question 18 of 28 18. 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 18 of 28Question 19 of 28 19. Which instrument is used to test new domestic wiring installation? Shunt-type ohmmeter Multimeter Series-type ohmmeter MeggerQuestion 19 of 28Question 20 of 28 20. What is the megger reading in a dead short wiring installation? 1 MΩ 0 MΩ 500 MΩ InfinityQuestion 20 of 28Question 21 of 28 21. What test is carried out using a megger? Earth electrode resistance test Polarity test Earth conductor continuity test Insulation resistance testQuestion 21 of 28Question 22 of 28 22. How can earth resistance be reduced? Increasing electrode length Providing double earthing Reducing pit depth Decreasing electrode lengthQuestion 22 of 28Question 23 of 28 23. What causes lamps to glow dim and motors to run slow in domestic wiring? Short circuit between conductors Open circuit in neutral line Open circuit in earth conductor High value series resistance faultQuestion 23 of 28Question 24 of 28 24. What is the permissible leakage current in domestic wiring installation? 1/5000 × Full load current 1/50 × Full load current 1/5 × Full load current 1/500 × Full load currentQuestion 24 of 28Question 25 of 28 25. What is the function of current reverser in earth resistance testers? Changes DC supply to AC Converts AC to DC Reverses DC polarity Reverses generator rotation directionQuestion 25 of 28Question 26 of 28 26. Why does megger's pointer not stabilize at zero when unused? No controlling torque Air friction damping Deflecting torque proportional to current Deflecting torque proportional to current²Question 26 of 28Question 27 of 28 27. In which wiring installation is system earthing done? Substations Godown wiring Domestic wiring Commercial wiringQuestion 27 of 28Question 28 of 28 28. Where is system earthing done? Electroplating installation Small industrial installation Generating station Domestic wiring installationQuestion 28 of 28 Loading...
