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 happens when a person receives a 20mA shock current? Unconsciousness Heart convulsions No sensation Painful shockQuestion 1 of 28Question 2 of 28 2. Where are service connection supply leads connected in a consumer main board? Energy meter Main switch Distribution board IC cut outQuestion 2 of 28Question 3 of 28 3. What type of test is performed in wiring installation? Open circuit test Insulation resistance test between conductors Insulation resistance test between conductors and earth Polarity testQuestion 3 of 28Question 4 of 28 4. What type of test is conducted in domestic wiring installation? Continuity (or) open circuit test Insulation resistance test between conductors and earth Polarity test Insulation resistance test between conductorsQuestion 4 of 28Question 5 of 28 5. Where is system earthing done? Electroplating installation Small industrial installation Generating station Domestic wiring installationQuestion 5 of 28Question 6 of 28 6. Advantage of stranded conductor over solid conductor? Cost is less More insulation resistance Less voltage drop More flexibleQuestion 6 of 28Question 7 of 28 7. Which method is used to reduce earth resistance value in an existing earth pit? Increasing the diameter of the earth electrode Increasing the length of the electrode Adding more sand and charcoal in earth pits Keeping wet condition in earth pits alwaysQuestion 7 of 28Question 8 of 28 8. What is the function of current reverser in earth resistance testers? Changes DC supply to AC Reverses DC polarity Converts AC to DC Reverses generator rotation directionQuestion 8 of 28Question 9 of 28 9. What is the advantage of crimping? Easy replacement Neat appearance Reduces load current Avoids loose connectionsQuestion 9 of 28Question 10 of 28 10. For which electrical equipment are 'L' series type MCBs used? Air conditioners Geysers Halogen lamps LocomotivesQuestion 10 of 28Question 11 of 28 11. Which earth resistance measurement method is illustrated? Current dividing Potential dividing Fall of potential Fall of currentQuestion 11 of 28Question 12 of 28 12. Which instrument is used to test new domestic wiring installation? Multimeter Series-type ohmmeter Shunt-type ohmmeter MeggerQuestion 12 of 28Question 13 of 28 13. How can earth resistance be reduced? Increasing electrode length Reducing pit depth Decreasing electrode length Providing double earthingQuestion 13 of 28Question 14 of 28 14. What is the formula to find voltage drop in an AC single-phase wiring circuit? Voltage drop = I²R volt Voltage drop = I/R volt Voltage drop = IR volt Voltage drop = IR/2 voltQuestion 14 of 28Question 15 of 28 15. Why is system earthing different from equipment earthing? It's associated with current-carrying conductors It protects humans only It's connected to non-current-carrying metal parts It protects from all circuit faultsQuestion 15 of 28Question 16 of 28 16. What determines ohmmeter needle deflection in earth testers? Current in current coil Current in potential coil Handle rotation speed Ratio of currents in two coilsQuestion 16 of 28Question 17 of 28 17. Why is AC required to measure earth resistance using an earth resistance tester? To avoid electrolytic emf interference To increase the voltage drop To regulate the current To decrease the voltage dropQuestion 17 of 28Question 18 of 28 18. Which principle does the earth resistance tester work on? Fall of potential method Mutual induction Self induction Fleming's left hand ruleQuestion 18 of 28Question 19 of 28 19. What causes lamps to glow dim and motors to run slow in domestic wiring? High value series resistance fault Open circuit in earth conductor Short circuit between conductors Open circuit in neutral lineQuestion 19 of 28Question 20 of 28 20. What is the maximum permissible load for a power sub-circuit as per IE rules? 1500 Watt 3000 Watt 800 Watt 2000 WattQuestion 20 of 28Question 21 of 28 21. How to control harmonic distortions in neutral connections per IE rules? Increasing conductor size Providing plate earthing Providing parallel earthing Earthing through impedanceQuestion 21 of 28Question 22 of 28 22. What is the permissible leakage current in domestic wiring installation? 1/5000 × Full load current 1/5 × Full load current 1/500 × Full load current 1/50 × Full load currentQuestion 22 of 28Question 23 of 28 23. 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 23 of 28Question 24 of 28 24. Why is AC supplied for earth resistance measurement? Reduce meter current Provide electrostatic shield Protect meter coils Avoid electrolytic emf interferenceQuestion 24 of 28Question 25 of 28 25. What test is carried out using a megger? Polarity test Earth conductor continuity test Earth electrode resistance test Insulation resistance testQuestion 25 of 28Question 26 of 28 26. What is the megger reading in a dead short wiring installation? 0 MΩ Infinity 1 MΩ 500 MΩQuestion 26 of 28Question 27 of 28 27. In which wiring installation is system earthing done? Commercial wiring Domestic wiring Substations Godown wiringQuestion 27 of 28Question 28 of 28 28. 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 28 of 28 Loading...