Electrical Wiring Question & Answers February 28, 2023 By Wat Electrical This article lists 100 Electrical Wiring MCQs for engineering students. All the Electrical Wiring Questions & Answers given below include a hint and a link wherever possible to the relevant topic. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up on the fundamentals of Electrical Wiring. The electrical wires are specified by size, insulation conductor material, and the number of cores. The insulating materials used in electrical wires are vulcanized Indian rubber and polyvinyl chloride. The wires may be multi-strand or single-strand. The appearance, cost, safety, durability, accessibility, maintenance cost, and mechanical safety are the factors affecting the choice of wiring. The life of the installation, future extensions or alterations, and construction of the building are the points to be considered while selecting any system of wiring. The loose connection in an electrical wiring fault comes from improper installation, aging, or damaged wires. The flickering lights, intermittent power to devices, overheating, and arcing are the effects of a loose connection in an electrical wiring. The loose connection, damaged insulation, over-lamping, reverse polarity, open ground, and overcrowded wiring are the electrical wiring faults. The rating of the lamp, fan, socket outlet point, and arrangement of apparatus on the switchboard is the general requirements of an electrical installation. 1). What are the factors affecting the choice of wiring? Maintenance cost Mechanical safety Accessibility All of the above Hint 2). What are the advantages of cleat wiring? Fault can be easily identified Poor appearance Less safety Can't use for permanent installation Hint 3). In which one of the following wiring, the repair is difficult? Conduit wiring Batten wiring Cleat wiring Casing capping wiring Hint 4). The mineral insulated copper covered wire used in __________________? Factories Mines Boiler All of the above Hint 5). What is the standard form of EPR? Ethylene Propylene Rubber Ethylene Polyethylene Rubber Ethylene Propylene Resistor Ethylene Polymerization Rubber Hint 6). The number of cores is one in _________________ cable? Multi-core Single core Coaxial cables Fiber optic cables Hint 7). Which one of the following is a type of distribution system according to the type of construction? Ring main system Radial system Interconnected system Overhead system Hint 8). In which one of the following substations the space required is more? Indoor Outdoor Transformer Switching Hint Read more about Transformer 9). Which one of the following is a type of substation according to the service requirement? Power factor correction substation Indoor substation Outdoor substation Pole mounted substation Hint 10). What is the standard form of RNMC? Rigid Non-metallic Conduit Rigid Non-metallic Conductor Rigid Non-metallic Controller Rigid Non-metallic Commutator Hint 11). The voltage range of screened cables is up to __________________ KV? 11KV 22KV to 66KV 66KV 100KV Hint 12). The relative permittivity of a rubber is varying between ___________________? 2 and 3 4 and 5 6 and 7 8 and 9 Hint 13). The cross-linked poly ethene cables are suitable up to voltages of ___________________? 15 KV 5 KV 10 KV 30 KV Hint 14). Which one of the following cables is designed by H. Hochstadter? S.L type cables H – type cables Super tension cables Extra high-tension cables Hint 15). What is the standard form of IMC? Intermediate Metallic Conduit Internal Metallic Conductor Integral Metallic Controller Intermediate Metallic Commutator Hint 16). How many types of oil filled cables are there? Two Three Six Eight Hint 17). What is the standard form of GIC? Gas Insulated Cables Gas Insulated Conductor Gas Insulated Controller Gas Insulated Commutator Hint 18). The current measurement is a detection in _____________________ electrical fault? Short circuit Open circuit Ground fault Overload fault Hint 19). The visual inspection is a detection in ___________________ type of an electrical fault? Short circuit Open circuit Ground fault Overload fault Hint 20). What is the standard form of ENT? Electro-mechanical Non-metallic Tubing Electrical Non-metallic Tubing Electrical Non-metallic Transformer Electrical Non-metallic Transistor Hint 21). The lightning strikes, power surges, or faulty equipment are the causes of ___________________ fault type? Over voltage Under voltage Ground Open circuit Hint 22). Which one of the following electrical wiring faults causes improper installation, aging, or damaged wires? Loose connection Damaged insulation Over lamping Reverse polarity Hint 23). If the wire Guage is ten, then the diameter is ____________________ mm? 2.59 mm 2.05 mm 1.63 mm 1.29 mm Hint 24). Which one of the following types of wiring is less expensive and poor in corrosion resistance? Copper clad aluminium wiring Pure copper wiring Aluminium wiring None of the above Hint 25). What is the standard form of RPVC? Rigid Polyvinyl Conductor Rigid Polyvinyl Controller Rigid Polyvinyl Commutator Rigid Polyvinyl Chloride Hint Electrical Wiring MCQ for Exams 26). Which one of the following types of wiring is suitable for low to medium voltage applications? Copper clad aluminium wiring Pure copper wiring Solid wire Sranded wire Hint 27). When the conduit size is ½" then the maximum number of wires are ____________________? One Two Four Six Hint 28). What is the standard form of MWG? Metric Wire Galvanometer Metric Wire Gauge Metric Wire Glass Metric Wire Gun Hint 29). The voltage rating varies by insulation type in ________________ wiring? Copper clad aluminium wiring Aluminium wiring Copper wiring All of the above Hint 30). What is the standard form of EMT? Electro-mechanical Metallic Tubing Electrical Metallic Tubing Electrical Metallic Transformer Electrical Metallic Transistor Hint 31). The conductivity of an aluminium wiring is _________________siemens/meter? 35.0*10^2 35.0*10^3 35.0*10^4 35.0*10^6 Hint 32). The resistance of copper wiring is _________________ ohms/kilometre? 0.0181 ohms/kilometre 10 ohms/kilometre 70 ohms/kilometre 50 ohms/kilometre Hint 33). Which one of the following electrical wirings is less flexible than stranded wire? Copper Aluminium Copper clad aluminium None of the above Hint 34). The resistance of copper clad aluminium wiring is ___________________ ohms/kilometre? 0.0251 ohms/kilometre 10 ohms/kilometre 70 ohms/kilometre 50 ohms/kilometre Hint 35). What is the standard form of TRS? Transformer Rubber Sheathed Transistor Rubber Sheathed Tough Resistor Sheathed Tough Rubber Sheathed Hint 36). When the conduit size is 3/4" then the maximum number of wires are ____________________? One Two Four Six Hint 37). What is the standard form of SWG? Standard Wire Galvanometer Standard Wire Gauge Standard Wire Glass Standard Wire Gun Hint 38). Which one of the following wirings typically used in metric sizes? Aluminum Standard Copper clad aluminum Solid wire Hint 39). The ampacity varies by gauge and insulation type in _______________ wiring? Copper Aluminum Copper clad aluminum All of the above Hint 40). What is the standard form of GRC? Galvanized Rigid Commutator Galvanized Rigid Conductor Galvanized Rigid Controller Galvanized Rigid Conduit Hint 41). Which one of the following is a type of wiring made from aluminium? Aluminum wiring Copper wiring Copper clad aluminum wiring Solid wiring Hint 42). What is the standard form of CCA? Copper Controller Aluminum Controller Clad Aluminum Copper Clad Armature Copper Clad Aluminum Hint 43). The copper wiring conductivity is ________________ siemens/meter? 5.80*10^6 5.80*10^3 5.80*10^2 5.80*10^8 Hint 44). The conductivity of copper clad aluminum wiring is __________________ siemens/meter? 5.80*10^6 5.80*10^3 40.0*10^6 5.80*10^8 Hint 45). What is the standard form of CTS? Controller Tyre Sheathed Commutator Tyre Sheathed Cab Tyre Sheathed Conduit Tyre Sheathed Hint 46). The insulation resistivity of rubber is 10 exp _______________? 17 ohm cm 1 ohm cm 10 ohm cm 1.2 ohm cm Hint 47). The cross-linked poly ethene cables has temperature range beyond ___________________? 50 –100 C 50 –200 C 20 –30 C 250 –300 C Hint 48). The time required for erection is more in ____________________ substation? Indoor Outdoor Both a and b None of the above Hint 49). What is the standard form of SBR? Styrene Butadiene Rubber Sampler Butadiene Rubber Single Butadiene Rubber Semiconductor Butadiene Rubber Hint 50). Which one of the following is a type of metallic tubing? EMT RNMC ENT GRC Hint Electrical Wiring MCQ for Interviews 51). What is the standard form of ICDP? Iron Commutator Double Pole Iron Controller Double Pole Iron Conduit Double Pole Iron Clad Double Pole Hint 52). What are the disadvantages of cleat wiring? Fault can be easily identified Expansion of wiring is possible Can't use for permanent installation All of the above Hint 53). Which one of the following types of wiring life span is short? Cleat wiring Casing capping wiring Batten wiring Conduit wiring Hint 54). What is the standard form of MICC? Mineral Insulated Chloride Covered Mineral Integral Controller Covered Mineral Integral Copper Covered Mineral Insulated Copper Covered Hint 55). Which one of the following is a low gauge conduit? Class A conduit Class B conduit Both a and b None of the above Hint 56). ___________________ are the general requirements of an electrical installation? Layout wiring Conductors Sub-circuits All of the above Hint 57). What is the standard form of AWG? American Wire Gauge Analog Wire Gauge Armature Wire Gauge American Wire Galvanometer Hint 58). Which one of the following types of wiring cost is low? Casing capping wiring Batten wiring Conduit wiring Cleat wiring Hint 59). In which one of the following types of wiring the installation is very easy? Casing capping wiring Batten wiring Cleat wiring Conduit wiring Hint 60). Which one of the following is a type of non-metallic conduit? EMT GRC ENT Both a and b Hint 61). What is the standard form of ICTP? Iron Commutator Tripple Pole Iron Controller Tripple Pole Iron Conduit Tripple Pole Iron Clad Tripple Pole Hint 62). The number of cores is two or more in _________________ cable? Multi-core Single core Coaxial cables Fiber optic cables Hint 63). Which one of the following is a type of distribution system according to the nature of current? AC distribution system Radial system Ring main system Overhead system Hint 64). What is the standard form of TMDS? Transition Minimized Differential Signalling Transition Minimized Differential Sampler Transformer Minimized Differential Signalling Transistor Minimized Differential Signalling Hint 65). Which one of the following is a high gauge conduit? Class A conduit Class B conduit Both a and b None of the above Hint 66). What are the disadvantages of batten wiring? Extension is possible Cheap wiring Unsafe from mechanical damages Installation is easy Hint 67). What is the standard form of SWG? Standard Wire Gauge Sample Wire Gauge Single Wire Gauge Single Wire Galvanometer Hint 68). The number of cores is only two in _________________ cable? Multi-core Single core Coaxial cables Fiber optic cables Hint 69). Which one of the following is a type of distribution system according to the scheme of connection? AC distribution system DC distribution system Ring main system Overhead system Hint 70). What is the standard form of FMC? Flexible Metallic Commutator Flexible Metallic Conductor Flexible Metallic Controller Flexible Metallic Conduit Hint 71). The loose connections, damaged wires or faulty devices are the causes of ___________________ fault type? Over voltage Under voltage Ground Open circuit Hint 72). Which one of the following electrical wiring faults causes physical damage, exposure to heat or chemicals? Loose connection Damaged insulation Over lamping Reverse polarity Hint 73). Which one of the following is a type of wiring made from copper? Aluminum wiring Copper wiring Copper clad aluminum wiring Solid wiring Hint 74). When the conduit size is 1" then the maximum number of wires are ____________________? One Two Four Nine Hint 75). What is the standard form of VIR? Vulcanised Indian Rubber Vulcanised Internal Rubber Vulcanised Integral Rubber Vulcanised Indian Resistor Hint Electrical Wiring MCQ for Quiz 76). When the conduit size is 3" then the maximum number of wires are ____________________? Eighty-four Thirty-one Forty-one Ninety-one Hint 77). What is the standard form of BWG? Birmingham Wire Galvanometer Birmingham Wire Gauge Birmingham Wire Glass Birmingham Wire Gun Hint 78). The thermal conductivity of polystyrene panel is _______________ W/mK? 0,035 0,040 0,025 0,020 Hint 79). When the conduit size is 2" then the maximum number of wires are ____________________? Eighty-four Thirty-one Forty-one Ninety-one Hint 80). What is the standard form of LFMC? Liquid Tight Flexible Metal Commutator Liquid Tight Flexible Metal Conductor Liquid Tight Flexible Metal Conduit Liquid Tight Flexible Metal Controller Hint 81). The voltage range of pressure cables is up to __________________ KV? 11KV 22KV to 66KV 66KV 100KV Hint 82). __________________ are the properties of an insulating materials? High resistivity High dielectric strength Low thermal coefficient All of the above Hint 83). Which one of the following is used in satellite communication? Multi-core Single core Coaxial cables Fiber optic cables Hint 84). What is the standard form of HDCP? High Bandwidth Digital Content High Bandwidth Digital Controller High Bandwidth Digital Commutator High Bandwidth Digital Conduit Hint 85). ___________________ are the estimating and costing of an electrical installation? Price list Overhead charges Labor charges All of the above Hint 86). What is the standard form of MCB? Main Circuit Breaker Main Controller Breaker Main Commutator Breaker Main Circuit Board Hint 87). The rubber has dielectric strength of _______________ KV/mm? 10 KV/mm 20 KV/mm 30 KV/mm 40 KV/mm Hint 88). What is the standard form of CSPE? Chlorosulfonated Polyethylene Chlorosulfonated Polymer Chlorosulfonated Polyester Chlorosulfonated Polye-acrylonitrile Hint 89). The faulty wiring, damaged insulation or faulty devices are the causes of _______________ fault type? Overload Short circuit Open circuit Ground circuit Hint 90). What is the standard form of LFNC? Liquid Tight Flexible Non-metallic Commutator Liquid Tight Flexible Non-metallic Conductor Liquid Tight Flexible Non-metallic Controller Liquid Tight Flexible Non-metallic Conduit Hint 91). The brownouts, faulty equipment, or overloaded circuits are the causes of ___________________ fault type? Over voltage Under voltage Ground Open circuit Hint 92). The damaged insulation, faulty equipment, or poor grounding are the causes of ___________________ fault type? Over voltage Under voltage Ground Open circuit Hint 93). The using of wrong bulb is a cause of ________________ electrical fault? Loose connection Damaged insulation Over lamping Reverse polarity Hint 94). The poor planning, improper installation are the causes of an _______________________ electrical wiring fault? Overcrowded wiring Open ground Reverse polarity Over lamping Hint 95). What is the standard form of RMC? Rigid Metallic Conduit Rigid Metallic Conductor Rigid Metallic Controller Rigid Metallic Commutator Hint 96). What are the advantages of batten wiring? Extension is possible Unsafe from water Unsafe from mechanical damages Life span is short Hint 97). What is the standard form of PTFE? Propylene Tetra Fluoroethylene Polyethylene Tetra Fluoroethylene Polymerization Tetra Fluoroethylene Poly Tetra Fluoroethylene Hint 98). The voltage range of belted cables is up to __________________ KV? 11KV 22KV to 66KV 66KV 100KV Hint 99). Which one of the following is a type of substation according to the constructional features? Power factor correction substation Indoor substation Transformer substation Switching substation Hint 100). What is the standard form of XLPE? Cross Linked Polyethylene Cross Linked Polymer Cross Linked Polymerization Common Linked Polyethylene Hint Time's up
