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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?

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2). What are the advantages of cleat wiring?

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3). In which one of the following wiring, the repair is difficult?

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4). The mineral insulated copper covered wire used in __________________?

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5). What is the standard form of EPR?

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6). The number of cores is one in _________________ cable?

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7). Which one of the following is a type of distribution system according to the type of construction?


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8). In which one of the following substations the space required is more?

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9). Which one of the following is a type of substation according to the service requirement?

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10). What is the standard form of RNMC?

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11). The voltage range of screened cables is up to __________________ KV?

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12). The relative permittivity of a rubber is varying between ___________________?

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13). The cross-linked poly ethene cables are suitable up to voltages of ___________________?

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14). Which one of the following cables is designed by H. Hochstadter?

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15). What is the standard form of IMC?

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16). How many types of oil filled cables are there?

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17). What is the standard form of GIC?

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18). The current measurement is a detection in _____________________ electrical fault?

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19). The visual inspection is a detection in ___________________ type of an electrical fault?

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20). What is the standard form of ENT?

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21). The lightning strikes, power surges, or faulty equipment are the causes of ___________________ fault type?

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22). Which one of the following electrical wiring faults causes improper installation, aging, or damaged wires?

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23). If the wire Guage is ten, then the diameter is ____________________ mm?

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24). Which one of the following types of wiring is less expensive and poor in corrosion resistance?

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25). What is the standard form of RPVC?

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Electrical Wiring MCQ for Exams

26). Which one of the following types of wiring is suitable for low to medium voltage applications?

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27). When the conduit size is ½" then the maximum number of wires are ____________________?

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28). What is the standard form of MWG?

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29). The voltage rating varies by insulation type in ________________ wiring?

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30). What is the standard form of EMT?

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31). The conductivity of an aluminium wiring is _________________siemens/meter?

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32). The resistance of copper wiring is _________________ ohms/kilometre?

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33). Which one of the following electrical wirings is less flexible than stranded wire?

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34). The resistance of copper clad aluminium wiring is ___________________ ohms/kilometre?

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35). What is the standard form of TRS?

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36). When the conduit size is 3/4" then the maximum number of wires are ____________________?

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37). What is the standard form of SWG?

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38). Which one of the following wirings typically used in metric sizes?

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39). The ampacity varies by gauge and insulation type in _______________ wiring?

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40). What is the standard form of GRC?

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41). Which one of the following is a type of wiring made from aluminium?

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42). What is the standard form of CCA?

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43). The copper wiring conductivity is ________________ siemens/meter?

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44). The conductivity of copper clad aluminum wiring is __________________ siemens/meter?

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45). What is the standard form of CTS?

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46). The insulation resistivity of rubber is 10 exp _______________?

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47). The cross-linked poly ethene cables has temperature range beyond ___________________?

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48). The time required for erection is more in ____________________ substation?

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49). What is the standard form of SBR?

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50). Which one of the following is a type of metallic tubing?

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Electrical Wiring MCQ for Interviews

51). What is the standard form of ICDP?

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52). What are the disadvantages of cleat wiring?

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53). Which one of the following types of wiring life span is short?

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54). What is the standard form of MICC?

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55). Which one of the following is a low gauge conduit?

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56). ___________________ are the general requirements of an electrical installation?

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57). What is the standard form of AWG?

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58). Which one of the following types of wiring cost is low?

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59). In which one of the following types of wiring the installation is very easy?

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60). Which one of the following is a type of non-metallic conduit?

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61). What is the standard form of ICTP?

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62). The number of cores is two or more in _________________ cable?

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63). Which one of the following is a type of distribution system according to the nature of current?

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64). What is the standard form of TMDS?

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65). Which one of the following is a high gauge conduit?

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66). What are the disadvantages of batten wiring?

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67). What is the standard form of SWG?

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68). The number of cores is only two in _________________ cable?

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69). Which one of the following is a type of distribution system according to the scheme of connection?

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70). What is the standard form of FMC?

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71). The loose connections, damaged wires or faulty devices are the causes of ___________________ fault type?

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72). Which one of the following electrical wiring faults causes physical damage, exposure to heat or chemicals?

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73). Which one of the following is a type of wiring made from copper?

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74). When the conduit size is 1" then the maximum number of wires are ____________________?

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75). What is the standard form of VIR?

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Electrical Wiring MCQ for Quiz

76). When the conduit size is 3" then the maximum number of wires are ____________________?

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77). What is the standard form of BWG?

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78). The thermal conductivity of polystyrene panel is _______________ W/mK?

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79). When the conduit size is 2" then the maximum number of wires are ____________________?

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80). What is the standard form of LFMC?

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81). The voltage range of pressure cables is up to __________________ KV?

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82). __________________ are the properties of an insulating materials?

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83). Which one of the following is used in satellite communication?

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84). What is the standard form of HDCP?

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85). ___________________ are the estimating and costing of an electrical installation?

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86). What is the standard form of MCB?

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87). The rubber has dielectric strength of _______________ KV/mm?

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88). What is the standard form of CSPE?

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89). The faulty wiring, damaged insulation or faulty devices are the causes of _______________ fault type?

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90). What is the standard form of LFNC?

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91). The brownouts, faulty equipment, or overloaded circuits are the causes of ___________________ fault type?

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92). The damaged insulation, faulty equipment, or poor grounding are the causes of ___________________ fault type?

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93). The using of wrong bulb is a cause of ________________ electrical fault?

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94). The poor planning, improper installation are the causes of an _______________________ electrical wiring fault?

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95). What is the standard form of RMC?

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96). What are the advantages of batten wiring?

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97). What is the standard form of PTFE?

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98). The voltage range of belted cables is up to __________________ KV?

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99). Which one of the following is a type of substation according to the constructional features?

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100). What is the standard form of XLPE?

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