By Surendra | June 11, 2020 0 Comment 0% 2 Created by Surendra Electrician Cables Quiz in English Set 1 All Important Question Answers for Electrician Related Exams 1 / 20 If a cable of homogeneous insulation has a maximum stress of 10 kV/mm then the dielectric strength of insulation should be 5 kV/mm 15 kV/mm 10 kV/mm 30 kV/mm 2 / 20 In cables the charging current leads the voltage by 90° lags the voltage by 90° lags the voltage by 180° leads the voltage by 180° 3 / 20 PVC stands for pressed and varnished cloth polyvinyl chloride positive voltage conductor post varnish conductor 4 / 20 Cables generally used beyond 66 kV are armoured belted oil filled S.L. type 5 / 20 The insulating material should have high resistivity high dielectric strength all of the above low permittivity 6 / 20 The electrostatic stress in underground cables is zero at the conductor as well as on the sheath maximum at the conductor and minimum at the sheath minimum at the conductor and maximum at the sheath same at the conductor and the sheath 7 / 20 If the insulation is replaced by one of relative permittivity 2 the capacitance of the cable will become one half double none of the above four times 8 / 20 Cables for 220 kV lines are invariably rubber insulated compressed oil or compressed gas insulated paper insulated mica insulated 9 / 20 The intersheaths in the cables are used to minimize the stress provide proper stress distribution avoid the requirement of good insulation none of the above 10 / 20 The insulation of the cable decreases with either or the increase in length of the insulation the decrease in the length of the insulation none of the above 11 / 20 If the length of a cable is doubled its capacitance becomes one-fourth remains unchanged becomes one-half becomes double 12 / 20 Is a cable is to be designed for use on 1000 kV which insulation would you prefer ? Impregnated paper Polyvinyle chloride Compressed SFe gas Vulcanised rubber 13 / 20 In the cables sheaths are used to provide enough strength none of the above prevent the moisture from entering the cable provide proper insulation 14 / 20 High tension cables are generally used up to 33kV 11kV 132 kV 66 kV 15 / 20 Solid type cables are considered unreliable beyond 66 kV because of corona loss between conductor and sheath material there is a danger of breakdown of insulation due to the presence of voids skin effect dominates on the conductor insulation may melt due to higher temperature 16 / 20 The breakdown of insulation of the cable can be avoided economically by the use of both and none of the above inter-sheaths insulating materials with different dielectric constants 17 / 20 The material for armouring on cable is usually galvanised steel wire any of the above steel tape none of the above 18 / 20 If a power cable and a communication cable are to run parallel the minimum distance between the two to avoid interference should be 2 cm 400 cm 10 cm 50 cm 19 / 20 The advantage of oil filled cables is smaller overall size no ionisation oxidation and formation of voids more perfect impregnation all of the above 20 / 20 Is a cable is to be designed for use on 1000 kV which insulation would you prefer ? Vulcanised rubber Impregnated paper Compressed SF6 gas Polyvinyle chloride कृपया सही सूचना भरें ताकि सर्टिफिकेट ईमेल पर भेजा जा सकें। NameEmailPhone NumberDistrictSchool/Coaching Name Your score is LinkedIn Facebook Twitter VKontakte 0% Restart quiz आपको यह क्विज अच्छी लगी तो 5 स्टार रेटिंग जरुर दें । Send feedback