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