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 the length of a cable is doubled its capacitance remains unchanged becomes one-fourth becomes one-half becomes double 2 / 20 The intersheaths in the cables are used to none of the above provide proper stress distribution avoid the requirement of good insulation minimize the stress 3 / 20 PVC stands for polyvinyl chloride pressed and varnished cloth post varnish conductor positive voltage conductor 4 / 20 Is a cable is to be designed for use on 1000 kV which insulation would you prefer ? Polyvinyle chloride Compressed SF6 gas Impregnated paper Vulcanised rubber 5 / 20 In cables the charging current leads the voltage by 90° leads the voltage by 180° lags the voltage by 180° lags the voltage by 90° 6 / 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 10 kV/mm 30 kV/mm 5 kV/mm 7 / 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 8 / 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 9 / 20 In the cables sheaths are used to provide proper insulation prevent the moisture from entering the cable provide enough strength none of the above 10 / 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 50 cm 10 cm 400 cm 11 / 20 The material for armouring on cable is usually none of the above any of the above steel tape galvanised steel wire 12 / 20 Cables for 220 kV lines are invariably paper insulated compressed oil or compressed gas insulated mica insulated rubber insulated 13 / 20 Cables generally used beyond 66 kV are belted oil filled S.L. type armoured 14 / 20 The advantage of oil filled cables is smaller overall size more perfect impregnation all of the above no ionisation oxidation and formation of voids 15 / 20 The electrostatic stress in underground cables is maximum at the conductor and minimum at the sheath minimum at the conductor and maximum at the sheath zero at the conductor as well as on the sheath same at the conductor and the sheath 16 / 20 Is a cable is to be designed for use on 1000 kV which insulation would you prefer ? Compressed SFe gas Polyvinyle chloride Vulcanised rubber Impregnated paper 17 / 20 Solid type cables are considered unreliable beyond 66 kV because of corona loss between conductor and sheath material skin effect dominates on the conductor insulation may melt due to higher temperature there is a danger of breakdown of insulation due to the presence of voids 18 / 20 High tension cables are generally used up to 33kV 132 kV 66 kV 11kV 19 / 20 The insulating material should have all of the above high dielectric strength high resistivity low permittivity 20 / 20 If the insulation is replaced by one of relative permittivity 2 the capacitance of the cable will become four times one half none of the above double 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
