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 15 kV/mm 10 kV/mm 5 kV/mm 30 kV/mm 2 / 20 Cables for 220 kV lines are invariably mica insulated paper insulated compressed oil or compressed gas insulated rubber insulated 3 / 20 The intersheaths in the cables are used to avoid the requirement of good insulation provide proper stress distribution none of the above minimize the stress 4 / 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 5 / 20 The material for armouring on cable is usually steel tape none of the above galvanised steel wire any of the above 6 / 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 7 / 20 In the cables sheaths are used to provide proper insulation none of the above prevent the moisture from entering the cable provide enough strength 8 / 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 9 / 20 The insulation of the cable decreases with the decrease in the length of the insulation none of the above either or the increase in length of the insulation 10 / 20 High tension cables are generally used up to 33kV 66 kV 132 kV 11kV 11 / 20 The electrostatic stress in underground cables is minimum at the conductor and maximum at the sheath zero at the conductor as well as on the sheath maximum at the conductor and minimum at the sheath same at the conductor and the sheath 12 / 20 Is a cable is to be designed for use on 1000 kV which insulation would you prefer ? Impregnated paper Vulcanised rubber Polyvinyle chloride Compressed SF6 gas 13 / 20 PVC stands for pressed and varnished cloth polyvinyl chloride positive voltage conductor post varnish conductor 14 / 20 If the length of a cable is doubled its capacitance remains unchanged becomes double becomes one-fourth becomes one-half 15 / 20 Solid type cables are considered unreliable beyond 66 kV because insulation may melt due to higher temperature skin effect dominates on the conductor of corona loss between conductor and sheath material there is a danger of breakdown of insulation due to the presence of voids 16 / 20 In cables the charging current lags the voltage by 90° leads the voltage by 180° lags the voltage by 180° leads the voltage by 90° 17 / 20 If the insulation is replaced by one of relative permittivity 2 the capacitance of the cable will become double one half none of the above four times 18 / 20 The breakdown of insulation of the cable can be avoided economically by the use of both and insulating materials with different dielectric constants none of the above inter-sheaths 19 / 20 The insulating material should have low permittivity high resistivity all of the above high dielectric strength 20 / 20 Cables generally used beyond 66 kV are oil filled S.L. type armoured belted 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
