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