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 pressed and varnished cloth post varnish conductor positive voltage conductor polyvinyl chloride 2 / 20 Is a cable is to be designed for use on 1000 kV which insulation would you prefer ? Impregnated paper Polyvinyle chloride Vulcanised rubber Compressed SFe gas 3 / 20 The insulation of the cable decreases with either or the increase in length of the insulation none of the above the decrease in the length of the insulation 4 / 20 High tension cables are generally used up to 33kV 66 kV 11kV 132 kV 5 / 20 If the insulation is replaced by one of relative permittivity 2 the capacitance of the cable will become none of the above double four times one half 6 / 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 7 / 20 Solid type cables are considered unreliable beyond 66 kV because there is a danger of breakdown of insulation due to the presence of voids skin effect dominates on the conductor of corona loss between conductor and sheath material insulation may melt due to higher temperature 8 / 20 The intersheaths in the cables are used to minimize the stress none of the above avoid the requirement of good insulation provide proper stress distribution 9 / 20 The breakdown of insulation of the cable can be avoided economically by the use of inter-sheaths insulating materials with different dielectric constants none of the above both and 10 / 20 If the length of a cable is doubled its capacitance becomes one-fourth becomes double becomes one-half remains unchanged 11 / 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 12 / 20 In cables the charging current lags the voltage by 90° lags the voltage by 180° leads the voltage by 90° leads the voltage by 180° 13 / 20 Cables for 220 kV lines are invariably mica insulated rubber insulated compressed oil or compressed gas insulated paper insulated 14 / 20 The material for armouring on cable is usually any of the above none of the above steel tape galvanised steel wire 15 / 20 Cables generally used beyond 66 kV are armoured S.L. type oil filled belted 16 / 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 same at the conductor and the sheath maximum at the conductor and minimum at the sheath 17 / 20 The insulating material should have high resistivity high dielectric strength low permittivity all 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 50 cm 2 cm 400 cm 10 cm 19 / 20 Is a cable is to be designed for use on 1000 kV which insulation would you prefer ? Compressed SF6 gas Polyvinyle chloride Impregnated paper Vulcanised rubber 20 / 20 In the cables sheaths are used to prevent the moisture from entering the cable provide proper insulation provide enough strength none of the above 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
