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