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 post varnish conductor pressed and varnished cloth polyvinyl chloride positive voltage conductor 2 / 20 The intersheaths in the cables are used to provide proper stress distribution minimize the stress avoid the requirement of good insulation none of the above 3 / 20 The breakdown of insulation of the cable can be avoided economically by the use of none of the above inter-sheaths insulating materials with different dielectric constants both and 4 / 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° 5 / 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 400 cm 2 cm 10 cm 6 / 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 7 / 20 The material for armouring on cable is usually any of the above steel tape none of the above galvanised steel wire 8 / 20 In the cables sheaths are used to provide enough strength none of the above provide proper insulation prevent the moisture from entering the cable 9 / 20 If the insulation is replaced by one of relative permittivity 2 the capacitance of the cable will become four times none of the above one half double 10 / 20 The insulation of the cable decreases with the decrease in the length of the insulation the increase in length of the insulation none of the above either or 11 / 20 The electrostatic stress in underground cables is zero at the conductor as well as on the sheath minimum at the conductor and maximum at the sheath maximum at the conductor and minimum at the sheath same at the conductor and the sheath 12 / 20 Cables for 220 kV lines are invariably compressed oil or compressed gas insulated rubber insulated paper insulated mica 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 15 kV/mm 5 kV/mm 30 kV/mm 10 kV/mm 14 / 20 If the length of a cable is doubled its capacitance becomes double becomes one-fourth remains unchanged becomes one-half 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 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 17 / 20 Is a cable is to be designed for use on 1000 kV which insulation would you prefer ? Vulcanised rubber Polyvinyle chloride Impregnated paper Compressed SF6 gas 18 / 20 High tension cables are generally used up to 33kV 132 kV 66 kV 11kV 19 / 20 Cables generally used beyond 66 kV are belted oil filled armoured S.L. type 20 / 20 The insulating material should have high resistivity high dielectric strength low permittivity all 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
