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