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 dielectric strength all of the above high resistivity low permittivity 2 / 20 Is a cable is to be designed for use on 1000 kV which insulation would you prefer ? Vulcanised rubber Compressed SF6 gas Polyvinyle chloride Impregnated paper 3 / 20 In the cables sheaths are used to provide proper insulation provide enough strength prevent the moisture from entering the cable none of the above 4 / 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 5 / 20 The breakdown of insulation of the cable can be avoided economically by the use of insulating materials with different dielectric constants inter-sheaths none of the above both and 6 / 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 15 kV/mm 5 kV/mm 10 kV/mm 7 / 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 8 / 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 9 / 20 If the insulation is replaced by one of relative permittivity 2 the capacitance of the cable will become none of the above double one half four times 10 / 20 PVC stands for post varnish conductor polyvinyl chloride positive voltage conductor pressed and varnished cloth 11 / 20 The material for armouring on cable is usually none of the above any of the above steel tape galvanised steel wire 12 / 20 High tension cables are generally used up to 132 kV 66 kV 11kV 33kV 13 / 20 If a power cable and a communication cable are to run parallel the minimum distance between the two to avoid interference should be 400 cm 10 cm 2 cm 50 cm 14 / 20 The intersheaths in the cables are used to provide proper stress distribution minimize the stress none of the above avoid the requirement of good insulation 15 / 20 In cables the charging current leads the voltage by 90° lags the voltage by 180° lags the voltage by 90° leads the voltage by 180° 16 / 20 If the length of a cable is doubled its capacitance becomes double remains unchanged becomes one-half becomes one-fourth 17 / 20 Cables generally used beyond 66 kV are S.L. type armoured belted oil filled 18 / 20 Cables for 220 kV lines are invariably rubber insulated compressed oil or compressed gas insulated mica insulated paper insulated 19 / 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 20 / 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 SFe gas 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
