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 electrostatic stress in underground cables is maximum at the conductor and minimum at the sheath zero at the conductor as well as on the sheath same at the conductor and the sheath minimum at the conductor and maximum at the sheath 2 / 20 The advantage of oil filled cables is smaller overall size all of the above more perfect impregnation no ionisation oxidation and formation of voids 3 / 20 If the insulation is replaced by one of relative permittivity 2 the capacitance of the cable will become four times one half none of the above double 4 / 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 5 / 20 Solid type cables are considered unreliable beyond 66 kV because skin effect dominates on the conductor insulation may melt due to higher temperature of corona loss between conductor and sheath material there is a danger of breakdown of insulation due to the presence of voids 6 / 20 The breakdown of insulation of the cable can be avoided economically by the use of both and insulating materials with different dielectric constants inter-sheaths none of the above 7 / 20 If the length of a cable is doubled its capacitance becomes double becomes one-fourth becomes one-half remains unchanged 8 / 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 30 kV/mm 5 kV/mm 10 kV/mm 9 / 20 Is a cable is to be designed for use on 1000 kV which insulation would you prefer ? Vulcanised rubber Impregnated paper Polyvinyle chloride Compressed SF6 gas 10 / 20 High tension cables are generally used up to 33kV 66 kV 132 kV 11kV 11 / 20 Cables for 220 kV lines are invariably compressed oil or compressed gas insulated mica insulated paper insulated rubber insulated 12 / 20 Is a cable is to be designed for use on 1000 kV which insulation would you prefer ? Polyvinyle chloride Vulcanised rubber Impregnated paper Compressed SFe gas 13 / 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 14 / 20 The insulation of the cable decreases with the increase in length of the insulation none of the above the decrease in the length of the insulation either or 15 / 20 In cables the charging current leads the voltage by 180° leads the voltage by 90° lags the voltage by 180° lags the voltage by 90° 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 10 cm 50 cm 400 cm 17 / 20 The material for armouring on cable is usually any of the above none of the above steel tape galvanised steel wire 18 / 20 The insulating material should have high resistivity all of the above high dielectric strength low permittivity 19 / 20 PVC stands for positive voltage conductor polyvinyl chloride post varnish conductor pressed and varnished cloth 20 / 20 Cables generally used beyond 66 kV are S.L. type armoured belted oil filled 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
