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 High tension cables are generally used up to 33kV 11kV 132 kV 66 kV 2 / 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 3 / 20 The material for armouring on cable is usually steel tape none of the above any of the above galvanised steel wire 4 / 20 The insulating material should have all of the above high resistivity high dielectric strength low permittivity 5 / 20 The insulation of the cable decreases with either or none of the above the decrease in the length of the insulation the increase in length of the insulation 6 / 20 Is a cable is to be designed for use on 1000 kV which insulation would you prefer ? Impregnated paper Vulcanised rubber Compressed SFe gas Polyvinyle chloride 7 / 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 8 / 20 Cables for 220 kV lines are invariably paper insulated mica insulated compressed oil or compressed gas insulated rubber insulated 9 / 20 PVC stands for pressed and varnished cloth polyvinyl chloride positive voltage conductor post varnish conductor 10 / 20 Cables generally used beyond 66 kV are oil filled S.L. type belted armoured 11 / 20 If the length of a cable is doubled its capacitance becomes one-half remains unchanged becomes double becomes one-fourth 12 / 20 The advantage of oil filled cables is more perfect impregnation all of the above no ionisation oxidation and formation of voids smaller overall size 13 / 20 Solid type cables are considered unreliable beyond 66 kV because skin effect dominates on the conductor of corona loss between conductor and sheath material insulation may melt due to higher temperature there is a danger of breakdown of insulation due to the presence of voids 14 / 20 In the cables sheaths are used to provide proper insulation none of the above provide enough strength prevent the moisture from entering the cable 15 / 20 If the insulation is replaced by one of relative permittivity 2 the capacitance of the cable will become four times double one half none of the above 16 / 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 10 kV/mm 5 kV/mm 17 / 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 18 / 20 The intersheaths in the cables are used to none of the above avoid the requirement of good insulation minimize the stress provide proper stress distribution 19 / 20 In cables the charging current leads the voltage by 90° lags the voltage by 90° leads the voltage by 180° lags the voltage by 180° 20 / 20 The breakdown of insulation of the cable can be avoided economically by the use of both and none of the above insulating materials with different dielectric constants inter-sheaths 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
