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 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 2 / 20 PVC stands for positive voltage conductor pressed and varnished cloth post varnish conductor polyvinyl chloride 3 / 20 If the insulation is replaced by one of relative permittivity 2 the capacitance of the cable will become double none of the above one half four times 4 / 20 The electrostatic stress in underground cables is maximum at the conductor and minimum at the sheath same at the conductor and the sheath zero at the conductor as well as on the sheath minimum at the conductor and maximum at the sheath 5 / 20 The insulating material should have all of the above high dielectric strength high resistivity low permittivity 6 / 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 7 / 20 In the cables sheaths are used to prevent the moisture from entering the cable provide enough strength provide proper insulation none of the above 8 / 20 Cables generally used beyond 66 kV are oil filled S.L. type belted armoured 9 / 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 400 cm 10 cm 50 cm 10 / 20 High tension cables are generally used up to 11kV 132 kV 33kV 66 kV 11 / 20 The intersheaths in the cables are used to none of the above provide proper stress distribution minimize the stress avoid the requirement of good insulation 12 / 20 Is a cable is to be designed for use on 1000 kV which insulation would you prefer ? Impregnated paper Polyvinyle chloride Compressed SF6 gas Vulcanised rubber 13 / 20 The advantage of oil filled cables is no ionisation oxidation and formation of voids more perfect impregnation all of the above smaller overall size 14 / 20 In cables the charging current lags the voltage by 180° leads the voltage by 90° lags the voltage by 90° leads the voltage by 180° 15 / 20 If a cable of homogeneous insulation has a maximum stress of 10 kV/mm then the dielectric strength of insulation should be 5 kV/mm 30 kV/mm 10 kV/mm 15 kV/mm 16 / 20 Cables for 220 kV lines are invariably rubber insulated compressed oil or compressed gas insulated mica insulated paper insulated 17 / 20 If the length of a cable is doubled its capacitance remains unchanged becomes double becomes one-fourth becomes one-half 18 / 20 Solid type cables are considered unreliable beyond 66 kV because insulation may melt due to higher temperature of corona loss between conductor and sheath material skin effect dominates on the conductor there is a danger of breakdown of insulation due to the presence of voids 19 / 20 Is a cable is to be designed for use on 1000 kV which insulation would you prefer ? Compressed SFe gas Vulcanised rubber Polyvinyle chloride Impregnated paper 20 / 20 The material for armouring on cable is usually none of the above any of the above galvanised steel wire steel tape 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
