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