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 intersheaths in the cables are used to minimize the stress provide proper stress distribution none of the above avoid the requirement of good insulation 2 / 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 3 / 20 In cables the charging current lags the voltage by 90° leads the voltage by 180° lags the voltage by 180° leads the voltage by 90° 4 / 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 insulation may melt due to higher temperature skin effect dominates on the conductor of corona loss between conductor and sheath material 5 / 20 The insulating material should have high resistivity low permittivity high dielectric strength all of the above 6 / 20 Cables generally used beyond 66 kV are armoured belted S.L. type oil filled 7 / 20 The advantage of oil filled cables is all of the above no ionisation oxidation and formation of voids smaller overall size more perfect impregnation 8 / 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 9 / 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 15 kV/mm 10 kV/mm 30 kV/mm 10 / 20 Is a cable is to be designed for use on 1000 kV which insulation would you prefer ? Vulcanised rubber Impregnated paper Compressed SF6 gas Polyvinyle chloride 11 / 20 PVC stands for polyvinyl chloride positive voltage conductor post varnish conductor pressed and varnished cloth 12 / 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 10 cm 400 cm 2 cm 13 / 20 High tension cables are generally used up to 132 kV 66 kV 11kV 33kV 14 / 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 15 / 20 The breakdown of insulation of the cable can be avoided economically by the use of insulating materials with different dielectric constants both and none of the above inter-sheaths 16 / 20 The insulation of the cable decreases with the decrease in the length of the insulation either or the increase in length of the insulation none of the above 17 / 20 The material for armouring on cable is usually any of the above galvanised steel wire none of the above steel tape 18 / 20 If the length of a cable is doubled its capacitance becomes double becomes one-fourth remains unchanged becomes one-half 19 / 20 Cables for 220 kV lines are invariably compressed oil or compressed gas insulated mica insulated rubber insulated paper insulated 20 / 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 minimum at the conductor and maximum at the sheath same at the conductor and the sheath कृपया सही सूचना भरें ताकि सर्टिफिकेट ईमेल पर भेजा जा सकें। NameEmailPhone NumberDistrictSchool/Coaching Name Your score is LinkedIn Facebook Twitter VKontakte 0% Restart quiz आपको यह क्विज अच्छी लगी तो 5 स्टार रेटिंग जरुर दें । Send feedback
