41. The use of strain type insulators is made where the conductors are
42. As compared to a 2-wire D.C. distributor, a 3-wire distributor with same maximum voltage to earth uses only
43. A circuit is disconnected by isolators when
44. Large industrial consumers are supplied electrical energy at
45. In a substation the following equipment is not installed
46. The distributors for residential areas are
47. The material commonly used for insulation in high voltage cables is
48. The material generally used for armour of high voltage cables is
49. Which of the following bus-bar schemes has the lowest cost?
50. Corona usually occurs when the electrostatic stress in air around the conductor exceeds
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