Electrical Engineering Mcqs

Due to which of the following reasons the cables should not be operated too hot ?
  • (A)  The oil may loose its viscosity and it may start drawing off from higher levels
  • (B)  Expansion of the oil may cause the sheath to burst
  • (C)  Unequal expansion may create voids in the insulation which will lead to ionization
  • (D)  The thermal instability may rise due to the rapid increase of dielectric losses with temperature
  • (E)  All of the above