Due to which of the following reasons the cables should not be operated too hot?
AThe thermal instability may rise due to the rapid increase of dielectric losses with temperature
BUnequal expansion may create voids in the insulation which will lead to ionization
CAll of the above
DExpansion of the oil may cause the sheath to burst
EThe oil may loose its viscosity and it may start drawing off from higher levels
Correct answer
C. All of the above
Explanation
The correct answer is All of the above.