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