WHAT_IS_THE_MOST_COMMON_CAUSE_OF_FAILURE_OF_OVERHEAD_LINE_INSULATORS?? – McqOptions

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1.	WHAT_IS_THE_MOST_COMMON_CAUSE_OF_FAILURE_OF_OVERHEAD_LINE_INSULATORS??$
A.	Flashover
B.	Mechanical stress
C.	Porosity of materials
D.	Improper vitrification
Answer» B. Mechanical stress

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