What are the required skills for electrical testing?

It is important to know and understand the purpose of the method of testing to be done. In Addition, be knowlegeable of the testing materials and equipments to be used and especially the safety precautions.

Primarily, you should have the extensive understanding of electrical schematics and theory.
Plus an excellent logical ability to connect all the "dots"...
There is a saying, you could be an exceptional engineer but you cannot be a teacher or the other way around...
but if you manage to cross that boundary, then you uncontested....

education , skills , training , intellegence , fast response

نعم الخبرة مهمة و ضرورية جدا لانها تعد امور خطيرة لمن لا يستطيع القيام بهذه الاعمال