Medium
Question 78
Keys: A–E choose an option.
More questions
- Why may dry wood be used as an insulating support in some electrical installations but not treated as a universal high-voltage insulator?
- Which gas is commonly used as an insulating medium in gas-insulated switchgear?
- Why are silicone resins useful in electrical insulation exposed to elevated temperatures?
- Why must asbestos-containing insulating materials be treated as a health hazard during maintenance or removal?
- Which material has traditionally been used as an insulating support in electrical installations?
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