Insulating Oils, Fluids, and Gases

What is the primary function of insulating materials in electrical equipment?

• To conduct electricity

• To prevent the flow of electric current

• To generate electricity

• To dissipate heat

Which of the following is a type of insulating oil derived from petroleum?

• Silicone oil

• Ester oil

• Mineral oil

• Hydrocarbon oil

What is the main advantage of using synthetic oils as insulating materials?

• They are derived from natural sources

• They have specific properties tailored to different applications

• They are always less expensive than mineral oils

• They are not affected by temperature changes

Which gas is widely used in gas-insulated substations due to its excellent dielectric properties?

• Air

• Nitrogen

• Sulfur Hexafluoride (SF6)

• Carbon Dioxide

What is the most common insulating gas used in open-air substations?

• Air

• Nitrogen

• Sulfur Hexafluoride (SF6)

• Carbon Dioxide

_______ esters are a type of insulating fluid derived from plant-based sources.

Silicone oils are known for their high flammability.

• True

• False

The _____ of insulating material depends on the specific requirements of the application.

_________ oils are not suitable for use in high-temperature environments.

Insulating materials are only used in transformers and capacitors.

• True

• False