General Earthing Quiz

What is not normally carried by the components covered by general earthing?

• Voltage

• Current

• Resistance

• Power

What should be done with the operating handles of isolators in a substation?

• Use an auxiliary earth mat underneath if necessary

• Connect directly to the main power line

• Insulate from the ground

• Paint with non-conductive paint

What should be done with peripheral fencing in a substation?

• It should be earthed

• It should be insulated

• It should be painted

• It should be connected to the main power line

What is the resistance requirement for a distribution transformer?

• 2 Ohms

• 1 Ohm

• 0.5 Ohms

• 5 Ohms

In a "Directly or Solidly Grounded" system, what is the role of the ground?

• To act as a reference point for voltage

• To increase circuit impedance

• To decrease circuit resistance

• To provide electrical insulation

What are neutral grounding resistors (NGRs) also known as?

• Neutral earthing resistors (NERs)

• Neutral grounding transformers (NGTs)

• Neutral earthing transformers (NETs)

• Neutral grounding capacitors (NGCs)

When are isolator switches used?

• During high-load conditions

• In no-load conditions

• To break fault currents

• To increase current flow

What is the visible break in a circuit used for?

• To conduct electricity

• To isolate a section of the circuit

• To increase current

• To decrease voltage

What is the purpose of an isolator in a high-voltage system?

• To increase current

• To isolate sections safely

• To conduct electricity

• To decrease voltage

What is the main use of isolator switches?

• To conduct electricity

• To open circuits in no-load conditions

• To increase voltage

• To decrease current