Electrical ppt 2

Which component in the diagram is responsible for increasing the voltage?

• Generator

• Turbine

• Step Up Transformer

• Power Station

What is the purpose of transmitting electricity at very high voltages?

• To increase power loss

• To reduce power loss

• To make electricity cheaper

• To make electricity safer

What is the purpose of the extraneous metallic pipework in the TN-C-S system?

• To provide water supply

• To act as a heat exchanger

• To connect central heating systems

• To support the structure

What does TN-C-S stand for in electrical systems?

• Terra Neutral Combined Separate

• Terra Neutral Combined System

• Terra Neutral Common System

• Terra Neutral Circuit System

What is the primary material used for the cold water supply pipework in the TN-C-S system?

• Steel

• Copper

• Plastic

• Aluminum

What does a TT earthing arrangement require?

• A metal plate

• An earth rod

• A plastic pipe

• A wooden stake

What type of coil is used as the secondary coil in a substation transformer for three-phase supplies?

• Delta

• Star

• Circular

• Square

Three-phase supplies are not normally associated with which type of buildings?

• Industrial buildings

• Commercial buildings

• Dwellings

• Factories

What is the potential difference between any two phases in a three-phase supply?

• 230V

• 400V

• 11kV

• 600V

Which phase is used for both three-phase and neutral load?

• Brown phase

• Black phase

• Grey phase

• Blue phase