M6 sub stations

Where does electricity originate before it reaches homes and businesses?

A) Directly from power lines
B) From a power-generating station (power plant)
C) From substations
D) From household electrical panels

• A

• B

• C

• D

What are the three main parts of the power grid?

A) Generation, consumption, transmission
B) Generation, conduction, distribution
C) Generation, transmission, distribution
D) Production, storage, consumption

• A

• B

• C

• D

What is the primary role of a substation in the power grid?

A) To generate electricity for homes and businesses
B) To store excess electricity for future use
C) To connect different parts of the electrical grid
D) To convert electricity into mechanical energy

• A

• B

• C

• D

What is the purpose of switches in substations

A) To generate additional power in case of outages
B) To isolate equipment, transfer load, and control electricity flow
C) To measure voltage fluctuations in power lines
D) To prevent animals from interfering with the electrical grid

• A

• B

• C

• D

Why is switching high-voltage lines more complex than flipping a household light switch?

A) High-voltage lines cannot be turned off
B) Electricity always flows in a closed circuit
C) High voltage can cause arcing, allowing electricity to jump across gaps
D) High-voltage switches require external power sources to operate

• A

• B

• C

• D

What is the function of a circuit breaker in a substation?

A) To store excess energy for emergencies
B) To interrupt current flow in the event of faults
C) To increase voltage before electricity is transmitted
D) To detect humidity levels in transmission lines

• A

• B

• C

• D

How do substations help prevent widespread power failures?

A) By regulating electricity flow and isolating faults
B) By storing backup electricity for peak demand
C) By converting AC to DC for more efficient transmission
D) By generating emergency power when needed

• A

• B

• C

• D

Why is electricity transmitted at high voltage before distribution?

A) To make it more suitable for home appliances
B) To reduce energy losses over long distances
C) To increase resistance in power lines
D) To improve its compatibility with renewable energy sources

• A

• B

• C

• D

How do transformers step voltage up or down?

A) By using magnets to convert electrical energy
B) By changing the number of loops in wire coils
C) By storing electricity and releasing it at different intervals
D) By controlling the frequency of AC electricity

• A

• B

• C

• D