ELECTRICAL SUPPLY SYSTEM

1. What is the main purpose of a turbine in electricity generation?

• To store electricity

• To convert mechanical energy to chemical energy

• To cool down steam

• To convert kinetic energy into mechanical energy

2. What percentage of worldwide electricity was generated by fossil fuels in 2017?

• 51.2%

• 72.8%

• 64.5%

• 47.9%

3. Which energy source uses uranium fuel to produce electricity?

• Biomass

• Solar

• Nuclear

• Wind

4. In a thermal power plant, which of the following is commonly used as fuel?

• Coal

• Wind

• Water

• Sunlight

5. What is the function of a transformer in an electrical system?

• To generate electricity

• To step up or step down voltage

• To transmit electricity wirelessly

• To cool the generator

6. What is hydroelectric power primarily generated from?

• Flowing or falling water

• Burning coal

• Sunlight

• Nuclear fusion

7. What are the two basic types of hydroelectric systems?

• Closed loop and steam based

• Reservoir based and run of river

• Solar hydro and wind hydro

• Passive and active

8. What energy does geothermal power utilize?

• Energy from tides

• Heat from beneath the Earth

• Energy from fire

• Heat from the sun

9. What is the main component in solar photovoltaic cells?

• Glass

• Plastic

• Copper

• Semiconductor material

10. What kind of energy conversion happens in wind turbines?

• Chemical to thermal

• Thermal to nuclear

• Kinetic to electrical

• Potential to chemical