Electrical Green and Renewable Technology

This is ..

• a horizontal axis wind turbine

• a big fan

• a vertical axis wind turbine

• an egg beater

Tags

NGSS.MS-ETS1-1

This is ..

• a horizontal axis wind turbine

• a big fan

• a vertical axis wind turbine

• an egg beater

A 350 MW biomass power station has an overall efficiency of 26% and is fed by bagasse, with an average calorific value of 18.3 MJ/kg. The power plant runs at its rated capacity for 3 hours. Determine the total amount of electricity produced (in MWh) during this period.

• 10.5 MWh

• 1050 MWh

• 105 MWh

• 1.05 MWh

Tags

NGSS.HS-PS3-1

A biomass power station has 40,000 tonnes of wood pellets in its storage silos. This storage capacity needs to be replenished when the capacity is down to 25%. The electrical efficiency of the facility is 24%. Assuming the wood pellets have a calorific value of 19.5 MJ/kg, calculate the total amount of electrical energy (in GWh) that the plant can produce, before requiring their silos to be refilled.

• 49 GWh

• 19 GWh

• 39 GWh

• 29 GWh

Tags

NGSS.MS-PS3-4

Which of the following is a primary advantage of using solar panels in renewable energy systems?

• Low initial cost

• High energy density

• Zero emissions during operation

• 24/7 energy production

What is the main component of a wind turbine that converts kinetic energy into electrical energy?

• Rotor blades

• Gearbox

• Generator

• Nacelle

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

In a hydroelectric power plant, what is the role of the dam?

• To store electrical energy

• To increase water flow speed

• To convert water energy into mechanical energy

• To store potential energy in water

Tags

NGSS.MS-PS3-2

Which of the following is a common method for storing energy generated by renewable sources?

• Capacitors

• Lithium-ion batteries

• Superconductors

• Fuel cells

Tags

NGSS.MS-ESS3-3

What is the primary environmental benefit of using wind energy?

• Reduction in water usage

• Decrease in air pollution

• Increase in land use

• Reduction in noise pollution

Which of the following technologies is used to improve the efficiency of solar panels?

• Reflective coatings

• Wind turbines

• Hydroelectric dams

• Geothermal pumps

Tags

NGSS.HS-ETS1-3

NGSS.HS-PS3-3