Which of the following is NOT a renewable energy source?

• Solar energy
• Wind energy
• Natural gas
• Hydropower

Which country is currently a global leader in solar energy production?

• United States
• China
• Germany
• Brazil

Which energy storage system is commonly used to balance electricity supply from renewable sources?

• Coal reserves
• Pumped hydro storage
• Diesel generators
• Nuclear fuel rods

Which renewable energy source has the highest capacity factor (ratio of actual output to potential output)?

• Solar PV
• Onshore wind
• Geothermal
• Biomass

What percentage of global electricity generation comes from renewable sources (as of recent estimates)?

• Less than 5%
• 10-15%
• Around 30%
• Over 60%

What is the primary function of an inverter in a solar power system?

• Store energy for later use
• Convert DC electricity to AC electricity
• Track the sun’s position
• Improve panel efficiency

Which of the following hydropower plant types does NOT require a dam?

• Run-of-river
• Pumped-storage
• Reservoir-based
• Impoundment

Which country produces the largest percentage of its electricity from geothermal sources?

• China
• United States
• Iceland
• Germany

Which biofuel is commonly used as a gasoline additive?

• Ethanol
• Biodiesel
• Methanol
• Propane

What is the main challenge of using hydrogen as an energy storage medium?

• It cannot be produced using renewable energy
• Hydrogen storage and transport are inefficient and expensive
• Hydrogen cannot be converted back to electricity
• Hydrogen production emits more CO₂ than coal