Alternative Energy Quiz
Questions: 16 · 10 minutes
1. Which energy source draws usable heat from within Earth?
Tidal energy
Biomass energy
Solar thermal energy
Geothermal energy
2. A wind farm uses no fuel while generating, but manufacturing and installing its equipment require materials and energy. What conclusion best follows?
Manufacturing impacts mean wind energy cannot be renewable
Wind power has the same lifecycle effects as every fuel-burning generator
Wind power can have low lifecycle emissions without having zero environmental impact
Only operating impacts should be considered when comparing energy sources
3. Wind turns a turbine's blades, and a generator supplies electricity to the grid. Which conversion best describes this process?
Chemical energy directly into electrical energy
Kinetic energy into mechanical motion and then electrical energy
Thermal energy into nuclear energy and then electricity
Electrical energy into wind and then mechanical motion
4. Which condition best supports classifying harvested wood biomass as renewable over time?
The biomass is replenished through regrowth at a rate compatible with harvesting
The wood produces no carbon dioxide when burned
The fuel is transported only by electric vehicles
The wood is burned at a higher temperature than coal
5. Two wind turbines have the same rated power, but one generates more electricity over a year. What most directly explains the difference?
Its rated power automatically increases each month
It operates with a higher capacity factor because of conditions such as stronger, more consistent wind or less downtime
It converts stored sunlight directly into wind
Its electricity is measured in a different physical unit
6. What does a solar photovoltaic panel directly produce when sunlight reaches its cells?
Electric current
Stored chemical fuel
Geothermal heat
Moving air
7. A grid planner can forecast tidal generation years ahead more precisely than day-to-day wind generation. What mainly makes this possible?
Tides follow predictable gravitational cycles involving Earth, the Moon, and the Sun
Seawater stores electricity between tidal cycles
Tidal generators run at full output continuously
Coastal winds remain constant throughout the year
8. Why can an efficient electric heat pump deliver more heat to a building than the electrical energy it consumes?
It creates extra electricity while operating
It converts indoor carbon dioxide into heat
It burns a hidden reserve of renewable fuel
It uses electricity to move existing heat rather than producing all the heat by resistance
9. After heavy rain, a reservoir behind a hydroelectric dam contains more water at a higher elevation. What form of stored energy has mainly increased?
Chemical potential energy
Nuclear binding energy
Gravitational potential energy
Elastic potential energy
10. Hydrogen must be produced using another energy source before it can be used. What is the most accurate way to describe hydrogen in this context?
A primary renewable resource that exists ready for use in all locations
A form of grid-scale electricity that needs no conversion
A mineral fuel extracted and burned exactly like coal
An energy carrier whose environmental impact depends partly on how it is produced
11. How does a pumped-storage hydropower facility store surplus electricity?
It compresses sunlight inside photovoltaic cells
It pumps water to a higher reservoir and later releases it through turbines
It freezes water so the ice can power a turbine
It converts electricity permanently into hydrogen without further equipment
12. A home relies on rooftop solar panels but needs electricity after sunset. Which addition most directly shifts some daytime solar output to nighttime use?
A solar tracking mount without storage
A larger electricity meter
A battery storage system
Extra roof insulation alone
13. A power plant uses mirrors to concentrate sunlight, heat a working fluid, and run a turbine. Which technology is being described?
Solar photovoltaic generation
Concentrated solar power
Ground-source heat pumping
Run-of-river hydropower
14. How does a solar thermal collector differ from a solar photovoltaic panel?
A solar thermal collector produces wind that turns a generator
A solar thermal collector uses only heat originating inside Earth
A solar thermal collector captures solar energy as heat rather than directly producing electricity in photovoltaic cells
A solar thermal collector can operate only when connected to a battery
15. A household improves insulation and replaces inefficient appliances before sizing a rooftop solar system. What is the main energy benefit of this sequence?
It guarantees the home will never need grid electricity
It converts the solar system into a geothermal system
It makes each solar panel produce electricity throughout the night
Lower demand may allow a smaller system to meet the same share of household needs
16. During a cloudy, windless period, an isolated microgrid needs a generation source that can be dispatched immediately. If stored water is available, which option best fits that need?
Reservoir hydropower with controllable water release
A wind turbine without storage
Unstored rooftop solar generation
A passive solar water heater