Global Sustainability Exam 2

Disadvantage of solar power?

Efficiency of solar cells is about 10%-20%.

Which of the following scientists invented the first solar-powered steam engine?

Auguste Mouchout

The manufacture of solar cells produces highly toxic waste metals and solvents that require special technology for disposal.

True

Hydrogen can be stored as which of the following?

Gas, compressed gas, liquid, and metal hydride

The operating temperature of the proton exchange membrane fuel cell is which of the following?

60 to 100 degrees celcius

Liquid lithium is used as an electrolyte in which of the following fuel cells?

Molten carbonate fuel cell

Winds are neither local nor regional.

False

Wind power generating capacity is still under the 30,000 MW (mega watts) mark.

The reliability of modern wind turbines is about

Silicon’s atomic number

14

Sugar (C6H12O6)+Yeast= Alcohol (C2H5OH)

Fermentation

Algae

Is the best form for biomass fuels

The earth’s atmosphere is a reservior of …

Solar radiation

Wind is continuously regenerated in the atmosphere as?

solar radiation id converted into kinetic energy