Understanding Fossil Fuels and Energy Conversion

What are fossil fuels primarily made from?

• Minerals and rocks

• Decaying organic matter

• Synthetic chemicals

• Metal ores

Why are fossil fuels considered non-renewable?

• They are abundant and easily accessible

• They cannot be replenished once used

• They are formed from renewable resources

• They can be easily replenished

What is the primary process in a fossil fuel power plant to generate electricity?

• Utilizing nuclear reactions

• Harnessing wind energy

• Burning fossil fuels to create steam

• Using solar panels

What is energy density?

• Energy released during combustion

• Energy stored per unit of volume

• Energy required to start a reaction

• Energy stored per unit of mass

How much energy does a cubic meter of oil contain?

• 45 megajoules

• 10,000 megajoules

• 27 megajoules

• 40,500 megajoules

What is the specific energy of oil?

• 27 megajoules per kilogram

• 45 megajoules per kilogram

• 40,500 megajoules per kilogram

• 10,000 megajoules per kilogram

In the first example problem, how many barrels of oil are needed to generate 20 megawatts for eight hours?

• 150 barrels

• 297 barrels

• 100 barrels

• 500 barrels

What is the efficiency of the coal plant in the second example problem?

• 40%

• 28%

• 50%

• 30%

How much power does the coal plant generate in the second example problem?

• 0.175 megawatts

• 2 megawatts

• 1 megawatt

• 0.5 megawatts

What is the relationship between energy density and specific energy?

• Energy density is unrelated to specific energy

• Specific energy is volume divided by mass

• Energy density divided by specific energy equals density

• Energy density is mass divided by volume