Question 1

Which of the following is a way to improve a vehicle's energy efficiency?

Accepted Answer

All of these options are ways to improve a vehicle's energy efficiency. Using lighter materials reduces the vehicle's weight and energy needed to move it. More aerodynamic shapes reduce drag and increase fuel efficiency. Incorporating hybrid technologies combines the use of gasoline with electric motors for reduced fuel consumption. Using more energy-efficient engines reduces the amount of energy required for propulsion.

Question 2

Which of the following is FALSE regarding biodiesel?

Accepted Answer

Biodiesel is specifically designed for use in diesel engines and cannot be used in gasoline engines without modifications. This is because biodiesel and gasoline have different combustion properties.

Question 3

Refer to Infographic 5.Describe the production of grain ethanol and cellulosic ethanol.Why is it more challenging to produce ethanol from plants with high cellulose content compared with producing it from grain?

Accepted Answer

The answer of Refer to Infographic 5.Describe the production of...

Question 4

Which of the following is/are predicted to generate the most oil per acre in biodiesel production?

Accepted Answer

Algae has been identified as the most promising source of oil for biodiesel production. It has been estimated that algae can produce 30-100 times more oil per acre than other oilseed crops due to its rapid growth rate, high lipid content, and ability to grow in various environments.

Question 5

What has recently become an attractive alternative to using grains (corn)or sugarcane to make bioethanol? Briefly describe what sources are used and why its production efficiency is currently an issue.

Accepted Answer

The answer of What has recently become an attractive alternative...

Question 6

Refer to the following graphic and use the data to help describe how emissions from biofuels compare with those from gasoline.Also address how emissions from current biofuels compare to those from LIHD biofuels.

Accepted Answer

The answer of Refer to the following graphic and use...

Question 7

What are some advantages and disadvantages of using algae for biofuel?

Accepted Answer

The answer of What are some advantages and disadvantages of...

Question 8

Which of the following is the BEST option in terms of being environmentally friendly while operating a motor vehicle?

Accepted Answer

Biking or walking to work, school, or to run errands is the most environmentally friendly option as it produces no emissions and reduces reliance on motor vehicles.

Question 9

_____________ refers to the process where a plant absorbs carbon dioxide from the atmosphere and then stores carbon in its roots.

Accepted Answer

Carbon sequestration is the process of capturing and storing carbon from the atmosphere. Plants naturally do this through photosynthesis, where they absorb carbon dioxide and convert it into energy to grow, with some carbon stored in their roots and the soil. Therefore, D is the best choice.

Question 10

Ethanol can be produced from the biological fermentation of all of the following sources EXCEPT _________.

Accepted Answer

Ethanol can be produced from the biological fermentation of any plant material, including corn, algae, sugarcane, and switchgrass, as they all contain sugars or materials that can be converted into sugars for fermentation.

Question 11

How would the production of cellulosic ethanol circumvent the "food versus fuel" controversy?

Accepted Answer

The answer of How would the production of cellulosic ethanol...

Question 12

Driving habits that maximize mileage include all of the following EXCEPT _________.

Accepted Answer

Maintaining a constant speed of 70 miles per hour on the highway can actually decrease your fuel efficiency, as most vehicles have an optimal speed range between 55-65 miles per hour. Choosing a speed within this range can help maximize your mileage.

Question 13

What is a barrier to producing ethanol from cellulosic feedstocks on a large scale?

Accepted Answer

All of these answers are correct. Producing ethanol from cellulosic feedstocks on a large scale is slow, expensive, requires high temperatures, and can be energy-intensive. These factors have hindered the widespread adoption of this technology, despite its potential as a renewable fuel source. Research is ongoing to address these challenges and improve the efficiency and cost-effectiveness of producing ethanol from cellulosic feedstocks.

Question 14

Describe some benefits of making cellulosic ethanol from switchgrass.

Accepted Answer

The answer of Describe some benefits of making cellulosic ethanol...

Question 15

Which of the following is FALSE regarding biodiesel production?

Accepted Answer

Biodiesel is not formed directly from its feedstock. It is a multistep process that involves the transesterification of the feedstock with an alcohol, typically methanol or ethanol, in the presence of a catalyst.

Question 16

Which of the following is a challenge faced when making biofuel from algae?

Accepted Answer

The answer of Which of the following is a challenge...

Question 17

Which step is needed in cellulosic ethanol production that is not needed in production from grain ethanol?

Accepted Answer

The answer of Which step is needed in cellulosic ethanol...

Question 18

Refer to Infographic 5.In which step in the conversion of cellulose to ethanol is the raw material chopped or ground into small,uniform-sized pieces?

Accepted Answer

The answer of Refer to Infographic 5.In which step in...

Question 19

Which trade-off of traditional biofuels,like ethanol produced from corn,can be addressed by using algae as a biofuel source?

Accepted Answer

Using algae as a biofuel source can address all of the listed trade-offs of traditional biofuels. Algae can be grown using salt water, reducing the amount of fresh water needed. Since algae can be grown in controlled environments, there is less of an opportunity for overharvesting to occur. Additionally, algae can be grown in areas not suitable for agriculture, reducing the need for farmland.

Question 20

Which of the following is NOT a driving habit that maximizes mileage?

Accepted Answer

Keeping the car idling when parked briefly and avoiding turning the car on and off wastes fuel and decreases mileage. It is recommended to turn off the engine when parked for more than 30 seconds.

Quiz 32: Biofuels Gas From Grass