5. Agricultural Engineering

Renewable Energy — Quiz

Test your understanding of renewable energy with 5 practice questions.

Practice Questions

Question 1

A farm is evaluating the economic viability of a new biogas digester. The initial investment is $$ \$250,000 $. It is projected to save $ \$30,000 $ annually in energy costs and generate an additional $ \$15,000 $$ annually from selling excess electricity. What is the simple payback period for this investment?

Question 2

Which of the following best describes the concept of 'grid defection' in the context of farm renewable energy systems?

Question 3

Beyond direct energy production, what is a significant ecological benefit of integrating solar photovoltaic (PV) systems on farms, particularly in arid or semi-arid regions, related to land management?

Question 4

Which of the following represents the most significant technical challenge for farms in rural areas when attempting to export a large surplus of renewable energy (e.g., from a substantial solar or wind installation) back to the main grid?

Question 5

A farm is considering a wind turbine installation. If the average wind speed at the proposed site is $ 10 \text{ m/s} $ and the turbine has a rotor diameter of $ 60 \text{ m} $, how does tripling the wind speed to $ 30 \text{ m/s} $ theoretically affect the power output, assuming all other factors remain constant?