Agricultural/Bioengineering Renewable Energy 2

Question 1

Which anaerobic digestion product can be used directly as a vehicle fuel after upgrading to remove CO2?

Accepted Answer

Biogas (biomethane)

Answer

Syngas

Answer

Producer gas

Answer

Hydrogen

Question 2

In a wind energy system for an agricultural operation, what is the purpose of a charge controller?

Accepted Answer

Prevents battery overcharging by regulating current flow

Answer

Converts AC to DC power

Answer

Increases turbine rotational speed

Answer

Measures wind velocity at hub height

Question 3

A farm uses a micro-hydropower turbine. If flow rate doubles but head remains constant, how does power output change?

Accepted Answer

Power doubles

Answer

Power quadruples

Answer

Power increases by 50%

Answer

Power remains the same

Question 4

Which feedstock produces the highest methane yield per unit of volatile solids in anaerobic digestion?

Accepted Answer

Fats and oils

Answer

Carbohydrates

Answer

Proteins

Answer

Lignocellulosic biomass

Question 5

What does the term 'net metering' allow agricultural solar installations to do?

Accepted Answer

Sell excess electricity back to the grid and receive credit on utility bills

Answer

Measure net solar radiation reaching panels

Answer

Operate independently from the utility grid

Answer

Monitor real-time energy consumption

Question 6

In bioengineering, which enzyme complex is responsible for breaking down cellulose into fermentable sugars?

Accepted Answer

Cellulase

Answer

Amylase

Answer

Lipase

Answer

Protease

Question 7

A solar thermal collector on a grain dryer has an efficiency of 60% and receives 800 W/m² insolation. What is the useful heat output per square meter?

Accepted Answer

480 W/m²

Answer

320 W/m²

Answer

600 W/m²

Answer

800 W/m²