REP Bioenergy and Waste-to-Energy 4

Question 1

Under the U.S. Renewable Fuel Standard (RFS), which biofuel pathway requires at least a 60% lifecycle greenhouse gas reduction compared to the petroleum baseline?

Accepted Answer

Cellulosic biofuel

Answer

Cellulosic biofuel under RFS requires a minimum 60% lifecycle GHG reduction, the highest threshold among RFS fuel categories.

Question 2

Which emission control technology is specifically designed to reduce dioxin and furan emissions from municipal solid waste incinerators?

Accepted Answer

Activated carbon injection upstream of fabric filters

Answer

Activated carbon injection adsorbs dioxins and furans before they are captured in fabric filter baghouses, achieving over 99% removal efficiency.

Question 3

What is the primary purpose of the tipping floor in a mass-burn waste-to-energy facility?

Accepted Answer

Receiving, inspecting, and blending incoming waste before combustion

Answer

The tipping floor is where waste trucks deposit loads, operators inspect for prohibited materials, and waste is blended to maintain consistent fuel quality.

Question 4

Which economic incentive mechanism allows biomass electricity generators in the U.S. to sell renewable energy certificates separate from the electricity itself?

Accepted Answer

Renewable Portfolio Standards (RPS) creating REC markets

Answer

State RPS programs create demand for renewable energy certificates (RECs), allowing biomass generators to monetize the renewable attribute separately from electricity sales.

Question 5

Torrefaction of biomass produces a product with improved properties primarily due to which chemical change?

Accepted Answer

Partial decomposition of hemicellulose increasing energy density and hydrophobicity

Answer

Torrefaction at 200–300°C decomposes hemicellulose, increasing energy density, reducing moisture uptake, and improving grindability for pellet and co-firing applications.

(REP) Certified Renewable Energy Professional Practice Test

(REP) Certified Renewable Energy Professional Practice Test

REP Bioenergy and Waste-to-Energy 4