Texas Composting Facility Operator
Certification Practice Exam Questions
And Correct Answers (Verified Answers)
Plus Rationales 2025|2026 Q&A |
Instant Download Pdf
1. What is the primary goal of composting?
A. To incinerate waste
B. To remove all organic matter
C. To convert organic waste into a stable, humus-like product
D. To create landfill gas
Composting stabilizes organic waste by microbial decomposition,
creating nutrient-rich compost.
2. Which of the following materials is best suited for composting?
A. Glass bottles
B. Grass clippings
C. Aluminum cans
D. Styrofoam
Grass clippings are organic materials that break down easily and
contribute nitrogen to the compost.
,3. What is the ideal Carbon to Nitrogen (C:N) ratio for effective
composting?
A. 5:1
B. 30:1
C. 100:1
D. 10:1
A C:N ratio of around 30:1 promotes microbial activity without excess
odor or slow decomposition.
4. Which organisms are primarily responsible for composting?
A. Birds
B. Worms
C. Microorganisms
D. Insects
Bacteria, fungi, and other microbes break down organic materials in
the composting process.
5. What is the ideal temperature range for thermophilic composting?
A. 0–20°C
B. 20–30°C
C. 40–70°C
D. 80–100°C
Thermophilic microbes thrive at 40–70°C, which helps kill pathogens
and weed seeds.
6. What is leachate in composting?
A. The final product
B. Dust particles from turning compost
C. Liquid that drains from the compost pile
D. Gas produced by microbes
Leachate is the liquid that filters through compost and may carry
contaminants.
, 7. Which of the following is a benefit of compost use?
A. Depletes soil nutrients
B. Reduces water retention
C. Increases waste to landfill
D. Enhances soil structure and fertility
Compost improves soil texture, nutrient content, and water-holding
capacity.
8. What does the Texas Commission on Environmental Quality (TCEQ)
regulate?
A. Only landfills
B. All composting facilities
C. Residential gardens
D. Farmer’s markets
TCEQ sets requirements for the operation and permitting of
composting facilities in Texas.
9. Which of the following is considered an unacceptable feedstock in
composting?
A. Leaves
B. Manure
C. Hazardous waste
D. Food scraps
Hazardous waste poses environmental and health risks and cannot
be composted.
10. What is windrow composting?
A. Composting in sealed drums
B. Composting in long rows that are turned regularly
C. Composting under water
D. Freezing organic waste
Certification Practice Exam Questions
And Correct Answers (Verified Answers)
Plus Rationales 2025|2026 Q&A |
Instant Download Pdf
1. What is the primary goal of composting?
A. To incinerate waste
B. To remove all organic matter
C. To convert organic waste into a stable, humus-like product
D. To create landfill gas
Composting stabilizes organic waste by microbial decomposition,
creating nutrient-rich compost.
2. Which of the following materials is best suited for composting?
A. Glass bottles
B. Grass clippings
C. Aluminum cans
D. Styrofoam
Grass clippings are organic materials that break down easily and
contribute nitrogen to the compost.
,3. What is the ideal Carbon to Nitrogen (C:N) ratio for effective
composting?
A. 5:1
B. 30:1
C. 100:1
D. 10:1
A C:N ratio of around 30:1 promotes microbial activity without excess
odor or slow decomposition.
4. Which organisms are primarily responsible for composting?
A. Birds
B. Worms
C. Microorganisms
D. Insects
Bacteria, fungi, and other microbes break down organic materials in
the composting process.
5. What is the ideal temperature range for thermophilic composting?
A. 0–20°C
B. 20–30°C
C. 40–70°C
D. 80–100°C
Thermophilic microbes thrive at 40–70°C, which helps kill pathogens
and weed seeds.
6. What is leachate in composting?
A. The final product
B. Dust particles from turning compost
C. Liquid that drains from the compost pile
D. Gas produced by microbes
Leachate is the liquid that filters through compost and may carry
contaminants.
, 7. Which of the following is a benefit of compost use?
A. Depletes soil nutrients
B. Reduces water retention
C. Increases waste to landfill
D. Enhances soil structure and fertility
Compost improves soil texture, nutrient content, and water-holding
capacity.
8. What does the Texas Commission on Environmental Quality (TCEQ)
regulate?
A. Only landfills
B. All composting facilities
C. Residential gardens
D. Farmer’s markets
TCEQ sets requirements for the operation and permitting of
composting facilities in Texas.
9. Which of the following is considered an unacceptable feedstock in
composting?
A. Leaves
B. Manure
C. Hazardous waste
D. Food scraps
Hazardous waste poses environmental and health risks and cannot
be composted.
10. What is windrow composting?
A. Composting in sealed drums
B. Composting in long rows that are turned regularly
C. Composting under water
D. Freezing organic waste
