TEXAS TCEQ OSSF Installer II
Comprehensive Resource To Help You Ace
2026-2027 Includes Frequently Tested
Questions With ELABORATED 100% Correct
COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!!
Current Update!!
1. Which term refers to disease-causing microorganisms transmitted into water
through feces?
A. Microorganisms
B. Bacteria
C. Pathogens
D. Viruses
2. Microorganisms are best defined as organisms that:
A. Cause disease in humans
B. Live only in water
C. Are too small to be seen without magnification
D. Are always harmful
3. Which statement correctly describes viruses?
A. They are larger than bacteria
B. They can reproduce independently
,C. They can only function and reproduce inside living cells
D. They are not considered pathogens
4. Which characteristic best describes bacteria?
A. Multicellular organisms
B. Require host cells for reproduction
C. Single-celled organisms capable of independent reproduction
D. Only found in wastewater
5. Bacteria, microorganisms, and viruses are all classified as:
A. Organic solids
B. Chemical contaminants
C. Pathogens
D. Nutrients
6. What is the approximate weight of one gallon of wastewater?
A. 7.48 pounds
B. 8.00 pounds
C. 8.34 pounds
D. 10.00 pounds
7. Which of the following are the three main areas of wastewater analysis?
A. Physical, organic, biological
B. Physical, chemical, bacteriological
C. Chemical, mechanical, biological
D. Solids, liquids, gases
, 8. What does TSS stand for in wastewater analysis?
A. Total Soluble Solids
B. Total Suspended Solids
C. Total Settled Solids
D. Total Sewage Strength
9. What does TDS stand for?
A. Total Dissolved Solids
B. Total Digestible Solids
C. Total Dispersed Solids
D. Total Decomposed Solids
10. Total solids (TS) in wastewater are calculated by which formula?
A. TS = BOD + DO
B. TS = TSS × TDS
C. TS = TSS + TDS
D. TS = COD + BOD
11. Which of the following is considered organic material in wastewater?
A. Chlorine
B. Carbohydrates
C. Metals
D. Salts
12. Which organic material stabilizes first during wastewater treatment?
A. Fats
B. Proteins
Comprehensive Resource To Help You Ace
2026-2027 Includes Frequently Tested
Questions With ELABORATED 100% Correct
COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!!
Current Update!!
1. Which term refers to disease-causing microorganisms transmitted into water
through feces?
A. Microorganisms
B. Bacteria
C. Pathogens
D. Viruses
2. Microorganisms are best defined as organisms that:
A. Cause disease in humans
B. Live only in water
C. Are too small to be seen without magnification
D. Are always harmful
3. Which statement correctly describes viruses?
A. They are larger than bacteria
B. They can reproduce independently
,C. They can only function and reproduce inside living cells
D. They are not considered pathogens
4. Which characteristic best describes bacteria?
A. Multicellular organisms
B. Require host cells for reproduction
C. Single-celled organisms capable of independent reproduction
D. Only found in wastewater
5. Bacteria, microorganisms, and viruses are all classified as:
A. Organic solids
B. Chemical contaminants
C. Pathogens
D. Nutrients
6. What is the approximate weight of one gallon of wastewater?
A. 7.48 pounds
B. 8.00 pounds
C. 8.34 pounds
D. 10.00 pounds
7. Which of the following are the three main areas of wastewater analysis?
A. Physical, organic, biological
B. Physical, chemical, bacteriological
C. Chemical, mechanical, biological
D. Solids, liquids, gases
, 8. What does TSS stand for in wastewater analysis?
A. Total Soluble Solids
B. Total Suspended Solids
C. Total Settled Solids
D. Total Sewage Strength
9. What does TDS stand for?
A. Total Dissolved Solids
B. Total Digestible Solids
C. Total Dispersed Solids
D. Total Decomposed Solids
10. Total solids (TS) in wastewater are calculated by which formula?
A. TS = BOD + DO
B. TS = TSS × TDS
C. TS = TSS + TDS
D. TS = COD + BOD
11. Which of the following is considered organic material in wastewater?
A. Chlorine
B. Carbohydrates
C. Metals
D. Salts
12. Which organic material stabilizes first during wastewater treatment?
A. Fats
B. Proteins
