OSSF INSTALLER 1 LICENSE EXAM
QUESTIONS AND ANSWERS WITH
WELL DETAILED ANSWERS (LATEST
UPDATE 2026) UPDATE!! | LATEST
UPDATE 2025\2026
1. In the hydrologic cycle, water moves into the atmosphere through which two
processes?
Answer: Evaporation and transpiration.
2. What is groundwater?
Answer: Water that collects beneath the Earth's surface in porous, permeable, water-bearing
formations called aquifers.
3. What is surface water?
Answer: Water found above ground in lakes, rivers, streams, creeks, and reservoirs.
4. How are water table aquifers recharged?
Answer: Local percolation.
5. What are seepage pits?
Answer: Rock-filled or lined pits dug at least 4 feet deep at the end of a septic tank absorption
field system.
, 6. What are cesspools?
Answer: Pits constructed in permeable soil with open-jointed material along the sides that
receive direct discharge of raw wastewater.
7. How are waterborne diseases transmitted?
Answer: Pathogens from feces enter the water supply and infect people who consume or use the
contaminated water.
8. What are the three primary routes of contamination from on-site sewage
systems?
Answer:
1. Neighborhood pollution
2. Groundwater contamination
3. Surface water pollution
9. Name two problems caused by neighborhood pollution.
Answer:
Spread of disease
Vectors such as flies and roaches
Odors and unsightly conditions
Reduced property values
Neighbor disputes
10. Why is acceptable quality water vital?
Answer: It sustains human life, the environment, and economic activities.
QUESTIONS AND ANSWERS WITH
WELL DETAILED ANSWERS (LATEST
UPDATE 2026) UPDATE!! | LATEST
UPDATE 2025\2026
1. In the hydrologic cycle, water moves into the atmosphere through which two
processes?
Answer: Evaporation and transpiration.
2. What is groundwater?
Answer: Water that collects beneath the Earth's surface in porous, permeable, water-bearing
formations called aquifers.
3. What is surface water?
Answer: Water found above ground in lakes, rivers, streams, creeks, and reservoirs.
4. How are water table aquifers recharged?
Answer: Local percolation.
5. What are seepage pits?
Answer: Rock-filled or lined pits dug at least 4 feet deep at the end of a septic tank absorption
field system.
, 6. What are cesspools?
Answer: Pits constructed in permeable soil with open-jointed material along the sides that
receive direct discharge of raw wastewater.
7. How are waterborne diseases transmitted?
Answer: Pathogens from feces enter the water supply and infect people who consume or use the
contaminated water.
8. What are the three primary routes of contamination from on-site sewage
systems?
Answer:
1. Neighborhood pollution
2. Groundwater contamination
3. Surface water pollution
9. Name two problems caused by neighborhood pollution.
Answer:
Spread of disease
Vectors such as flies and roaches
Odors and unsightly conditions
Reduced property values
Neighbor disputes
10. Why is acceptable quality water vital?
Answer: It sustains human life, the environment, and economic activities.
