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How to collect rainwater safely - Exam
Contributed by: Roe
  • 1. What is the FIRST step in setting up a safe rainwater harvesting system?
A) Installing a fancy filtration system.
B) Buying a large storage tank.
C) Assess local regulations and requirements.
D) Painting the collection surface.
  • 2. What is a common material to AVOID using for a rainwater collection surface?
A) Concrete roofing
B) Asphalt roofing
C) Clay tile roofing
D) Metal roofing
  • 3. Which of these is a crucial component to prevent debris from entering your storage tank?
A) A solar-powered bubbler.
B) Leaf screen or gutter guard
C) A pump with high pressure.
D) A brightly colored tank.
  • 4. Why is a 'first flush diverter' important?
A) It removes the initial contaminated rainwater runoff.
B) It filters the water after it is stored.
C) It measures the amount of rainfall.
D) It adds minerals to the water.
  • 5. What is the primary purpose of a storage tank in a rainwater harvesting system?
A) To increase rainfall amounts.
B) To hold the collected rainwater for later use.
C) To filter the rainwater.
D) To evaporate excess rainwater.
  • 6. What material is generally considered safe for a rainwater storage tank?
A) Food-grade plastic
B) Untreated wood
C) Galvanized steel
D) Copper
  • 7. How should you protect your rainwater storage tank from sunlight?
A) Use an opaque tank or paint it a light color.
B) Place a mirror on top of it.
C) Wrap it in dark cloth.
D) Heat the tank with a heater.
  • 8. Why is it important to prevent algae growth in your rainwater tank?
A) Algae makes the water look cleaner.
B) Algae prevents freezing in winter.
C) Algae can contaminate the water and affect its taste.
D) Algae increases the amount of usable water.
  • 9. Which of these is a common method for disinfecting harvested rainwater for potable use (after filtration)?
A) Adding dirt.
B) Boiling briefly
C) Adding sugar.
D) Ultraviolet (UV) light
  • 10. How often should you clean your rainwater harvesting system, including gutters and tanks?
A) Once every five years.
B) At least twice a year
C) Never.
D) Only when it rains.
  • 11. What is a common maintenance task for rainwater harvesting systems?
A) Adding fertilizer to the tank.
B) Inspecting and cleaning filters.
C) Painting the roof black.
D) Removing all the water every week.
  • 12. What type of water is generally safe to collect for non-potable use?
A) Water from swamps.
B) Water from puddles.
C) Water from industrial runoff.
D) Rainwater from clean rooftops.
  • 13. What should you do before using collected rainwater for drinking?
A) Boil it once.
B) Add a little bleach.
C) Just let it sit in the sun.
D) Filter and disinfect it thoroughly.
  • 14. What is a benefit of using rainwater for irrigation?
A) It is naturally soft and free of chlorine.
B) It contains lots of fertilizer.
C) It is often highly acidic.
D) It is always extremely hot.
  • 15. Which of these is NOT a typical non-potable use for rainwater?
A) Washing cars
B) Watering plants
C) Flushing toilets
D) Drinking water without treatment
  • 16. What can cause contamination in a rainwater harvesting system?
A) Regular rainfall.
B) Animal droppings on the roof.
C) Having a clean storage tank.
D) Using a leaf screen.
  • 17. What is a backflow preventer used for in a rainwater harvesting system?
A) To increase water pressure.
B) To clean the tank.
C) To prevent rainwater from flowing back into the municipal water supply.
D) To measure the amount of rainwater.
  • 18. Which of these is a good way to minimize mosquito breeding in your rainwater tank?
A) Ensure the tank is sealed.
B) Introduce stagnant water.
C) Add sugar to the water.
D) Leave the tank open to attract mosquito predators.
  • 19. What is the purpose of filtration in a rainwater harvesting system?
A) To increase the amount of water collected.
B) To change the color of the water.
C) To add minerals to the water.
D) To remove sediment, debris, and other particles.
  • 20. How can you test the quality of your harvested rainwater?
A) Send a sample to a certified laboratory.
B) By looking at it.
C) By tasting it.
D) By smelling it.
  • 21. What type of filter is typically used as a pre-filter in a rainwater harvesting system?
A) Water softener
B) Reverse osmosis filter
C) Sediment filter
D) Carbon filter
  • 22. What is the best practice regarding pipe materials used for rainwater collection?
A) Use pipes made from food-grade or potable water-safe materials.
B) Use any kind of pipe available.
C) Use lead pipes.
D) Use old rusty pipes.
  • 23. What is the purpose of an overflow pipe on a rainwater storage tank?
A) To clean the inside of the tank.
B) To allow excess water to escape when the tank is full.
C) To measure the water level.
D) To add water to the tank.
  • 24. Why is it important to label your rainwater harvesting system clearly?
A) To identify it as non-potable water for irrigation and other uses.
B) To prevent theft of the water.
C) To make it look more attractive.
D) To increase the value of your property.
  • 25. Which of the following is a potential health risk associated with untreated rainwater?
A) Increased hydration.
B) Improved skin health.
C) Enhanced immunity.
D) Exposure to bacteria and parasites.
  • 26. How can you prevent leaves and debris from clogging your gutters?
A) Use a pressure washer every day.
B) Install gutter guards or screens.
C) Paint the gutters a bright color.
D) Remove the gutters entirely.
  • 27. What is a key consideration when choosing the location for your rainwater tank?
A) A location far from your house.
B) A location directly under a tree.
C) A level and stable surface.
D) A location near a power outlet.
  • 28. What is a potential consequence of using contaminated rainwater for irrigation?
A) Reduced water consumption.
B) Improved soil drainage.
C) Contamination of soil and plants.
D) Increased plant growth.
  • 29. Which of these is an advantage of a closed rainwater harvesting system over an open one?
A) Reduced risk of contamination and evaporation.
B) Easier access to the water.
C) More natural sunlight exposure.
D) Lower installation cost.
  • 30. When should you empty and clean your rainwater tank?
A) Only when it rains.
B) When sediment or debris accumulates at the bottom.
C) Every day.
D) Never.
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