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How to use a water filter (pump, gravity, straw)
Contributed by: Roe
  • 1. What is the primary purpose of using a water filter?
A) To color water.
B) To heat water.
C) To remove harmful contaminants from water.
D) To add flavor to water.
  • 2. What type of filter relies solely on gravity to purify water?
A) Straw filter
B) Chemical treatment
C) Pump filter
D) Gravity filter
  • 3. Which type of water filter requires manual effort to push water through the filter?
A) Gravity filter
B) Boiling
C) Straw filter
D) Pump filter
  • 4. Which filter type allows you to drink directly from a water source?
A) Gravity filter
B) Pump filter
C) Sediment filter
D) Straw filter
  • 5. What is the most common contaminant that water filters remove?
A) Bacteria and protozoa
B) Minerals
C) Vitamins
D) Sugar
  • 6. Why is pre-filtering water (e.g., through a cloth) recommended?
A) To add minerals to the water.
B) To remove large particles and extend filter life.
C) To make the water taste better.
D) To change the color of water
  • 7. What is 'backflushing' in the context of water filters?
A) Removing the filter from the water source.
B) Storing the filter in a dry place
C) Adding chemicals to the filter.
D) Cleaning the filter by reversing water flow.
  • 8. How often should you clean a water filter?
A) Never.
B) Once a year.
C) According to the manufacturer's instructions.
D) Only when the water tastes bad.
  • 9. What should you do with the first few pumps/pours of filtered water?
A) Drink it; it's the purest water.
B) Store it for later.
C) Discard it, as it may contain manufacturing residue.
D) Use it to wash your hands.
  • 10. What is the biggest disadvantage of a straw filter?
A) It adds a strange taste to the water.
B) It requires batteries.
C) It can only be used for direct drinking.
D) It's too heavy.
  • 11. What type of water source is LEAST suitable for any water filter?
A) River water.
B) Lake water.
C) Saltwater.
D) Stream water.
  • 12. What is a sign that your water filter needs to be replaced?
A) The water tastes sweeter.
B) The filter becomes lighter.
C) The flow rate significantly decreases.
D) The filter changes color.
  • 13. How should you store a water filter when not in use for an extended period?
A) Store it in the freezer.
B) Clean and completely dry it.
C) Store it in direct sunlight.
D) Leave it wet in a sealed bag.
  • 14. Which of these does a typical water filter NOT remove?
A) Sediment
B) Bacteria
C) Dissolved salts
D) Protozoa
  • 15. Which of the following is NOT a good water source for a filter?
A) Spring-fed lake.
B) Fast-moving stream.
C) Stagnant puddle near a road.
D) Rainwater collected in a clean container.
  • 16. What is the most important factor to consider when choosing a water filter?
A) The type of contaminants you need to remove.
B) The price of the filter.
C) The weight of the filter.
D) The color of the filter.
  • 17. What maintenance step is crucial for pump filters with replaceable cartridges?
A) Oiling the handle.
B) Polishing the filter body.
C) Replacing the cartridge after its lifespan.
D) Sharpening the filter edges.
  • 18. What's the best practice when using a gravity filter at a campsite?
A) Bury the dirty water reservoir.
B) Hang the dirty water reservoir higher than the clean water reservoir.
C) Place both reservoirs at the same height.
D) Place the clean water reservoir higher.
  • 19. What does micron rating on a water filter indicate?
A) The price of the filter.
B) The weight of the filter.
C) The flow rate of the filter.
D) The size of particles the filter can remove.
  • 20. What could happen if you use a filter beyond its recommended lifespan?
A) It may no longer effectively remove contaminants.
B) The water will taste better.
C) The filter will become self-cleaning.
D) The flow rate will increase.
  • 21. What is the danger of drinking unfiltered water?
A) Causes a metallic aftertaste.
B) May cause dehydration.
C) Tastes unpleasant.
D) Risk of waterborne illnesses.
  • 22. In what situations is using a water filter most important?
A) In a restaurant.
B) At home with tap water.
C) Buying bottled water at the store.
D) Backcountry hiking or camping.
  • 23. What does 'potable' mean in the context of water?
A) Safe to drink.
B) Frozen.
C) Salty.
D) Extremely polluted.
  • 24. Why is it important to understand the limitations of your water filter?
A) To void the warranty.
B) To make it more expensive.
C) To know what contaminants it can and cannot remove.
D) To impress your friends.
  • 25. What type of water is often safest, but requires filtration for ideal quality?
A) Swamp water
B) Ocean water
C) Well water
D) Sewage water
  • 26. If your water filter breaks down, what is the BEST backup plan for water purification?
A) Boiling water.
B) Using sunscreen.
C) Building a fire for warmth.
D) Digging a deeper hole.
  • 27. What should you avoid doing when filling your dirty water reservoir for a gravity filter?
A) Using a container that is too large.
B) Touching the inside of the container with dirty hands.
C) Wearing gloves.
D) Filling it during daylight hours.
  • 28. Which of these features is MOST helpful in a pump-style water filter?
A) A built-in compass.
B) A built-in whistle.
C) A pre-filter to remove larger particles.
D) A bright color.
  • 29. What is an important safety precaution to take after using a water filter straw?
A) Store the straw in the sun.
B) Blow air back through the straw to clear any remaining water.
C) Bend the straw into a circle.
D) Submerge the straw in water.
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