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