After adding purification solution to the canteen, which action should be performed next?

After adding purification solution to the canteen, which action should be performed next?

• A. Tighten cap
• B. Shake the canteen
• C. Lose cap and tilt for leakage around threads
• D. Wait additional 30 min

Answer: (B)

Mixing thoroughly after adding purification solution ensures the disinfectant is evenly distributed so every part of the water is treated. This step is essential because without uniform distribution, some water may remain untreated and pathogens could survive. Shaking the canteen achieves rapid, uniform contact between the disinfectant and the water, which is why it’s done next. The other actions don’t achieve immediate distribution: tightening the cap would prevent mixing; loosening the cap to tilt could cause leakage and doesn’t improve distribution; waiting longer without mixing delays the disinfection process. After this mixing, you would then wait the required contact time before drinking.

Mixing thoroughly after adding purification solution ensures the disinfectant is evenly distributed so every part of the water is treated. This step is essential because without uniform distribution, some water may remain untreated and pathogens could survive. Shaking the canteen achieves rapid, uniform contact between the disinfectant and the water, which is why it’s done next. The other actions don’t achieve immediate distribution: tightening the cap would prevent mixing; loosening the cap to tilt could cause leakage and doesn’t improve distribution; waiting longer without mixing delays the disinfection process. After this mixing, you would then wait the required contact time before drinking.