Water Pasteurization Indicator Concepts

Bill demonstrates the use of a water pasteurization indicator, which uses wax to determine if water has reached a safe temperature for drinking. The experiment involves heating water to 150°F, observing the wax melting, and ensuring the water remains at a safe temperature for a sufficient time. Bill concludes with recommendations for using a thermometer to ensure water safety, especially in fuel-limited situations.

What is the primary function of a water pasteurization indicator?

• To filter impurities from water

• To indicate when water reaches a safe temperature for drinking

• To add minerals to water

• To measure the pH level of water

What is the significance of the wax inside the pasteurization indicator?

• It changes color to indicate water purity

• It melts to show the water has reached a certain temperature

• It absorbs impurities from the water

• It acts as a cooling agent

What is the first step in setting up the experiment?

• Inserting the thermometer

• Covering the pot

• Adding salt to the water

• Boiling the water

What happens when the green wax melts in the pasteurization indicator?

• It evaporates

• It solidifies immediately

• It changes color

• It runs down to the bottom of the tube

At what temperature does the wax in the pasteurization indicator start to melt?

• 120°F

• 150°F

• 180°F

• 200°F

What was the peak temperature reached during the experiment?

• 150°F

• 180°F

• 170°F

• 160°F

How long did the water remain at or above 150°F?

• 20 minutes

• 5 minutes

• 10 minutes

• 15 minutes

What is a suggested use for the pasteurization indicator in practical scenarios?

• For industrial water treatment

• For cooking purposes

• In areas with abundant fuel

• In places with no access to fuel

What is the recommended temperature range to ensure water safety according to the experiment?

• 200°F to 220°F

• 165°F to 190°F

• 150°F to 160°F

• 120°F to 130°F

What is the main takeaway from the experiment regarding water pasteurization?

• Water should be cooled rapidly

• Wax should be replaced after each use

• Boiling is always necessary

• A thermometer is essential for accuracy