Hotel Service Unit 14 Q4 Quiz

Correct Answer:
B) They kill micro-organisms by disrupting their cell walls and preventing reproduction

Explanation:
Silver ions are effective at killing bacteria and other pathogens by disrupting cellular structures, thereby preventing the organisms from growing and reproducing.

Correct Answer:
B) Algae

Explanation:
Algae can thrive in water systems with high nutrient levels, leading to algal blooms that can reduce water quality, affect clarity, and may produce toxins.

Correct Answer:
D) All of the above

Explanation:
All three — bacteria, viruses, and algae — can exist in untreated water, and each requires treatment to ensure safe drinking water. These organisms can cause illness if not properly managed.

Correct Answer:
B) Bacteria

Explanation:
Bacteria, especially pathogenic types like E. coli and Vibrio cholerae, are known to cause waterborne diseases, making their removal essential for safe drinking water.

Correct Answer:
B) It does not alter the taste or odor of water

Explanation:
Silver ion sterilization is odorless and tasteless, unlike chlorination, which can affect water taste and smell, making it preferable for potable water systems.

Correct Answer:
B) By using silver electrodes that release ions when an electric current is applied

Explanation:
The sterilizer uses silver electrodes to release silver ions into the water via an electric current. These ions act as a disinfectant, preventing microbial growth.

Correct Answer:
B) To kill bacteria and other harmful micro-organisms

Explanation:
The silver ions released by the sterilizer disrupt the cell walls of bacteria and prevent them from reproducing, making it an effective disinfection method for potable water.