Hotel Service Unit 13 Q3 Quiz

Correct Answer:
B) By disrupting the DNA of bacteria and preventing them from reproducing

Explanation:
UV light sterilizes water by disrupting bacterial DNA, which stops them from reproducing and renders the bacteria harmless.

Correct Answer:
B) It does not remove impurities or suspended particles, which can shield bacteria from UV exposure

Explanation:
UV light is effective only if the water is clear. Suspended particles can shield bacteria from the UV rays, allowing bacteria to survive. Pre-filtering the water is necessary to ensure effective sterilization.

Correct Answer:
B) It is odorless and does not affect water taste

Explanation:
Silver ion sterilization is effective in killing bacteria without altering the taste, smell, or appearance of water, making it a preferred option for potable water sterilization.

Correct Answer:
B) By pre-filtering the water to remove particles and impurities

Explanation:
Pre-filtering removes particles that may shield bacteria, allowing UV light to directly reach and sterilize bacteria in the water, enhancing the efficiency of the process.

Correct Answer:
B) Inside a clear, UV-transparent tube through which the water passes

Explanation:
The UV light is contained within a transparent tube, allowing water to pass through and be exposed to UV rays without direct contact, ensuring effective bacterial sterilization.

Correct Answer:
B) Silver electrodes

Explanation:
Silver electrodes are used to release ions into the water, which then sterilize it by preventing bacterial reproduction.

Correct Answer:
B) By releasing positively charged silver ions into the water, which disrupt bacterial cell walls and prevent reproduction

Explanation:
The silver ion method releases silver ions into the water, which interact with bacterial cell walls, preventing their ability to reproduce and thus sterilizing the water. This method is effective in controlling bacterial growth.