Hotel Service Unit 10 Q6 Quiz

Correct Answer:
A) Aerobic microorganisms need oxygen to break down waste, while anaerobic microorganisms do not

Explanation:
Aerobic microorganisms require oxygen to break down organic matter, while anaerobic microorganisms operate in environments without oxygen, breaking down waste through a different metabolic process.

Correct Answer:
B) Methane, hydrogen sulfide, and carbon dioxide

Explanation:
In anaerobic conditions, microorganisms produce methane (CH₄), hydrogen sulfide (H₂S), and carbon dioxide (CO₂) as by-products of breaking down organic waste. These gases are potentially harmful and need to be managed carefully.

Correct Answer:
B) They displace oxygen, causing a risk of asphyxiation and hydrogen sulfide is toxic even at low concentrations

Explanation:
In confined spaces, gases like methane and carbon dioxide displace oxygen, which can lead to asphyxiation. Hydrogen sulfide is particularly dangerous as it is highly toxic and can cause death even at low concentrations, in addition to having a characteristic rotten egg smell.

Correct Answer:
A) Black water comes from toilets, while grey water comes from sinks, showers, and galley drains

Explanation:
Black water refers to waste that contains fecal matter and urine, primarily from toilets. Grey water is wastewater from sinks, showers, and kitchen drains, which does not contain human waste but may contain soap, grease, and food particles.