Hotel Service Unit 10 Q2 Quiz

Hotel Service Unit 10 Sewage Q2

1 / 4

Why is calcium hypochlorite added to treated sewage before discharge overboard?

A) To neutralize the pH of the discharge

B) To disinfect the treated sewage by killing remaining bacteria and pathogens

C) To increase the volume of the discharge

D) To make the discharge sink faster

2 / 4

Why is air bubbled through the effluent in the aeration tank of a sewage treatment plant?

C) To remove solid particles

B) To provide oxygen to aerobic microorganisms, enhancing the breakdown of organic matter

A) To improve the temperature of the effluent

D) To keep the effluent in motion

3 / 4

What is the main difference between aerobic and anaerobic microorganisms in sewage treatment?

D) Aerobic microorganisms digest solid waste, while anaerobic ones digest liquid waste

C) Aerobic microorganisms thrive in water, while anaerobic ones need dry environments

B) Aerobic microorganisms need oxygen to break down waste, while anaerobic ones do not require oxygen

A) Aerobic microorganisms require sunlight, while anaerobic ones need darkness

4 / 4

What is the purpose of the vent in a sewage treatment plant, and why is it fitted with gauze?

C) To allow fuel to enter the system, and the gauze maintains temperature

D) To control temperature, and the gauze acts as a filter for solids

A) To release excess air, and the gauze prevents fuel leakage

B) To release gases produced during sewage breakdown, and the gauze prevents insects and debris from entering the system

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