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?

D) To make the discharge sink faster

C) To increase the volume of the discharge

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

A) To neutralize the pH of the discharge

2 / 4

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

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

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

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

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

3 / 4

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

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

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

4 / 4

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

D) To keep the effluent in motion

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

C) To remove solid particles

A) To improve the temperature of the effluent

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