Hotel Service Unit 10 Q1 Quiz

Hotel Service Unit 10 Sewage Q1

1 / 6

Which MARPOL Annex deals with the disposal of sewage from ships?

D) Annex VI

B) Annex III

A) Annex I

C) Annex IV

2 / 6

How is chlorination of the final discharge from a sewage treatment plant carried out and monitored?

A) By adding chlorine manually and checking pH levels

B) By automatic dosing of chlorine, with regular checks on chlorine levels in the discharge

D) By adding chlorine gas and monitoring the temperature of the sewage

C) By boiling the sewage and testing for oxygen content

3 / 6

When can sewage that has been comminuted and disinfected be discharged according to MARPOL Annex IV?

C) Within port waters

B) At least 4 nautical miles from the nearest land, provided the ship is en route

A) Within 3 nautical miles of the nearest land

D) Only in designated areas

4 / 6

What is the correct chlorine content of the final sewage discharge after treatment?

B) 1 ppm

C) 0.5 ppm

A) 5 ppm

D) 10 ppm

5 / 6

According to MARPOL Annex IV, when can untreated sewage be discharged into the sea?

C) At any distance from shore, as long as the ship is stationary

D) Within an Emission Control Area (ECA)

B) At least 12 nautical miles from the nearest land, provided the ship is en route

A) Within 1 mile of the nearest land

6 / 6

Why is the final discharge from an approved sewage treatment plant chlorinated before discharge?

A) To increase the volume of discharge

D) To make the discharge more visible

B) To disinfect the treated sewage and kill any remaining pathogens before it is released into the sea

C) To neutralize the pH of the discharge

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