To ensure potable water of drinking quality,...

Question 1 / 205eccef9cbacbc34ba4d458c3

Question 1 of 205eccef9cbacbc34ba4d458c3

To ensure potable water of drinking quality, chemical treatment is required for reverse-osmosis freshwater generators. What is the purpose of chemical pre-treatment?

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Question 1 of 20

5eccef9cbacbc34ba4d458c3

To ensure potable water of drinking quality, chemical treatment is required for reverse-osmosis freshwater generators. What is the purpose of chemical pre-treatment?

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🔍 Key Concepts

• Reverse osmosis (RO) flow path: sea water inlet → pre‑treatment → RO membranes → product (fresh) water → possible post‑treatment • Difference between mechanical filtration (screens, cartridge filters) and chemical treatment (chlorine/biocides, antiscalants, etc.) • Difference between pre‑treatment (before the RO membranes) and post‑treatment (after the fresh water is produced)

💭 Think About

• Ask yourself: At what point in the system does pre‑treatment act – on the incoming seawater or on the outgoing fresh water? • Which option is describing something that would more likely be done by filters/strainers rather than by chemicals? • Which options clearly refer to sterilizing (killing microorganisms) and which to removing solids – and where in the flow path would each of those make the most sense as a chemical step before the RO membranes?

✅ Before You Answer

• Identify whether pre‑treatment should be applied to the feed seawater or the product freshwater. • Decide which process (removing particles vs. sterilizing) is more realistically achieved chemically rather than just by physical filters. • Eliminate any choice that clearly describes a step that would logically be called post‑treatment, i.e., something done after the RO unit, just before storage or distribution.

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Question 1 of 20

To ensure potable water of drinking quality, chemical treatment is required for reverse-osmosis freshwater generators. What is the purpose of chemical pre-treatment?

Chemical pre-treatment removes particulate matter and suspended solids from the sea water inlet to the unit to prevent fouling of the membrane modules.

Chemical pre-treatment removes particulate matter and suspended solids from the freshwater leaving the unit prior to distribution to the various freshwater storage tanks.

Chemical pre-treatment sterilizes the sea water entering the unit to prevent bacteria from becoming resident in the reverse-osmosis unit filters and membrane modules.

Chemical pre-treatment sterilizes the freshwater leaving the unit prior to distribution to the various freshwater storage tanks.

Question 1 / 205eccef9cbacbc34ba4d458c3

Question 1 of 205eccef9cbacbc34ba4d458c3

To ensure potable water of drinking quality, chemical treatment is required for reverse-osmosis freshwater generators. What is the purpose of chemical pre-treatment?

Back

Question 1 of 20

5eccef9cbacbc34ba4d458c3

To ensure potable water of drinking quality, chemical treatment is required for reverse-osmosis freshwater generators. What is the purpose of chemical pre-treatment?

No comments yet

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If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

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