EXIT

Module 8: Water Treatment Self-Test Sample Questions

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* 1. Why is a cartridge filter always placed before the reverse osmosis membrane?

To catch endotoxin before it can pass through the RO membrane

To remove bacteria that could form biofilm on the RO membrane

To catch debris and particles that could tear the RO membrane

To ensure the correct water temperature for the RO membrane

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* 2. How much empty bed contact time does CMS require for water in the carbon tanks?

At least 1 hour (30 minutes per tank)

At least 10 minutes (5 minutes per tank)

At least 10 seconds (5 second per tank)

At least 2 hours (1 hour per tank)

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* 3. What substances besides chlorine and chloramines can carbon tanks remove from water?

Bacteria and endotoxin

Pesticides and solvents

Aluminum and iron

Sand and grit

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* 4. Dialysis clinics can choose to set hemodialysis water treatment standards that are:

More stringent than the CMS standards

Less stringent than the CMS standards

About the same as the CMS standards

Completely different than the CMS standards

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* 5. Chlorine or chloramines are added to tap water to remove:

Sediment

Dissolved particles

Microbes

Heavy metals

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* 6. Which of the following are true of granular activated carbon used in dialysis water treatment?

May be made of seashells, green treated lumber, or pumice

Must be alkaline-washed to prevent ash and metal leaching

Comes in mesh sizes, needs an iodine rating greater than 900

Can be backwashed with RO water and used indefinitely

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* 7. What can harm an RO membrane?

Bacteria, endotoxin, viruses

Chlorine, peracetic acid, scale

Sodium, potassium, magnesium

Aluminum, copper, zinc

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* 8. How must dialysis clinics ensure that water from an exhausted DI tank cannot reach patients?

An alarm that stops the blood pump

A stop-valve or divert to drain system

An alarm that stops the dialysate flow

Activating the venous line clamp

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* 9. How does an Action Level for a substance relate to its Maximum Allowable level?

Action levels are always lower

Action levels are always the same

Action levels are always higher

Action levels can be higher or lower

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* 10. What should you see in a water treatment system before and after the booster pump?

A pressure gauge

A sediment filter

A temperature gauge

A pH gauge