Certified Hemodialysis Technologist/Technician Exam Water Treatment and Quality 3

Question 1

What does the term 'rejection rate' refer to in reverse osmosis?

Accepted Answer

Percentage of dissolved solids removed by the membrane

Answer

Percentage of bacteria removed

Answer

Rate at which water is rejected to drain

Answer

Number of contaminants rejected per hour

Question 2

Which chemical is NOT required to be tested in dialysis product water by AAMI/ISO standards?

Accepted Answer

Caffeine

Answer

Aluminum

Answer

Fluoride

Answer

Lead

Question 3

What is the purpose of a break point chlorination test in dialysis water treatment?

Accepted Answer

Determine the chloramine removal capacity of carbon tanks

Answer

Measure total dissolved solids

Answer

Check RO membrane integrity

Answer

Calibrate conductivity meters

Question 4

High aluminum levels in dialysis water can cause which serious patient complication?

Accepted Answer

Dialysis dementia and bone disease

Answer

Hyperkalemia

Answer

Hemolytic anemia

Answer

Metabolic alkalosis

Question 5

What is the acceptable conductivity range for dialysate used in standard hemodialysis?

Accepted Answer

13–17 mS/cm

Answer

2–4 mS/cm

Answer

8–16 mS/cm

Answer

20–25 mS/cm

Question 6

What is the primary reason dialysis facilities use two activated carbon tanks in series rather than one?

Accepted Answer

To provide redundancy so the second tank catches breakthrough from the first

Answer

To double the water flow rate

Answer

To reduce pressure drop

Answer

To alternate between chlorine and chloramine removal