CCHT Technical Practice Test 2025 – Questions and Answers

Last Updated on June 14, 2025

The Nephrology Nursing Certification Commission (NNCC) Certified Clinical Hemodialysis Technician (CCHT) Technical Practice Test 2025 – Questions and Answers Quiz. In the actual test, this part consists of 32 to 38 multiple-choice questions, which is approximately 21–25%.

Questions in this area concern the principles of water treatment, components of the extracorporeal circuit, and actions to take when alarms sound or machine-related problems arise. The Technical area is the second-largest part of the test, accounting for 23% of the test content. Examples of the kinds of technician activities tested in the Technical area include:

1. Participating in monitoring the water treatment system.
2. Checking the conductivity and pH of the dialysate solution with an independent device.
3. Mixing concentrates from powder (bicarbonate, electrolyte solution).
4. Processing patients’ laboratory samples.
5. Identifying/reporting/documenting an adverse event, e.g., equipment set-up problems.

CCHT Technical Practice Test

0%
29

Technical

1 / 50

1) If total chlorine exceeds limits, the technician must

2 / 50

2) Residual chlorine/chloramine checks must be performed at minimum

3 / 50

3) Dialysate hotter than 41 °C may cause

4 / 50

4) After bleach disinfection, the circuit is rinsed until total chlorine is

5 / 50

5) The venous-line ultrasonic sensor is designed to detect

6 / 50

6) When arterial pressure alarm is high, the technician should first

7 / 50

7) Running an acid rinse primarily

8 / 50

8) Conductivity meters indirectly measure the concentration of

9 / 50

9) Dialysate pH of 6.6 measured with pH paper means the technician should

10 / 50

10) The proportioning system on a dialysis machine

11 / 50

11) A dialysis machine goes into bypass when dialysate conductivity is

12 / 50

12) A post-dialysis BUN specimen is drawn after reducing blood flow to 100 mL/min for

13 / 50

13) Heat disinfection of dialysis machines is commonly performed

14 / 50

14) RO membranes are chemically cleaned when product-water flow drops by about

15 / 50

15) Before opening the circuit to draw a sample, you must

16 / 50

16) According to AAMI standards, the action level for total chlorine (free + combined) post-carbon tank is

17 / 50

17) A conductivity meter is usually calibrated with a standard solution reading about

18 / 50

18) A persistent high venous pressure alarm usually indicates

19 / 50

19) The AAMI action level for endotoxin in product water is

20 / 50

20) To verify dialysate pH, the handheld meter is calibrated with

21 / 50

21) Acceptable dialysate pH prior to patient connection is

22 / 50

22) A positive blood-leak strip changes color from white to

23 / 50

23) The primary purpose of a reverse osmosis (RO) unit in the dialysis water-treatment system is to

24 / 50

24) During a total power failure, the technician should first

25 / 50

25) Bicarbonate concentrate must be mixed with

26 / 50

26) At power-up, a dialysis machine self-test includes

27 / 50

27) Hardness testing after softener regeneration should read

28 / 50

28) After chemical disinfection, dialysis machines cannot be used until residual disinfectant tests

29 / 50

29) Bicarbonate concentrate mixed from powder must be discarded after

30 / 50

30) The arterial pressure monitor is located

31 / 50

31) A dialysate temperature alarm will place the machine into

32 / 50

32) AAMI requires product water microbial counts to be <

33 / 50

33) Which component specifically removes bacterial endotoxins from product water?

34 / 50

34) A simultaneous low venous pressure alarm and bleeding at the needle site most likely indicate

35 / 50

35) Pyrogenic reactions are most often traced to

36 / 50

36) The usual order of water-treatment components is

37 / 50

37) Maintaining loop velocity at ≥ 3 ft / sec helps

38 / 50

38) Independent conductivity reading must agree with the machine within

39 / 50

39) A high conductivity reading means dialysate has

40 / 50

40) Water softeners remove

41 / 50

41) Proper blood pump occlusion is verified using a

42 / 50

42) Pre-dialysis potassium samples are drawn from the

43 / 50

43) Monthly water cultures are drawn from

44 / 50

44) Typical RO reject (drain) water volume equals roughly

45 / 50

45) For post-dialysis BUN, the correct tube is typically

46 / 50

46) Any equipment-related adverse event such as a dialyzer rupture must be

47 / 50

47) Activated carbon tanks primarily remove

48 / 50

48) Acid concentrate containers are color-coded

49 / 50

49) Transmembrane pressure (TMP) refers to the

50 / 50

50) First action when a blood-leak alarm sounds is to

Your score is

See also: