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Free CHT Practice Questions

10 free, exam-style CHT (CHT) practice questions with answers and explanations. No signup required. Work through them below, then take the full free CHT practice test to study every exam domain.

These 10 free CHT questions are organized by exam domain, so you can see how each part of the CHT blueprint is tested. Reveal the answer and explanation under each question.

Domain 1: Patient Care 45% of exam

Question 1

During a hemodialysis treatment, air is suspected in the venous bloodline and the patient suddenly reports chest pain and shortness of breath. The technician's FIRST action should be to:

  1. Place the patient upright in a sitting position to ease breathing
  2. Clamp the venous bloodline and stop the blood pump
  3. Increase the blood flow rate to clear the air from the circuit
  4. Return the remaining blood and discontinue the treatment
Show answer & explanation

Correct answer: B - Clamp the venous bloodline and stop the blood pump

Question 2

Before initiating treatment, a technician cannot palpate a thrill or auscultate a bruit over a patient's AV fistula. The MOST appropriate action is to:

  1. Cannulate using a smaller-gauge needle to improve flow
  2. Apply a warm compress and attempt cannulation shortly after
  3. Document the access as normal and begin the treatment
  4. Notify the nurse that the access may be clotted
Show answer & explanation

Correct answer: D - Notify the nurse that the access may be clotted

Question 3

A patient's pre-dialysis BUN is 80 mg/dL and the post-dialysis BUN is 24 mg/dL. What is the urea reduction ratio (URR)?

  1. 56%
  2. 70%
  3. 30%
  4. 65%
Show answer & explanation

Correct answer: B - 70%

Question 4

Thirty minutes into treatment a patient becomes diaphoretic and lightheaded, and the blood pressure has dropped sharply. Which set of interventions is MOST appropriate?

  1. Raise the head of the chair and increase fluid removal
  2. Increase the blood flow rate and continue as ordered
  3. Lower the head, slow fluid removal, and give saline per protocol
  4. Stop the treatment at once and return all of the patient's blood
Show answer & explanation

Correct answer: C - Lower the head, slow fluid removal, and give saline per protocol

Domain 2: Machine Technology 12% of exam

Question 5

The conductivity reading on a hemodialysis machine is used to verify that the:

  1. Concentrate and water are mixed in the correct proportion
  2. Dialysate temperature is within a safe range
  3. Dialyzer membrane is intact and free of blood leaks
  4. Blood and dialysate are flowing in opposite directions
Show answer & explanation

Correct answer: A - Concentrate and water are mixed in the correct proportion

Domain 3: Water Treatment 15% of exam

Question 6

According to AAMI standards, the chloramine level in water used to prepare dialysate must NOT exceed:

  1. 0.1 mg/L
  2. 0.5 mg/L
  3. 1.0 mg/L
  4. 2.0 mg/L
Show answer & explanation

Correct answer: A - 0.1 mg/L

Question 7

A facility's carbon adsorption tanks fail to remove chloramine from the incoming water supply. Which patient complication is MOST likely to result?

  1. Hemolytic anemia
  2. Hypercalcemia
  3. Hyperkalemia
  4. Air embolism
Show answer & explanation

Correct answer: A - Hemolytic anemia

Domain 4: Infection Control 18% of exam

Question 8

A patient newly tests positive for hepatitis B surface antigen (HBsAg). Which infection-control measure is REQUIRED for this patient but is NOT required for a patient who is hepatitis C positive?

  1. Use of standard precautions throughout the entire treatment
  2. Disinfection of the dialysis station after the treatment ends
  3. Treatment in a separate room with a dedicated machine and staff
  4. Wearing gloves and a gown for all cannulation procedures
Show answer & explanation

Correct answer: C - Treatment in a separate room with a dedicated machine and staff

Question 9

According to dialysis-specific infection-control precautions, medications for individual patients should be:

  1. Drawn up individually at each patient's dialysis station
  2. Transported between stations on a shared medication cart
  3. Pre-drawn for all patients and kept at the nurses' station
  4. Prepared in a centralized clean area away from stations
Show answer & explanation

Correct answer: D - Prepared in a centralized clean area away from stations

Domain 5: Education and Professional Development 10% of exam

Question 10

A hemodialysis patient asks the technician to explain what their latest lab results mean for their care. According to scope of practice, the technician should:

  1. Interpret the results, since the technician drew the samples
  2. Tell the patient the results appear to be within normal limits
  3. Adjust the treatment based on the results and inform the patient
  4. Refer the patient to the nurse or physician
Show answer & explanation

Correct answer: D - Refer the patient to the nurse or physician

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