Free National Certified Phlebotomy Technician (NCPT) Practice Questions

Sample Practice Questions

Try these 10 sample questions from the National Certified Phlebotomy Technician (NCPT) practice bank. Each includes the answer and explanation. Continue with the interactive practice above to review the full question set.

1. 1After completing a venipuncture, a technician removes both examination gloves. When should handwashing occur?

   1. A.Immediately or as soon as feasibleCorrect answer: A
   2. B.After the next collection is completed
   3. C.When the collection tray is restocked
   4. D.At the end of the collection round

   Explanation: OSHA states, "Employers shall ensure that employees wash their hands immediately or as soon as feasible after removal of gloves or other personal protective equipment." Removing gloves does not replace handwashing; the required timing is immediately or as soon as feasible.

   Reference: OSHA Bloodborne Pathogens Standard — 29 CFR 1910.1030(d)(2)(v)

2. 2Before collection, a technician sees foreign material inside an unused evacuated tube. What should the technician do?

   1. A.Use the tube after an additional inversion
   2. B.Select an acceptable replacement tubeCorrect answer: B
   3. C.Remove the material with sterile forceps
   4. D.Rinse the tube and restore its cap

   Explanation: The source states, "Do not use tubes if foreign matter is present!" Visible foreign matter makes the tube unacceptable; rinsing or manipulating its contents does not restore a validated collection device.

   Reference: Greiner Bio-One Evacuated Blood Collection System Instructions for Use — p. 3, Precautions/Cautions

3. 3During venipuncture, where should the technician place the anchoring thumb relative to the entry site?

   1. A.Directly over the cleaned entry point
   2. B.Above the entry point along the needle path
   3. C.Below the entry point on the patient's armCorrect answer: C
   4. D.Across the exposed shaft of the needle

   Explanation: The source states, "Anchor the vein by holding the patient’s arm and placing a thumb BELOW the venepuncture site." Anchoring below the site stabilizes the vein without touching the prepared entry point or entering the needle path.

   Reference: WHO Guidelines on Drawing Blood: Best Practices in Phlebotomy — section 2.2.3, Step 6, p. 15

4. 4A centrifuged specimen has a pink-red supernatant because red cells were damaged during collection. Which substance escaped from the cells?

   1. A.Fibrinogen
   2. B.Albumin
   3. C.HemoglobinCorrect answer: C
   4. D.Sodium citrate

   Explanation: The source states, "Hemolysis occurs when the thin protective membrane that encases the fragile red cells is ruptured, allowing hemoglobin to escape into the plasma." Ruptured erythrocytes release hemoglobin into plasma; the other listed substances do not explain the red discoloration from hemolysis.

   Reference: Labcorp Blood Specimens: Chemistry and Hematology — Blood Components, Hemolysis

5. 5A competent adult refuses an elective blood draw before needle insertion, despite an existing test order. What should the technician do?

   1. A.Treat the signed order as permission to proceed
   2. B.Ask another collector to proceed without discussion
   3. C.Respect the refusal and follow the reporting procedureCorrect answer: C
   4. D.Collect a smaller sample without further permission

   Explanation: The source states, "The patient has a right to refuse a test at any time before the blood sampling, so it is important to ensure that the patient has understood the procedure." An elective order does not override a competent patient's refusal; the refusal is respected and communicated appropriately.

   Reference: WHO Guidelines on Drawing Blood: Best Practices in Phlebotomy — section 2.2.3, Step 2, p. 13

6. 6Blood splashes into a technician's eye while a collection tube is being handled. Which immediate first-aid measure is appropriate?

   1. A.Wipe the eye with an alcohol pad
   2. B.Flush the eye with clean waterCorrect answer: B
   3. C.Wash the eye with liquid hand soap
   4. D.Apply a skin antiseptic to the eye

   Explanation: OSHA states, "Employers shall ensure that employees wash hands and any other skin with soap and water, or flush mucous membranes with water immediately or as soon as feasible following contact of such body areas with blood or other potentially infectious materials." The eye is a mucous membrane, so water flushing applies; skin cleansing agents are inappropriate for the eye.

   Reference: OSHA Bloodborne Pathogens Standard — 29 CFR 1910.1030(d)(2)(vi)

7. 7A sealed blood collection tube is one week beyond its printed expiration date. Which decision follows its manufacturer's instructions?

   1. A.Use it if the tube still draws blood
   2. B.Use it if the additive remains clear
   3. C.Replace it with an unexpired tubeCorrect answer: C
   4. D.Use it if its cap has not been opened

   Explanation: The source states, "Do not use tubes after their expiration date." An intact cap, apparent vacuum or clear additive does not override the expiration restriction.

   Reference: Greiner Bio-One Evacuated Blood Collection System Instructions for Use — p. 3, Precautions/Cautions

8. 8According to WHO's adult venipuncture technique, what is the maximum recommended initial needle-entry angle?

   1. A.10 degrees
   2. B.15 degrees
   3. C.20 degrees
   4. D.30 degreesCorrect answer: D

   Explanation: The source states, "Enter the vein swiftly at a 30 degree angle or less, and continue to introduce the needle along the vein at the easiest angle of entry." Thirty degrees is the stated upper limit; the smaller angles may be acceptable but are not the maximum asked for.

   Reference: WHO Guidelines on Drawing Blood: Best Practices in Phlebotomy — section 2.2.3, Step 6, p. 15

9. 9A technician vigorously shakes a newly filled tube to mix its additive. Which specimen problem can result?

   1. A.Lipemia
   2. B.Icterus
   3. C.Platelet satellitism
   4. D.HemolysisCorrect answer: D

   Explanation: The source states, "Do not shake the tubes. Vigorous mixing may cause foaming or haemolysis." Vigorous shaking can cause hemolysis. Lipemia, icterus and platelet satellitism are real laboratory findings with different causes, not the stated mechanical mixing consequence.

   Reference: Greiner Bio-One Evacuated Blood Collection System Instructions for Use — p. 5, Venipuncture Technique mixing note

10. 10When should the technician explain an elective blood-sampling procedure and obtain the competent patient's consent?

    1. A.After inserting the collection needle
    2. B.After filling the first specimen tube
    3. C.After labeling all collected specimens
    4. D.Before starting the blood samplingCorrect answer: D

    Explanation: The source states, "Discuss the test to be performed (see Annex F) and obtain verbal consent." The explanation and consent belong to preparation before sampling, allowing the patient to understand and decide. Needle insertion, filling and labeling occur too late.

    Reference: WHO Guidelines on Drawing Blood: Best Practices in Phlebotomy — section 2.2.3, Step 2, p. 13