Phlebotomy Technician Certification Exam
2026–2027: 200 Practice Questions with
Verified Answers & Detailed Rationales
Guaranteed Pass!
Introduction
Welcome to this Phlebotomy Technician Certification Exam practice test. This resource contains 200
questions modeled after the content of national certification exams such as the NHA Certified
Phlebotomy Technician (CPT), ASCP Phlebotomy Technician (PBT), AMT Registered Phlebotomy
Technician (RPT), and NCCT National Certified Phlebotomy Technician (NCPT).
Phlebotomy Technician Certification Exam: 200 Practice Questions
1. What is the first step in any blood collection procedure?
A. Apply the tourniquet
B. Palpate for a vein
C. Clean the puncture site
D. Identify the patient
Rationale: Patient identification is the most critical first step to avoid mislabeled specimens and
transfusion errors. Follow your facility’s protocol (e.g., two identifiers).
,2. Which needle gauge is most commonly used for routine adult venipuncture?
A. 21 gauge
B. 25 gauge
C. 18 gauge
D. 23 gauge
Rationale: 21G is the standard for most adult draws, balancing flow rate and patient comfort. 23G is
often used for small or fragile veins; 18G is for blood donation.
3. What does the light blue top tube contain?
A. EDTA
B. Sodium citrate
C. Heparin
D. No additive
Rationale: Light blue tubes contain sodium citrate, which binds calcium to preserve coagulation
factors for PT/INR and PTT tests.
4. During a venipuncture, you feel a sudden “pop” and see a hematoma forming. What likely
happened?
A. Needle is too shallow
B. Needle went through the vein
C. Tourniquet was too loose
D. Tube expired
Rationale: A “pop” followed by rapid hematoma usually indicates the needle pierced both walls of the
vein (through-and-through). Blood leaks into tissue.
5. Which of the following tubes must be filled completely?
A. Red top
B. Light blue top
C. Green top
D. Lavender top
Rationale: Light blue tubes require a full draw to maintain the correct 9:1 blood-to-citrate ratio;
underfilling yields inaccurate coagulation results.
,6. What is the maximum recommended time a tourniquet should remain on before release?
A. 30 seconds
B. 1 minute
C. 3 minutes
D. 5 minutes
Rationale: Prolonged tourniquet application (>1 minute) causes hemoconcentration and altered
analyte levels (e.g., potassium, LDH).
7. The additive in a lavender top tube is:
A. Sodium polyanethol sulfonate (SPS)
B. Lithium heparin
C. EDTA
D. Clot activator
Rationale: EDTA (ethylenediaminetetraacetic acid) chelates calcium, preserving blood cells for
hematology tests like CBC.
8. Which vein is the FIRST choice for routine venipuncture?
A. Basilic vein
B. Median cubital vein
C. Cephalic vein
D. Dorsal metacarpal vein
Rationale: The median cubital is large, stable, and less painful because it has fewer nerve endings. It is
also less mobile.
9. After removing the needle, you should:
A. Bend the needle to recap it
B. Activate the safety device and dispose in sharps container
C. Remove the needle by hand
D. Place the needle on the patient’s bedside table
Rationale: OSHA requires immediate activation of needle safety devices and disposal in a sharps
container. Never recap or bend needles.
10. Which condition would disqualify a site for venipuncture?
A. Patient is dehydrated
, B. Vein feels springy
C. Patient has a fistula
D. Above an IV line in the same arm
Rationale: Drawing above an IV infusion can contaminate the sample with IV fluid. Use the opposite
arm or below the IV after pausing the infusion.
11. What does PST stand for?
A. Patient specimen tube
B. Plasma separation tube
C. Phlebotomy safety technique
D. Primary specimen transport
Rationale: PST (plasma separation tube) contains lithium heparin and a gel barrier; used for plasma
chemistry tests.
12. Which tube should be drawn first when using a winged infusion set (butterfly) with a discard tube?
A. Light blue
B. Red
C. Discard tube (clear or plain)
D. Lavender
Rationale: A discard tube (non-additive) removes air from the butterfly tubing, ensuring accurate fill of
the light blue tube for coagulation testing.
13. The correct order of draw for a capillary puncture is different from venipuncture. Blood smears
should be made:
A. First
B. After lavender tubes
C. Last
D. Before EDTA tubes only
Rationale: For capillary punctures, blood smears are made first (using the first drop if no alcohol
interference) to avoid platelet clumping and EDTA artifacts.
14. Which of the following is an example of a CLIA-waived test?
A. Glucose by glucometer
B. Complete blood count
2026–2027: 200 Practice Questions with
Verified Answers & Detailed Rationales
Guaranteed Pass!
Introduction
Welcome to this Phlebotomy Technician Certification Exam practice test. This resource contains 200
questions modeled after the content of national certification exams such as the NHA Certified
Phlebotomy Technician (CPT), ASCP Phlebotomy Technician (PBT), AMT Registered Phlebotomy
Technician (RPT), and NCCT National Certified Phlebotomy Technician (NCPT).
Phlebotomy Technician Certification Exam: 200 Practice Questions
1. What is the first step in any blood collection procedure?
A. Apply the tourniquet
B. Palpate for a vein
C. Clean the puncture site
D. Identify the patient
Rationale: Patient identification is the most critical first step to avoid mislabeled specimens and
transfusion errors. Follow your facility’s protocol (e.g., two identifiers).
,2. Which needle gauge is most commonly used for routine adult venipuncture?
A. 21 gauge
B. 25 gauge
C. 18 gauge
D. 23 gauge
Rationale: 21G is the standard for most adult draws, balancing flow rate and patient comfort. 23G is
often used for small or fragile veins; 18G is for blood donation.
3. What does the light blue top tube contain?
A. EDTA
B. Sodium citrate
C. Heparin
D. No additive
Rationale: Light blue tubes contain sodium citrate, which binds calcium to preserve coagulation
factors for PT/INR and PTT tests.
4. During a venipuncture, you feel a sudden “pop” and see a hematoma forming. What likely
happened?
A. Needle is too shallow
B. Needle went through the vein
C. Tourniquet was too loose
D. Tube expired
Rationale: A “pop” followed by rapid hematoma usually indicates the needle pierced both walls of the
vein (through-and-through). Blood leaks into tissue.
5. Which of the following tubes must be filled completely?
A. Red top
B. Light blue top
C. Green top
D. Lavender top
Rationale: Light blue tubes require a full draw to maintain the correct 9:1 blood-to-citrate ratio;
underfilling yields inaccurate coagulation results.
,6. What is the maximum recommended time a tourniquet should remain on before release?
A. 30 seconds
B. 1 minute
C. 3 minutes
D. 5 minutes
Rationale: Prolonged tourniquet application (>1 minute) causes hemoconcentration and altered
analyte levels (e.g., potassium, LDH).
7. The additive in a lavender top tube is:
A. Sodium polyanethol sulfonate (SPS)
B. Lithium heparin
C. EDTA
D. Clot activator
Rationale: EDTA (ethylenediaminetetraacetic acid) chelates calcium, preserving blood cells for
hematology tests like CBC.
8. Which vein is the FIRST choice for routine venipuncture?
A. Basilic vein
B. Median cubital vein
C. Cephalic vein
D. Dorsal metacarpal vein
Rationale: The median cubital is large, stable, and less painful because it has fewer nerve endings. It is
also less mobile.
9. After removing the needle, you should:
A. Bend the needle to recap it
B. Activate the safety device and dispose in sharps container
C. Remove the needle by hand
D. Place the needle on the patient’s bedside table
Rationale: OSHA requires immediate activation of needle safety devices and disposal in a sharps
container. Never recap or bend needles.
10. Which condition would disqualify a site for venipuncture?
A. Patient is dehydrated
, B. Vein feels springy
C. Patient has a fistula
D. Above an IV line in the same arm
Rationale: Drawing above an IV infusion can contaminate the sample with IV fluid. Use the opposite
arm or below the IV after pausing the infusion.
11. What does PST stand for?
A. Patient specimen tube
B. Plasma separation tube
C. Phlebotomy safety technique
D. Primary specimen transport
Rationale: PST (plasma separation tube) contains lithium heparin and a gel barrier; used for plasma
chemistry tests.
12. Which tube should be drawn first when using a winged infusion set (butterfly) with a discard tube?
A. Light blue
B. Red
C. Discard tube (clear or plain)
D. Lavender
Rationale: A discard tube (non-additive) removes air from the butterfly tubing, ensuring accurate fill of
the light blue tube for coagulation testing.
13. The correct order of draw for a capillary puncture is different from venipuncture. Blood smears
should be made:
A. First
B. After lavender tubes
C. Last
D. Before EDTA tubes only
Rationale: For capillary punctures, blood smears are made first (using the first drop if no alcohol
interference) to avoid platelet clumping and EDTA artifacts.
14. Which of the following is an example of a CLIA-waived test?
A. Glucose by glucometer
B. Complete blood count
