NCCT Phlebotomy Certification Exam
2025/2026 Verified Questions and Answer
Complete Study Guide
Question 1
Which of the following is the most appropriate site for venipuncture in an adult patient with no visible
or palpable veins in the antecubital area?
A. Dorsal hand veins
B. Femoral vein
C. Jugular vein
D. Ankle veins
Correct Answerwer: A
Rationale: A: Correct, dorsal hand veins are the next recommended site when antecubital veins are
inaccessible. B: Incorrect, the femoral vein is deep, high-risk, and outside the phlebotomist's scope. C:
Incorrect, the jugular vein is a central vein used only in critical care by advanced providers. D: Incorrect,
lower extremity veins are avoided due to high risk of thrombosis and poor circulation.
Question 2
What is the primary purpose of using a tourniquet during venipuncture?
A. To sterilize the puncture site
B. To dilate the vein and make it more prominent
C. To prevent blood from flowing back into the heart
D. To reduce patient anxiety
Correct Answerwer: B
Rationale: A: Incorrect, sterilization is achieved with an antiseptic like 70% isopropyl alcohol. B: Correct,
the tourniquet temporarily restricts venous return, causing veins to engorge and become easier to
,access. C: Incorrect, while venous return is slowed, the main goal is to enhance vein visibility, not stop
flow. D: Incorrect, tourniquets are anatomical tools and do not reduce anxiety.
Question 3
According to OSHA regulations, which of the following must be done immediately after a needlestick
injury?
A. Document the incident in the patient’s chart
B. Wash the area with soap and water, then report the exposure
C. Apply alcohol to the site and continue working
D. Wait for symptoms before reporting
Correct Answerwer: B
Rationale: A: Incorrect, needlestick injuries are documented in an employee exposure log, not the
patient’s chart. B: Correct, OSHA requires immediate washing of the site followed by prompt reporting
to initiate post-exposure evaluation. C: Incorrect, alcohol does not eliminate viral pathogens from inside
tissues; washing and reporting are mandatory. D: Incorrect, delaying reporting compromises timely
prophylaxis, which is most effective when started immediately.
Question 4
Which additive is found in a light blue-top tube?
A. EDTA
B. Heparin
C. Sodium citrate
D. Potassium oxalate
Correct Answerwer: C
Rationale: A: Incorrect, EDTA is found in lavender/purple-top tubes for hematology tests. B: Incorrect,
heparin is in green-top tubes for chemistry tests requiring plasma. C: Correct, light blue-top tubes
contain sodium citrate, which binds calcium to prevent coagulation for coagulation studies. D: Incorrect,
potassium oxalate is often paired with sodium fluoride in gray-top tubes for glucose testing.
Question 5
What is the correct order of draw for evacuated tubes?
A. Red, lavender, green, light blue
B. Blood culture bottles, light blue, red, green, lavender
C. Lavender, green, red, light blue
D. Green, red, light blue, lavender
,Correct Answerwer: B
Rationale: A: Incorrect, drawing red before light blue can contaminate coagulation samples with clot
activator. B: Correct, the CLSI order is blood cultures, light blue, red/serum, green, lavender, and gray to
prevent additive carryover. C: Incorrect, drawing EDTA first would contaminate all subsequent tubes
with anticoagulant. D: Incorrect, light blue must precede serum tubes to prevent clot activator
interference.
Question 6
A patient refuses to have blood drawn. What should the phlebotomist do?
A. Proceed with the draw to ensure timely test results
B. Explain that the test is mandatory and they have no choice
C. Respect the refusal and notify the ordering provider
D. Ask a colleague to convince the patient
Correct Answerwer: C
Rationale: A: Incorrect, drawing blood against a patient’s will constitutes battery and violates autonomy.
B: Incorrect, most blood tests are not legally mandatory; patients have the right to refuse. C: Correct,
informed consent is required; the phlebotomist must document the refusal and notify the provider. D:
Incorrect, coercion undermines informed consent; education is acceptable, but pressure is unethical.
Question 7
Which of the following best describes hemolysis?
A. Clotting of blood in the collection tube
B. Breakdown of red blood cells releasing hemoglobin
C. Presence of lipids in the serum
D. Contamination with skin flora
Correct Answerwer: B
Rationale: A: Incorrect, clotting describes inadequate mixing or incorrect tube type, not hemolysis. B:
Correct, hemolysis occurs when RBCs rupture, releasing intracellular components that falsely elevate lab
results like potassium. C: Incorrect, the presence of lipids is called lipemia, which causes turbid serum. D:
Incorrect, contamination with skin flora leads to false-positive blood cultures.
Question 8
What is the recommended angle of needle insertion for routine venipuncture?
A. 5 to 10 degrees
B. 15 to 30 degrees
, C. 45 to 60 degrees
D. 90 degrees
Correct Answerwer: B
Rationale: A: Incorrect, a 5 to 10-degree angle is used for capillary punctures like fingersticks. B: Correct,
15 to 30 degrees allows smooth entry into the vein lumen while minimizing the risk of puncturing the
opposite wall. C: Incorrect, 45 to 60 degrees is too steep and increases the risk of vein damage and
hematoma. D: Incorrect, 90 degrees is perpendicular and almost guarantees piercing both walls of the
vein.
Question 9
Which patient identifier is acceptable for verifying patient identity before venipuncture?
A. Room number
B. Date of birth and full name
C. Bed number
D. Reason for visit
Correct Answerwer: B
Rationale: A: Incorrect, room numbers are not unique and can change. B: Correct, The Joint Commission
requires two unique identifiers, such as full name and date of birth. C: Incorrect, bed assignments are
not reliable identifiers. D: Incorrect, the reason for visit is clinical information, not a unique identifier.
Question 10
What is the primary reason for inverting a blood collection tube after filling?
A. To mix the blood with the additive
B. To remove air bubbles
C. To accelerate clotting
D. To label the tube properly
Correct Answerwer: A
Rationale: A: Correct, immediate and gentle inversion ensures even distribution of anticoagulants or clot
activators to prevent microclots. B: Incorrect, air bubbles do not affect most tests and are not removed
by inversion. C: Incorrect, only serum tubes contain clot activators, but the primary purpose across all
tubes is mixing. D: Incorrect, labeling should occur after the draw, but inversion has no role in the
labeling process.
Question 11
Which type of isolation precaution requires the use of an N95 respirator?
2025/2026 Verified Questions and Answer
Complete Study Guide
Question 1
Which of the following is the most appropriate site for venipuncture in an adult patient with no visible
or palpable veins in the antecubital area?
A. Dorsal hand veins
B. Femoral vein
C. Jugular vein
D. Ankle veins
Correct Answerwer: A
Rationale: A: Correct, dorsal hand veins are the next recommended site when antecubital veins are
inaccessible. B: Incorrect, the femoral vein is deep, high-risk, and outside the phlebotomist's scope. C:
Incorrect, the jugular vein is a central vein used only in critical care by advanced providers. D: Incorrect,
lower extremity veins are avoided due to high risk of thrombosis and poor circulation.
Question 2
What is the primary purpose of using a tourniquet during venipuncture?
A. To sterilize the puncture site
B. To dilate the vein and make it more prominent
C. To prevent blood from flowing back into the heart
D. To reduce patient anxiety
Correct Answerwer: B
Rationale: A: Incorrect, sterilization is achieved with an antiseptic like 70% isopropyl alcohol. B: Correct,
the tourniquet temporarily restricts venous return, causing veins to engorge and become easier to
,access. C: Incorrect, while venous return is slowed, the main goal is to enhance vein visibility, not stop
flow. D: Incorrect, tourniquets are anatomical tools and do not reduce anxiety.
Question 3
According to OSHA regulations, which of the following must be done immediately after a needlestick
injury?
A. Document the incident in the patient’s chart
B. Wash the area with soap and water, then report the exposure
C. Apply alcohol to the site and continue working
D. Wait for symptoms before reporting
Correct Answerwer: B
Rationale: A: Incorrect, needlestick injuries are documented in an employee exposure log, not the
patient’s chart. B: Correct, OSHA requires immediate washing of the site followed by prompt reporting
to initiate post-exposure evaluation. C: Incorrect, alcohol does not eliminate viral pathogens from inside
tissues; washing and reporting are mandatory. D: Incorrect, delaying reporting compromises timely
prophylaxis, which is most effective when started immediately.
Question 4
Which additive is found in a light blue-top tube?
A. EDTA
B. Heparin
C. Sodium citrate
D. Potassium oxalate
Correct Answerwer: C
Rationale: A: Incorrect, EDTA is found in lavender/purple-top tubes for hematology tests. B: Incorrect,
heparin is in green-top tubes for chemistry tests requiring plasma. C: Correct, light blue-top tubes
contain sodium citrate, which binds calcium to prevent coagulation for coagulation studies. D: Incorrect,
potassium oxalate is often paired with sodium fluoride in gray-top tubes for glucose testing.
Question 5
What is the correct order of draw for evacuated tubes?
A. Red, lavender, green, light blue
B. Blood culture bottles, light blue, red, green, lavender
C. Lavender, green, red, light blue
D. Green, red, light blue, lavender
,Correct Answerwer: B
Rationale: A: Incorrect, drawing red before light blue can contaminate coagulation samples with clot
activator. B: Correct, the CLSI order is blood cultures, light blue, red/serum, green, lavender, and gray to
prevent additive carryover. C: Incorrect, drawing EDTA first would contaminate all subsequent tubes
with anticoagulant. D: Incorrect, light blue must precede serum tubes to prevent clot activator
interference.
Question 6
A patient refuses to have blood drawn. What should the phlebotomist do?
A. Proceed with the draw to ensure timely test results
B. Explain that the test is mandatory and they have no choice
C. Respect the refusal and notify the ordering provider
D. Ask a colleague to convince the patient
Correct Answerwer: C
Rationale: A: Incorrect, drawing blood against a patient’s will constitutes battery and violates autonomy.
B: Incorrect, most blood tests are not legally mandatory; patients have the right to refuse. C: Correct,
informed consent is required; the phlebotomist must document the refusal and notify the provider. D:
Incorrect, coercion undermines informed consent; education is acceptable, but pressure is unethical.
Question 7
Which of the following best describes hemolysis?
A. Clotting of blood in the collection tube
B. Breakdown of red blood cells releasing hemoglobin
C. Presence of lipids in the serum
D. Contamination with skin flora
Correct Answerwer: B
Rationale: A: Incorrect, clotting describes inadequate mixing or incorrect tube type, not hemolysis. B:
Correct, hemolysis occurs when RBCs rupture, releasing intracellular components that falsely elevate lab
results like potassium. C: Incorrect, the presence of lipids is called lipemia, which causes turbid serum. D:
Incorrect, contamination with skin flora leads to false-positive blood cultures.
Question 8
What is the recommended angle of needle insertion for routine venipuncture?
A. 5 to 10 degrees
B. 15 to 30 degrees
, C. 45 to 60 degrees
D. 90 degrees
Correct Answerwer: B
Rationale: A: Incorrect, a 5 to 10-degree angle is used for capillary punctures like fingersticks. B: Correct,
15 to 30 degrees allows smooth entry into the vein lumen while minimizing the risk of puncturing the
opposite wall. C: Incorrect, 45 to 60 degrees is too steep and increases the risk of vein damage and
hematoma. D: Incorrect, 90 degrees is perpendicular and almost guarantees piercing both walls of the
vein.
Question 9
Which patient identifier is acceptable for verifying patient identity before venipuncture?
A. Room number
B. Date of birth and full name
C. Bed number
D. Reason for visit
Correct Answerwer: B
Rationale: A: Incorrect, room numbers are not unique and can change. B: Correct, The Joint Commission
requires two unique identifiers, such as full name and date of birth. C: Incorrect, bed assignments are
not reliable identifiers. D: Incorrect, the reason for visit is clinical information, not a unique identifier.
Question 10
What is the primary reason for inverting a blood collection tube after filling?
A. To mix the blood with the additive
B. To remove air bubbles
C. To accelerate clotting
D. To label the tube properly
Correct Answerwer: A
Rationale: A: Correct, immediate and gentle inversion ensures even distribution of anticoagulants or clot
activators to prevent microclots. B: Incorrect, air bubbles do not affect most tests and are not removed
by inversion. C: Incorrect, only serum tubes contain clot activators, but the primary purpose across all
tubes is mixing. D: Incorrect, labeling should occur after the draw, but inversion has no role in the
labeling process.
Question 11
Which type of isolation precaution requires the use of an N95 respirator?
