Phlebotomy Technician Certification
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Rationales 2026 Q&A Instant Download
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1. The primary purpose of phlebotomy is to:
A. Administer medications
B. Perform diagnostic imaging
C. Collect blood specimens
D. Measure blood pressure
Rationale: Phlebotomy focuses on safely collecting blood samples for
testing.
2. The most commonly used vein for venipuncture is the:
A. Basilic vein
B. Cephalic vein
C. Median cubital vein
D. Dorsal hand vein
Rationale: The median cubital vein is large, stable, and less painful to
access.
3. Which angle is recommended for routine venipuncture needle insertion?
A. 5–10 degrees
B. 15–30 degrees
C. 45–60 degrees
D. 90 degrees
Rationale: A 15–30° angle reduces risk of passing through the vein.
,4. The color of the tube used for complete blood count (CBC) testing is:
A. Red
B. Green
C. Blue
D. Lavender
Rationale: Lavender tubes contain EDTA, the anticoagulant used for CBC
tests.
5. The primary function of an anticoagulant in a blood collection tube is to:
A. Kill bacteria
B. Prevent clotting
C. Separate plasma
D. Increase oxygen content
Rationale: Anticoagulants stop the clotting process so whole blood can be
tested.
6. Which patient position is safest during a venipuncture?
A. Standing
B. Sitting on the edge of a chair
C. Seated with arm supported
D. Lying flat without support
Rationale: A supported arm reduces movement and fainting risk.
7. The tourniquet should not be left on the patient’s arm longer than:
A. 30 seconds
B. 1 minute
C. 1 minute
D. 5 minutes
Rationale: Leaving a tourniquet on too long can cause
hemoconcentration.
8. Which antiseptic is most commonly used for routine venipuncture?
A. Hydrogen peroxide
B. Betadine
C. Soap and water
, D. 70% isopropyl alcohol
Rationale: Alcohol effectively disinfects the site and dries quickly.
9. When collecting blood cultures, the skin should be cleansed using:
A. Mild soap
B. Alcohol only
C. Iodine or chlorhexidine prep
D. Sterile water
Rationale: Stronger antiseptics reduce skin flora contamination.
10.The correct order of draw for evacuated tubes starts with:
A. Lavender
B. Red
C. Blood culture bottles
D. Green
Rationale: Blood cultures are collected first to avoid contamination.
11.A fainting reaction during blood collection is called:
A. Shock
B. Hematoma
C. Syncope
D. Hemolysis
Rationale: Syncope is temporary loss of consciousness due to reduced
blood flow to the brain.
12.Which tube contains sodium citrate?
A. Lavender
B. Light blue
C. Green
D. Gray
Rationale: Light blue tubes use sodium citrate for coagulation tests.
13.The additive in a green-top tube is:
A. EDTA
B. Sodium citrate
Practice Exam Question And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A Instant Download
1. The primary purpose of phlebotomy is to:
A. Administer medications
B. Perform diagnostic imaging
C. Collect blood specimens
D. Measure blood pressure
Rationale: Phlebotomy focuses on safely collecting blood samples for
testing.
2. The most commonly used vein for venipuncture is the:
A. Basilic vein
B. Cephalic vein
C. Median cubital vein
D. Dorsal hand vein
Rationale: The median cubital vein is large, stable, and less painful to
access.
3. Which angle is recommended for routine venipuncture needle insertion?
A. 5–10 degrees
B. 15–30 degrees
C. 45–60 degrees
D. 90 degrees
Rationale: A 15–30° angle reduces risk of passing through the vein.
,4. The color of the tube used for complete blood count (CBC) testing is:
A. Red
B. Green
C. Blue
D. Lavender
Rationale: Lavender tubes contain EDTA, the anticoagulant used for CBC
tests.
5. The primary function of an anticoagulant in a blood collection tube is to:
A. Kill bacteria
B. Prevent clotting
C. Separate plasma
D. Increase oxygen content
Rationale: Anticoagulants stop the clotting process so whole blood can be
tested.
6. Which patient position is safest during a venipuncture?
A. Standing
B. Sitting on the edge of a chair
C. Seated with arm supported
D. Lying flat without support
Rationale: A supported arm reduces movement and fainting risk.
7. The tourniquet should not be left on the patient’s arm longer than:
A. 30 seconds
B. 1 minute
C. 1 minute
D. 5 minutes
Rationale: Leaving a tourniquet on too long can cause
hemoconcentration.
8. Which antiseptic is most commonly used for routine venipuncture?
A. Hydrogen peroxide
B. Betadine
C. Soap and water
, D. 70% isopropyl alcohol
Rationale: Alcohol effectively disinfects the site and dries quickly.
9. When collecting blood cultures, the skin should be cleansed using:
A. Mild soap
B. Alcohol only
C. Iodine or chlorhexidine prep
D. Sterile water
Rationale: Stronger antiseptics reduce skin flora contamination.
10.The correct order of draw for evacuated tubes starts with:
A. Lavender
B. Red
C. Blood culture bottles
D. Green
Rationale: Blood cultures are collected first to avoid contamination.
11.A fainting reaction during blood collection is called:
A. Shock
B. Hematoma
C. Syncope
D. Hemolysis
Rationale: Syncope is temporary loss of consciousness due to reduced
blood flow to the brain.
12.Which tube contains sodium citrate?
A. Lavender
B. Light blue
C. Green
D. Gray
Rationale: Light blue tubes use sodium citrate for coagulation tests.
13.The additive in a green-top tube is:
A. EDTA
B. Sodium citrate
