Phlebotomy Technician Certification Exam Prep 2026 | Complete Study Guide for National Phlebotomy Certification Exams | Venipuncture & Capillary Collection Techniques, Specimen Handling, Infection Control, Patient Identification, Order of Draw, Laboratory

• Phlebotomy Technician Certification Exam Prep 2026 | Complete
Study Guide for National Phlebotomy Certification Exams |
Venipuncture & Capillary Collection Techniques, Specimen Handling,
Infection Control, Patient Identification, Order of Draw, Laboratory
Safety, and Quality Assurance | High-Yield Practice Questions with
Clear Rationales to Pass Phlebotomy Technician Exams
•

Question 1:
What is the primary purpose of phlebotomy?
• A) To administer medications
• B) To collect blood samples
• C) To perform blood transfusions
• D) To test urine samples
Correct Option: B
Rationale: The primary purpose of phlebotomy is to collect blood samples for
laboratory analysis, which can help diagnose diseases and monitor health conditions.


Question 2:
Which of the following is the most common site for venipuncture?
• A) Median cubital vein
• B) Radial artery
• C) Cephalic vein
• D) Dorsal hand vein
Correct Option: A
Rationale: The median cubital vein is the most commonly used site for venipuncture
due to its accessibility and the lower risk of complications, making it ideal for blood
collection.


Question 3:
What is the role of an anticoagulant in blood collection tubes?
• A) To preserve the specimen
• B) To prevent clotting

, • C) To enhance cell lysis
• D) To stabilize glucose levels
Correct Option: B
Rationale: Anticoagulants are added to blood collection tubes to prevent clotting,
allowing for accurate laboratory testing of various blood components.


Question 4:
Which gauge needle is typically used for adult venipuncture?
• A) 20 gauge
• B) 24 gauge
• C) 21 gauge
• D) 18 gauge
Correct Option: C
Rationale: A 21-gauge needle is commonly used for adult venipuncture, providing a
good balance between blood flow rate and patient comfort.


Question 5:
What is the appropriate order of draw for blood collection tubes?
• A) Red, Green, Lavender, Blue
• B) Lavender, Blue, Green, Red
• C) Green, Blue, Red, Lavender
• D) Blue, Red, Green, Lavender
Correct Option: D
Rationale: The order of draw is essential in phlebotomy to prevent cross-contamination
of additives between tubes, which could affect test results. The proper sequence
ensures the integrity of each sample.


Question 6:
What is the purpose of the tourniquet in phlebotomy?
• A) To engorge the veins for easier access
• B) To prevent bleeding after venipuncture
• C) To stabilize the needle

, • D) To clean the puncture site
Correct Option: A
Rationale: A tourniquet is used to engorge the veins, making them more prominent and
easier to access during venipuncture, thereby facilitating a smoother blood draw.


Question 7:
Which of the following is a common complication of venipuncture?
• A) Anemia
• B) Hematoma
• C) Hypertension
• D) Thrombosis
Correct Option: B
Rationale: A hematoma, which is a localized collection of blood outside of blood
vessels, is a common complication of venipuncture due to the accidental puncture of a
blood vessel or inadequate pressure applied post-collection.
Question 8:
What is the typical volume of blood collected in a standard vacuum tube for routine
testing?
• A) 1 mL
• B) 5 mL
• C) 15 mL
• D) 50 mL
Correct Option: B
Rationale: The typical volume collected in a standard vacuum tube for routine testing is
5 mL, which provides enough sample for various analyses while minimizing patient
discomfort.


Question 9:
Which of the following tubes is used for hematology tests?
• A) Red tube
• B) Green tube
• C) Lavender tube