NWCA-Phlebotomy Technician
Credential Exam Review EXAM
QUESTIONS VERIFIED ANSWERS
LATEST UPDATE 2025/2026 RATED A+
Which of the following veins is most commonly used for venipuncture?
a. Median cubital
b. Femoral
c. Great saphenous
d. Brachial - CORRECT ANSWERS a.
_____________ additive is found in a royal blue-topped blood collection tube while a yellow-topped
blood collection tube has _______ additive.
a. Clot activator; sodium polyanetholesulfonate
b. Ammonium heparin; trisodium citrate
c. Lithium heparin; EDTA
d. Sodium citrate; lithium heparin - CORRECT ANSWERS a.
The ___________ is most appropriate for blood bank collections while the ____ is most appropriate for
the collection of blood for a DIFF.
,a. Royal blue-topped tube; purple-topped tube
b. Light blue-topped tube; royal blue-topped tube
c. Gold-topped tube; light blue-topped tube
d. Pink-topped tube; purple-topped tube - CORRECT ANSWERS d.
When using the syringe method to collect a blood specimen, how is the blood added into additive and
non-additive tubes?
a. The needle is removed from the syringe, the caps are removed from the tubes, and blood is pushed
into each tube, then re-stoppered and mixed.
b. The syringe needle is used to puncture the cap of each tube, then blood is pushed into each tube
c. Using a clean needle, puncture all tubes to release the vacuum, then remove the caps and gently fill
each tube.
d. Using a syringe transfer device attached to the syringe, insert each tube into the device and allow the
blood to flow freely. - CORRECT ANSWERS d.
What is the average skin puncture depth appropriate for an adult during a blood collection procedure?
a. 0.5 to 1.0 mm
b. 2-3 mm
c. 3-5 mm
d. 5.5 mm - CORRECT ANSWERS b.
Assays that require a chilled specimen include __________.
, a. Glucose, cholesterol, and prostatic specific antigen
b. Tests for electrolytes
c. All hematology tests
d. Gastrin, ammonia, catecholamine, and lactic acid - CORRECT ANSWERS d.
"CSF" is a specimen originating from ___________.
a. Venous blood
b. Arterial blood
c. Joints
d. The spinal column - CORRECT ANSWERS d.
What is a commonly used intravenous device that is sometimes used in the collection of blood from
patients who are difficult to collect blood by conventional methods?
a. BD microtainer
b. BD Unopette
c. Butterfly needle or winged infusion set
d. Seraket - CORRECT ANSWERS c.
The color coding for needles indicates the ______.
Credential Exam Review EXAM
QUESTIONS VERIFIED ANSWERS
LATEST UPDATE 2025/2026 RATED A+
Which of the following veins is most commonly used for venipuncture?
a. Median cubital
b. Femoral
c. Great saphenous
d. Brachial - CORRECT ANSWERS a.
_____________ additive is found in a royal blue-topped blood collection tube while a yellow-topped
blood collection tube has _______ additive.
a. Clot activator; sodium polyanetholesulfonate
b. Ammonium heparin; trisodium citrate
c. Lithium heparin; EDTA
d. Sodium citrate; lithium heparin - CORRECT ANSWERS a.
The ___________ is most appropriate for blood bank collections while the ____ is most appropriate for
the collection of blood for a DIFF.
,a. Royal blue-topped tube; purple-topped tube
b. Light blue-topped tube; royal blue-topped tube
c. Gold-topped tube; light blue-topped tube
d. Pink-topped tube; purple-topped tube - CORRECT ANSWERS d.
When using the syringe method to collect a blood specimen, how is the blood added into additive and
non-additive tubes?
a. The needle is removed from the syringe, the caps are removed from the tubes, and blood is pushed
into each tube, then re-stoppered and mixed.
b. The syringe needle is used to puncture the cap of each tube, then blood is pushed into each tube
c. Using a clean needle, puncture all tubes to release the vacuum, then remove the caps and gently fill
each tube.
d. Using a syringe transfer device attached to the syringe, insert each tube into the device and allow the
blood to flow freely. - CORRECT ANSWERS d.
What is the average skin puncture depth appropriate for an adult during a blood collection procedure?
a. 0.5 to 1.0 mm
b. 2-3 mm
c. 3-5 mm
d. 5.5 mm - CORRECT ANSWERS b.
Assays that require a chilled specimen include __________.
, a. Glucose, cholesterol, and prostatic specific antigen
b. Tests for electrolytes
c. All hematology tests
d. Gastrin, ammonia, catecholamine, and lactic acid - CORRECT ANSWERS d.
"CSF" is a specimen originating from ___________.
a. Venous blood
b. Arterial blood
c. Joints
d. The spinal column - CORRECT ANSWERS d.
What is a commonly used intravenous device that is sometimes used in the collection of blood from
patients who are difficult to collect blood by conventional methods?
a. BD microtainer
b. BD Unopette
c. Butterfly needle or winged infusion set
d. Seraket - CORRECT ANSWERS c.
The color coding for needles indicates the ______.
