NWCA-Phlebotomy Technician Credential
Exam Review Questions + Verified
Answers 100% correct, Update 2026
Which of the following veins is most commonly used for
venipuncture?
a. Median cubital
b. Femoral
c. Great saphenous
d. Brachial -
correct answer ✅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 answer ✅a.
,NWCA-Phlebotomy Technician Credential
Exam Review Questions + Verified
Answers 100% correct, Update 2026
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 answer ✅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.
,NWCA-Phlebotomy Technician Credential
Exam Review Questions + Verified
Answers 100% correct, Update 2026
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 answer ✅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 answer ✅b.
Assays that require a chilled specimen include __________.
, NWCA-Phlebotomy Technician Credential
Exam Review Questions + Verified
Answers 100% correct, Update 2026
a. Glucose, cholesterol, and prostatic specific antigen
b. Tests for electrolytes
c. All hematology tests
d. Gastrin, ammonia, catecholamine, and lactic acid -
correct answer ✅d.
"CSF" is a specimen originating from ___________.
a. Venous blood
b. Arterial blood
c. Joints
d. The spinal column -
correct answer ✅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?
Exam Review Questions + Verified
Answers 100% correct, Update 2026
Which of the following veins is most commonly used for
venipuncture?
a. Median cubital
b. Femoral
c. Great saphenous
d. Brachial -
correct answer ✅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 answer ✅a.
,NWCA-Phlebotomy Technician Credential
Exam Review Questions + Verified
Answers 100% correct, Update 2026
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 answer ✅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.
,NWCA-Phlebotomy Technician Credential
Exam Review Questions + Verified
Answers 100% correct, Update 2026
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 answer ✅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 answer ✅b.
Assays that require a chilled specimen include __________.
, NWCA-Phlebotomy Technician Credential
Exam Review Questions + Verified
Answers 100% correct, Update 2026
a. Glucose, cholesterol, and prostatic specific antigen
b. Tests for electrolytes
c. All hematology tests
d. Gastrin, ammonia, catecholamine, and lactic acid -
correct answer ✅d.
"CSF" is a specimen originating from ___________.
a. Venous blood
b. Arterial blood
c. Joints
d. The spinal column -
correct answer ✅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?
