NHCO PHLEBOTOMY PRACTICE TEST
QUESTIONS AND CORRECT DETAILED
ANSWERS WITH RATIONALES ||
100% GUARANTEED PASS!!
<LATEST VERSION>
Question 1
Before performing a venipuncture, which action is most critical to prevent a
serious medical error?
A. Selecting the correct needle gauge
B. Verifying patient identity using two identifiers
C. Asking the patient about allergies
D. Applying the tourniquet correctly
Correct Answer: B
Rationale: Positive patient identification using at least two identifiers (e.g., full
name and date of birth) is the most important step to prevent specimen mix-ups
and medical errors.
Question 2
A patient reports feeling lightheaded immediately after tourniquet application.
What is the safest initial action?
A. Remove the tourniquet and continue the draw
B. Have the patient take deep breaths
C. Assist the patient into a supine position
D. Apply a cold compress
,Correct Answer: C
Rationale: Placing the patient in a supine position helps prevent syncope-related
injury and promotes cerebral blood flow.
Question 3
Which tube should be drawn immediately after blood cultures during a routine
venipuncture?
A. Red
B. Lavender
C. Light blue
D. Gray
Correct Answer: C
Rationale: Light blue tubes (sodium citrate) are drawn second to ensure accurate
coagulation testing and to avoid additive contamination.
Question 4
A phlebotomist palpates a vein that feels hard and cordlike. What is the appropriate
action?
A. Proceed with venipuncture
B. Use a butterfly needle
C. Apply a warm compress
D. Select another site
Correct Answer: D
Rationale: Hard or cordlike veins may indicate thrombosis or sclerosis and should
not be used.
Question 5
Which action best prevents hemolysis during specimen collection?
A. Shaking tubes vigorously
B. Using a needle that is too small
,C. Allowing alcohol to dry before puncture
D. Drawing blood through an IV line
Correct Answer: C
Rationale: Allowing alcohol to dry prevents red cell damage and reduces
hemolysis.
Question 6
A patient refuses a blood draw after explanation of the procedure. What should the
phlebotomist do?
A. Attempt the draw quickly
B. Restrain the patient
C. Notify the supervisor and document refusal
D. Ask another phlebotomist to try
Correct Answer: C
Rationale: Patients have the right to refuse care. Forced draws are illegal and
unethical.
Question 7
Which tube additive prevents glycolysis?
A. Sodium citrate
B. EDTA
C. Heparin
D. Sodium fluoride
Correct Answer: D
Rationale: Sodium fluoride inhibits glycolysis and is commonly found in gray-top
tubes.
, Question 8
When collecting an ammonia specimen, which handling procedure is required?
A. Store at room temperature
B. Centrifuge immediately
C. Place specimen on ice and transport quickly
D. Protect from light
Correct Answer: C
Rationale: Ammonia levels increase at room temperature; chilling preserves
accuracy.
Question 9
Which vein is the first choice for routine venipuncture in adults?
A. Basilic
B. Cephalic
C. Median cubital
D. Dorsal hand vein
Correct Answer: C
Rationale: The median cubital vein is well anchored, prominent, and has less risk
of complications.
Question 10
After removing the needle, how long should pressure be applied to the site?
A. 10 seconds
B. 30 seconds
C. 1–2 minutes
D. Until bleeding stops
Correct Answer: D
Rationale: Pressure should be maintained until bleeding has completely stopped to
prevent hematoma formation.
QUESTIONS AND CORRECT DETAILED
ANSWERS WITH RATIONALES ||
100% GUARANTEED PASS!!
<LATEST VERSION>
Question 1
Before performing a venipuncture, which action is most critical to prevent a
serious medical error?
A. Selecting the correct needle gauge
B. Verifying patient identity using two identifiers
C. Asking the patient about allergies
D. Applying the tourniquet correctly
Correct Answer: B
Rationale: Positive patient identification using at least two identifiers (e.g., full
name and date of birth) is the most important step to prevent specimen mix-ups
and medical errors.
Question 2
A patient reports feeling lightheaded immediately after tourniquet application.
What is the safest initial action?
A. Remove the tourniquet and continue the draw
B. Have the patient take deep breaths
C. Assist the patient into a supine position
D. Apply a cold compress
,Correct Answer: C
Rationale: Placing the patient in a supine position helps prevent syncope-related
injury and promotes cerebral blood flow.
Question 3
Which tube should be drawn immediately after blood cultures during a routine
venipuncture?
A. Red
B. Lavender
C. Light blue
D. Gray
Correct Answer: C
Rationale: Light blue tubes (sodium citrate) are drawn second to ensure accurate
coagulation testing and to avoid additive contamination.
Question 4
A phlebotomist palpates a vein that feels hard and cordlike. What is the appropriate
action?
A. Proceed with venipuncture
B. Use a butterfly needle
C. Apply a warm compress
D. Select another site
Correct Answer: D
Rationale: Hard or cordlike veins may indicate thrombosis or sclerosis and should
not be used.
Question 5
Which action best prevents hemolysis during specimen collection?
A. Shaking tubes vigorously
B. Using a needle that is too small
,C. Allowing alcohol to dry before puncture
D. Drawing blood through an IV line
Correct Answer: C
Rationale: Allowing alcohol to dry prevents red cell damage and reduces
hemolysis.
Question 6
A patient refuses a blood draw after explanation of the procedure. What should the
phlebotomist do?
A. Attempt the draw quickly
B. Restrain the patient
C. Notify the supervisor and document refusal
D. Ask another phlebotomist to try
Correct Answer: C
Rationale: Patients have the right to refuse care. Forced draws are illegal and
unethical.
Question 7
Which tube additive prevents glycolysis?
A. Sodium citrate
B. EDTA
C. Heparin
D. Sodium fluoride
Correct Answer: D
Rationale: Sodium fluoride inhibits glycolysis and is commonly found in gray-top
tubes.
, Question 8
When collecting an ammonia specimen, which handling procedure is required?
A. Store at room temperature
B. Centrifuge immediately
C. Place specimen on ice and transport quickly
D. Protect from light
Correct Answer: C
Rationale: Ammonia levels increase at room temperature; chilling preserves
accuracy.
Question 9
Which vein is the first choice for routine venipuncture in adults?
A. Basilic
B. Cephalic
C. Median cubital
D. Dorsal hand vein
Correct Answer: C
Rationale: The median cubital vein is well anchored, prominent, and has less risk
of complications.
Question 10
After removing the needle, how long should pressure be applied to the site?
A. 10 seconds
B. 30 seconds
C. 1–2 minutes
D. Until bleeding stops
Correct Answer: D
Rationale: Pressure should be maintained until bleeding has completely stopped to
prevent hematoma formation.
